- Invited review: Genomic selection in dairy cattle: progress and challenges
B J Hayes
Department of Primary Industries Victoria, Biosciences Research Division, Bundoora, Australia
J Dairy Sci 92:433-43. 2009
..Many challenges with genomic selection and its implementation remain, including increasing the accuracy of GEBV, integrating genomic information into national and international genetic evaluations, and managing long-term genetic gain...
- Severity of E. coli mastitis is mainly determined by cow factors
Mammary gland and Mastitis Research Centre, Department of Physiology, Biochemistry and Biometrics, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
Vet Res 34:521-64. 2003
..coli, connection between endotoxins, tumor necrosis factor-alpha and nitric oxide, severity classification of E. coli mastitis, lifespan of neutrophils, host factors that influence severity, tissue damage and production loss...
- Technical note: Derivation of equivalent computing algorithms for genomic predictions and reliabilities of animal merit
MTT Agrifood Research Finland, FIN 31600 Jokioinen, Finland
J Dairy Sci 92:2971-5. 2009
..There were 3 solving strategies compared: 1 method that formed and stored the coefficient matrix in memory and 2 methods that iterate on data. Finally, formulas for reliabilities of genomic predictions of merit were developed...
- Survey of the incidence and aetiology of mastitis on dairy farms in England and Wales
A J Bradley
School of Clinical Veterinary Science, University of Bristol, Langford
Vet Rec 160:253-7. 2007
..Staphylococcus aureus and coagulase-positive staphylococci together accounted for 10 per cent of the samples with high somatic cell counts; 39 per cent produced no bacterial growth...
- Distribution and location of genetic effects for dairy traits
J B Cole
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:2931-46. 2009
..Results validate quantitative genetic assumptions that most traits are due to the contributions of a large number of genes of small additive effect, rather than support the finite locus model...
- Prevalence of Coxiella burnetii antibodies in Danish dairy herds
Jens F Agger
Department of Large Animal Sciences, Faculty of Life Sciences, University of Copenhagen, Groennegaardsvej 8, Frederiksberg, DK 1870 C, Denmark
Acta Vet Scand 52:5. 2010
..The result supports the hypothesis of an increase in the prevalence of positive dairy herds compared to previous years...
- The distribution of Mycobacterium avium ssp. paratuberculosis in the environment surrounding Minnesota dairy farms
E A Raizman
Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, MN 55455, USA
J Dairy Sci 87:2959-66. 2004
..The study results indicate that targeted sampling of cow alleyways and manure storage areas appears to be an alternative strategy for herd screening and Johne's infection status assessment and for estimating herd fecal prevalence...
- Selection of single-nucleotide polymorphisms and quality of genotypes used in genomic evaluation of dairy cattle in the United States and Canada
G R Wiggans
Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 92:3431-6. 2009
..Genotypes from the Illumina BovineSNP50 BeadChip are of high accuracy and provide the basis for genomic evaluations in the United States and Canada...
- Multilocus sequence typing of intercontinental bovine Staphylococcus aureus isolates
E M Smith
Department of Biological Sciences, University of Warwick, Coventry, UK
J Clin Microbiol 43:4737-43. 2005
..Some sequence types (STs; ST25, ST115, ST124, and ST126) demonstrated site specificity, as they were significantly (P < 0.05) associated with milk or teat skin...
- Distribution and antimicrobial resistance of clinical and subclinical mastitis pathogens in dairy cows in Rhône-Alpes, France
Marie Anne Botrel
Agence Francaise de Securite Sanitaire des Aliments, Lyon, France
Foodborne Pathog Dis 7:479-87. 2010
..However, it also confirms the fact that attention must be maintained to avoid any emergence of such resistant bacteria...
- Explaining mastitis incidence in Dutch dairy farming: the influence of farmers' attitudes and behaviour
Department of Communication Science, Wageningen University, Wageningen, The Netherlands
Prev Vet Med 92:210-23. 2009
- Effect of dietary monensin on the bacterial population structure of dairy cattle colonic contents
Jeffery A McGarvey
Plant Mycotoxin Research Unit, Agricultural Research Service, U S Dept of Agriculture, 800 Buchanan St, Albany, CA 94710, USA
Appl Microbiol Biotechnol 85:1947-52. 2010
..the control dairy cattle, down to the genus level...
- Coagulase-negative staphylococci isolated from bovine extramammary sites and intramammary infections in a single dairy herd
University of Helsinki, Faculty of Veterinary Medicine, Department of Production Animal Medicine, Finland
J Dairy Res 75:422-9. 2008
..simulans, was isolated only from three extramammary samples, indicating that Staph. simulans may be more specifically associated with mastitis. Consequently, the origin of CNS mastitis may vary depending on the causing CNS species...
- Seroprevalence and potential risk of bovine brucellosis in zerograzing and pastoral dairy systems in Uganda
J W Magona
National Livestock Resources Research Institute NaLIRRI, P O Box 96, Tororo, Uganda
Trop Anim Health Prod 41:1765-71. 2009
- Aflatoxin binders II: reduction of aflatoxin M1 in milk by sequestering agents of cows consuming aflatoxin in feed
Duarte E Diaz
Department of Animal Science, College of Agriculture and Life Sciences, North Carolina State University, Raleigh, NC 27695-7621, USA
Mycopathologia 157:233-41. 2004
..05% in feed. Potential AFB1 binding agents should be evaluated experimentally to demonstrate efficacy. Our data show that sequestering agents can reduce AFM1 in milk of cows fed AFB1-contaminated feed...
- High prevalence of scrapie in a dairy goat herd: tissue distribution of disease-associated PrP and effect of PRNP genotype and age
Veterinary Laboratories Agency VLA Lasswade, Pentlands Science Park, Penicuik, Midlothian EH26 0PZ, United Kingdom
Vet Res 40:65. 2009
..The results of this study have implications for surveillance and control policies for scrapie in goats...
- A genome scan to detect quantitative trait loci for economically important traits in Holstein cattle using two methods and a dense single nucleotide polymorphism map
H D Daetwyler
Centre for Genetic Improvement of Livestock, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada
J Dairy Sci 91:3225-36. 2008
..The LDRM was well suited for a first genome scan due to its approximately 8 times lower computational demands. Further fine mapping should be applied on the chromosomal regions of interest found in this study...
- Prevalence and persistence of coagulase-negative Staphylococcus species in three dairy research herds
B E Gillespie
Department of Animal Science, The University of Tennessee, Knoxville, TN 37996, USA
Vet Microbiol 134:65-72. 2009
..Average milk SCC (5.32 log(10)/ml) for cows in which CNS was the only bacteria isolated was significantly higher than the average milk SCC (4.90 log(10)/ml) from cows with quarter milk samples that were bacteriologically negative...
- Udder pathogens and their resistance to antimicrobial agents in dairy cows in Estonia
Department of Therapy, Institute of Veterinary Medicine and Animal Science, Estonian University of Life Sciences, Tartu, 51014, Estonia
Acta Vet Scand 53:4. 2011
..The goal of this study was to estimate the distribution of udder pathogens and their antibiotic resistance in Estonia during the years 2007-2009...
- Somatotropic axis components and nutrient partitioning in genetically diverse dairy cows managed under different feed allowances in a pasture system
M C Lucy
Department of Animal Sciences, University of Missouri, Columbia 65211, USA
J Dairy Sci 92:526-39. 2009
..Functional components of the somatotropic axis differed for the respective strains and were consistent with strain differences in milk production, BCS, and feed allowance...
- Detection of spatial and temporal spread of Mycobacterium avium subsp. paratuberculosis in the environment of a cattle farm through bio-aerosols
S W F Eisenberg
Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CN Utrecht, The Netherlands
Vet Microbiol 143:284-92. 2010
- Subclinical mastitis in dairy cows in Swiss organic and conventional production systems
Division of Nutrition and Physiology, Institute of Animal Genetics, Nutrition and Housing, Vetsuisse Faculty, University of Bern, CH 3012 Bern, Switzerland
J Dairy Res 74:86-92. 2007
..05) in OP than in CP cows at 31 d and 102 d post partum. In conclusion, under Swiss conditions, subclinical mastitis is a greater problem in organic than in conventional production systems, but differences are not marked...
- Spread of Q fever within dairy cattle herds: key parameters inferred using a Bayesian approach
INRA, BP 40706, 44307 Nantes, France
Proc Biol Sci 277:2857-65. 2010
..In addition to the biological insights, these estimates also provide information for calibrating simulation models to assess control strategies for C. burnetii infection...
- Computing procedures for genetic evaluation including phenotypic, full pedigree, and genomic information
Department of Animal and Dairy Science, University of Georgia, Athens, Georgia 30602, USA
J Dairy Sci 92:4648-55. 2009
..When the information attributable to genomics can be expressed as modifications to the numerator relationship matrix, the proposed methodology may allow the upgrading of an existing evaluation to incorporate the genomic information...
- Tuberculosis and brucellosis prevalence survey on dairy cattle in Mbarara milk basin (Uganda)
CIRAD EMVT, Programme Productions Animales, Campus International de Baillarguet, TA 30 A, 34398 Montpellier Cedex, France
Prev Vet Med 67:267-81. 2005
..Tuberculosis reactor prevalences were higher in animals from the agro-pastoral zone. However, the individual-animal and herd prevalences of brucellosis seroprevalences were higher in the pastoral zone...
- Bovine mastitis: an evolving disease
Division of Animal Health and Husbandry, Department of Clinical Veterinary Science, University of Bristol, Langford House, Langford, Bristol, BS40 5DU, UK
Vet J 164:116-28. 2002
..The prospects for novel approaches to mastitis control are discussed, as are the current and future challenges facing the industry...
- Weighting factors of sire daughter information in international genetic evaluations
W F Fikse
Interbull Centre, Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala
J Dairy Sci 84:1759-67. 2001
- Pathogen-dependent induction of cytokines and other soluble inflammatory mediators during intramammary infection of dairy cows
D D Bannerman
Bovine Functional Genomics Laboratory, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD 20705, USA
J Anim Sci 87:10-25. 2009
- Detection of quantitative trait loci influencing dairy traits using a model for longitudinal data
S L Rodriguez-Zas
J Dairy Sci 85:2681-91. 2002
..Identified positions can be incorporated into marker-assisted selection decisions to alter the persistency and peak production or the fluctuation of SCS during a lactation...
- A mathematical model of Staphylococcus aureus control in dairy herds
R N Zadoks
Department of Farm Animal Health, Ruminant Health Unit, Faculty of Veterinary Medicine, Utrecht University, The Netherlands
Epidemiol Infect 129:397-416. 2002
..aureus prevalence. For one herd, the model failed to mimic field observations. Explanations for the discrepancy are given in a discussion of current knowledge and model assumptions...
- Milk culture results in a large Norwegian survey--effects of season, parity, days in milk, resistance, and clustering
Department of Norwegian Cattle Health Services, TINE Norwegian Dairies BA, As, Norway
J Dairy Sci 89:1010-23. 2006
..aureus was likely due to higher prevalence of Staph. aureus as a whole, but for CNS, there was also an additional increase caused by a higher proportional rate of penicillin resistance during the late indoor season...
- Survival of Escherichia coli O157:H7 in wastewater from dairy lagoons
S V Ravva
USDA, Agriculture Research Service, Western Regional Research Center, Foodborne Contaminants Research Unit, Albany, CA 94710, USA
J Appl Microbiol 101:891-902. 2006
..To determine the survival of Escherichia coli O157:H7 in dairy wastewater from on-site holding lagoons equipped with or without circulating aerators...
- Bacterial population dynamics in dairy waste during aerobic and anaerobic treatment and subsequent storage
Jeffery A McGarvey
Foodborne Contaminants Research Unit, U S Department of Agriculture, Agricultural Research Service, Albany, CA 94710, USA
Appl Environ Microbiol 73:193-202. 2007
..Anaerobic treatment resulted in fewer alterations, but significant decreases in the phyla Actinobacteria and Bacteroidetes, and increases in the phyla Planctomycetes, Spirochetes, and TM7 were observed...
- Efficacy of Solis, NovasilPlus, and MTB-100 to reduce aflatoxin M1 levels in milk of early to mid lactation dairy cows fed aflatoxin B1
R E Kutz
University of Missouri, Columbia, Missouri 65211, USA
J Dairy Sci 92:3959-63. 2009
..52%). Results indicated that SO and NOV at 0.56% of the diet were effective in reducing milk AFM(1) concentrations in cows consuming a total mixed ration containing 112 microg of AFB(1)/kg of diet DM...
- Multiple quantitative trait loci mapping with cofactors and application of alternative variants of the false discovery rate in an enlarged granddaughter design
Institute of Animal Breeding and Husbandry, University of Kiel, D 24098 Kiel, Germany
Genetics 168:1019-27. 2004
..The relatively high power of this study can be attributed to the size of the experiment, to the QTL analysis with cofactors, and to the application of an appropriate FDR...
- A stochastic model simulating the feeding-health-production complex in a dairy herd
Royal Veterinary and Agricultural University, Department of Animal Science and Animal Health, Copenhagen, Denmark
J Dairy Sci 83:721-33. 2000
- Technical note: use of transfer RNA-intergenic spacer PCR combined with capillary electrophoresis to identify coagulase-negative Staphylococcus species originating from bovine milk and teat apices
Department of Reproduction, Obstetrics, and Herd Health, Faculty of Veterinary Medicine, Ghent University, Belgium
J Dairy Sci 92:3204-10. 2009
- The dynamics of Staphylococcus aureus intramammary infection in nine Danish dairy herds
H D Larsen
Danish Veterinary Laboratory, Copenhagen V, Denmark
Vet Microbiol 71:89-101. 2000
..The results support the hypothesis that some S. aureus mastitis strains are more contagious, virulent or persistent than others. The human reservoir of S. aureus does not play a major role as a source of bovine intramammary infections...
- The interaction of strain of Holstein-Friesian cows and pasture-based feed systems on milk yield, body weight, and body condition score
Dairy Production Department, Teagasc, Dairy Production Research Centre Moorepark, Fermoy, Co Cork, Ireland
J Dairy Sci 88:1231-43. 2005
..00 kg of milk/kg of concentrate for high durability) than the New Zealand strain (0.55 kg of milk/kg of concentrate). The results indicate that the optimum strain of HF will vary with feed system...
- (GTG)5-PCR fingerprinting for the classification and identification of coagulase-negative Staphylococcus species from bovine milk and teat apices: a comparison of type strains and field isolates
Research Group of Industrial Microbiology and Food Biotechnology IMDO, Faculty of Sciences and Bio engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B 1050 Brussels, Belgium
Vet Microbiol 147:67-74. 2011
..The study shows the usefulness of the method to determine the identity of bovine Staphylococcus species, provided an identification framework updated with field isolates is available...
- A mixed methods inquiry: How dairy farmers perceive the value(s) of their involvement in an intensive dairy herd health management program
StrateKo Aps, Gartnervaenget, Denmark
Acta Vet Scand 50:50. 2008
- Voluntary waiting period and adoption of synchronized breeding in dairy herd improvement herds
R H Miller
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705 2350, USA
J Dairy Sci 90:1594-606. 2007
..9% of herd-years (34.9% of cows) for 2005. Procedures for genetic evaluation of daughter pregnancy rate should be examined to determine if herd regimen for reproductive management affects results...
- Distribution of coagulase-negative Staphylococcus species from milk and environment of dairy cows differs between herds
Institute for Agricultural and Fisheries Research ILVO, Technology and Food Science Unit, 9090 Melle, Belgium
J Dairy Sci 94:2933-44. 2011
..For S. haemolyticus and S. simulans, the environment was found as a reservoir, suggesting that IMI with these species were possibly environmental in origin...
- Distribution of superantigenic toxin genes in Staphylococcus aureus isolates from milk samples of bovine subclinical mastitis cases in two major diary production regions of China
Shao Chen Wang
National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People s Republic of China
Vet Microbiol 137:276-81. 2009
..However, some gene combinations suggest the possibility of the existence of variants or new types of MGEs...
- Voluntary waiting period management practices in dairy herds participating in a progeny test program
J M DeJarnette
Select Sires, Inc, Plain City, OH 43064, USA
J Dairy Sci 90:1073-9. 2007
..Opportunities to improve the accuracy of daughter pregnancy rate estimates may reside in models that adjust for VWP management decisions on a within-herd basis...
- Multilocus sequence typing of Staphylococcus aureus isolated from high-somatic-cell-count cows and the environment of an organic dairy farm in the United Kingdom
E M Smith
Department of Biological Sciences, University of Warwick, Coventry, UK
J Clin Microbiol 43:4731-6. 2005
..4% of milk samples. Different strains were associated with variable persistence within quarters. MLST is clearly a very suitable tool for the differentiation and analysis of S. aureus populations detected on dairy cattle farms...
- An outbreak of Streptococcus canis mastitis in a dairy herd in Israel
National Mastitis Reference Centre, Kimron Veterinary Institute, POB 12, Bet Dagan, 50250, Israel
N Z Vet J 53:261-4. 2005
..CLINICAL RELEVANCE: Streptococcus canis infection may cause subclinical mastitis and high bulk SCC in dairy herds and be resolved by treatment with intramammary antibiotics and the introduction of strict hygiene practices...
- Ribotyping of Streptococcus uberis from a dairy's environment, bovine feces and milk
Ruth N Zadoks
Department of Food Science, Cornell University, Ithaca, NY 14853, USA Quality Milk Production Services, 22 Thornwood Drive, Cornell University, Ithaca, NY 14850 1263, USA
Vet Microbiol 109:257-65. 2005
..S. uberis was common in farm soil (31 of 35 samples) but not in non-farm soil (0 of 11 samples). We hypothesize that fecal shedding of S. uberis may play a role in maintenance of S. uberis populations in the dairy ecosystem...
- Mouse lung inflammation after instillation of particulate matter collected from a working dairy barn
Teresa C Wegesser
Pulmonary and Critical Care Medicine, University of California, Davis, Genome and Biomedical Sciences Facility, Davis, CA 95616, USA
Toxicol Appl Pharmacol 236:348-57. 2009
..5-10); however, in contrast with PM(2.5-10) isolated from ambient air in the Central Valley of California, the active components in the insoluble fraction were heat-labile...
- Short communication: Patterns of fecal shedding of Klebsiella by dairy cows
M A Munoz
Quality Milk Production Services, Cornell University, Ithaca, NY 14850 1263, USA
J Dairy Sci 90:1220-4. 2007
..Results from each method suggest that fecal shedding of Klebsiella is associated with transient rather than persistent presence of the organism in the gastrointestinal tract...
- Cow, farm, and management factors during the dry period that determine the rate of clinical mastitis after calving
M J Green
School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, LE12 5RD, United Kingdom
J Dairy Sci 90:3764-76. 2007
..The research indicates that specific dry-period management strategies have an important influence on the rate of clinical mastitis during the next lactation...
- Genotype by environment interaction for production traits while accounting for heteroscedasticity
A G Fahey
Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
J Dairy Sci 90:3889-99. 2007
..21, estimated standard error = 0.22) for the lowest quartile. Reducing HV did not affect estimates of heritabilities or genetic correlations. Results indicated that modest evidence for existence of GxE did not arise solely from HV...
- Differential gene expression of high and low immune responder Canadian Holstein dairy cows
M I Nino-Soto
Department of Pathobiology, Ontario Veterinary College, Canada
Dev Biol (Basel) 132:315-20. 2008
..These results can aid in the establishmentof selection programmes based on broad-based disease resistance, aimed at improving general health in cattle herds...
- Awareness and perceived value of economic information in controlling somatic cell count
M A P M van Asseldonk
Institute for Risk Management in Agriculture and Agricultural Economics Research Institute, Wageningen University and Research Centre, PO Box 8130, 6706 KN Wageningen, The Netherlands
Vet Rec 166:263-7. 2010
..Actions were rationalised in a specific context comprising the intertwined notions of intentions and efficacy beliefs...
- Ambient and indoor particulate aerosols generated by dairies in the southern High Plains
C W Purdy
USDA, Agricultural Research Service, Conservation and Production Research Laboratory, PO Drawer 10, Bushland, TX 79012, USA
J Dairy Sci 92:6033-45. 2009
..6.0 +/- 5.8 microg/m(3); PM(2.5) = 21.0 +/- 2.1 microg/m(3)). Personnel should be protected from high aerosol concentrations found at the commodity barn, compost field, and milking parlor during the winter...
- Pasture-based dairying: challenges and rewards for New Zealand producers
Dexcel, Private Bag 3221, Hamilton, New Zealand
Theriogenology 59:553-61. 2003
New Zealand dairying farm systems are principally pasture-based or seasonal supply. Features of these systems and their management are described, together with their advantages and limitations...
- Management strategies to decrease the prevalence of mastitis caused by one strain of Staphylococcus aureus in a dairy herd
J R Middleton
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman 99164-70601, USA
J Am Vet Med Assoc 218:1615-8, 1581-2. 2001
..One year after implementation of these control measures, incidence of IMI caused by S aureus was 0.35 infections/100 cow months, and prevalence had decreased from 20 to 8%...
- Feeding high proportions of barley grain in a total mixed ration perturbs diurnal patterns of plasma metabolites in lactating dairy cows
B N Ametaj
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
J Dairy Sci 92:1084-91. 2009
..However, further research is warranted to understand involvement of these metabolic changes on the long-term health and productivity of dairy cows...
- Relationships between milk culture results and treatment for clinical mastitis or culling in Norwegian dairy cattle
Department of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, Oslo, Norway
J Dairy Sci 89:2928-37. 2006
..spp. Presence of coagulase-negative Staph. spp. or other pathogens was not associated with either of the outcome variables...
- Relationships between rumen lipopolysaccharide and mediators of inflammatory response with milk fat production and efficiency in dairy cows
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada
J Dairy Sci 92:3800-9. 2009
..Further research is warranted to understand the mechanism(s) by which rumen LPS and inflammatory responses to LPS lower milk fat synthesis and milk energy efficiency and to develop novel strategies for their prevention...
- Diagnosing intramammary infections: evaluation of definitions based on a single milk sample
I R Dohoo
Centre for Veterinary Epidemiological Research, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada C1A 4P3
J Dairy Sci 94:250-61. 2011
..For "any organism," using definition B raised the Sp to 88 and 93% in the 2 data sets, respectively. The final choice of definition will depend on the objectives of study or control program for which the sample was collected...
- Genetic evaluation of fertility traits of dairy cattle using a multiple-trait animal model
Vereinigte Informationssysteme Tierhaltung w V, Heideweg 1, D 27283 Verden, Germany
J Dairy Sci 91:4333-43. 2008
..Integrating fertility traits into a total merit selection index can halt or reverse the decline of fertility and improve the longevity of dairy cattle...
- National intervention study of mastitis control in dairy herds in England and Wales
M J Green
School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Sutton Bonington LE12 5RD, UK
Vet Rec 160:287-93. 2007
..There were also significant reductions of approximately 20 per cent in the incidence of clinical mastitis and in the occurrence of increases in the somatic cell counts of individual cows from below, to above 200,000 cells/ml...
- Clinical parameters for assessment of udder health in Danish dairy herds
Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark
Acta Vet Scand 43:173-84. 2002
..It is further concluded that certain combinations of extended clinical recordings have significant perspectives for future characterisation of udder health...
- [History and economic importance of cattle (Bos taurus L.) in Switzerland from Neolithic to Early Middle Ages]
Institut für Prähistorische und Naturwissenschaftliche Archäologie der Universität Basel
Schweiz Arch Tierheilkd 149:23-9. 2007
..Is this a sign for influence of Roman cattle on today's Swiss breeds?..
- Production effects related to mastitis and mastitis economics in dairy cattle herds
Unit of Animal Health Management, UMR 708 ENVN INRA, National Veterinary School, BP 40706, 44307 Nantes Cedex 03, France
Vet Res 34:475-91. 2003
..To support decision making for udder health control, it is necessary to use a marginal approach, based on the comparison of the losses avoided and the additional costs of modified plans, compared to the existing ones...
- Causative organisms and somatic cell counts in subclinical intramammary infections in milking goats in the UK
S M Hall
Department of Pathology and Infectious Diseases, Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire AL9 7TA
Vet Rec 160:19-22. 2007
..The mean somatic cell count of the uninfected milk samples was 428,000 cells/ml, and 93 percent of uninfected samples had counts less than 1,000,000 cells/ml; the mean cell count of the infected samples was 2,785,000 cells/ml...
- Antimicrobial susceptibility of udder pathogens from cases of acute clinical mastitis in dairy cows
National Veterinary Institute, SE 751 89 Uppsala, Sweden
Vet Microbiol 136:142-9. 2009
..aureus is not uncommon. Penicillin is recommended for treatment of mastitis caused by gram-positive pathogens and regular monitoring of beta-lactamase production in S. aureus is therefore recommended in herds with udder health problems...
- Risk factors for interdigital dermatitis and heel erosion in dairy cows kept in cubicle houses in The Netherlands
J G C J Somers
Agrisystems and Environment, Agrotechnology and Food Innovations, Wageningen University and Research Centrum, P O Box 17, 6700 AA Wageningen, The Netherlands
Prev Vet Med 71:23-34. 2005
..The presence of long cubicles, knee-bumpers installed in cubicles as well as rearing calves and heifers within the dairy cows' accommodation decreased the odds of IDHE...
- A systems comparison of once- versus twice-daily milking of pastured dairy cows
D A Clark
Dexcel, Private Bag 3221, Hamilton, New Zealand
J Dairy Sci 89:1854-62. 2006
..Milking once daily is a viable milking option for New Zealand farmers who are prepared to trade-off loss of MS income for increased time to accomplish other non-milking activities...
- Pros and cons of automatic milking in Europe
K M Svennersten-Sjaunja
Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Kungsängen Research Centre, SE 753 23 Uppsala, Sweden
J Anim Sci 86:37-46. 2008
..With proper management routines, it is possible to achieve a production level and animal well-being in AM systems that are at least as good as in conventional milking systems...
- Development and daily management of an explicit strategy of nonuse of antimicrobial drugs in twelve Danish organic dairy herds
Department of Animal Health, Welfare and Nutrition, Danish Institute of Agricultural Sciences, P O Box 50, DK 8830 Tjele, Denmark
J Dairy Sci 89:1842-53. 2006
..Change toward a nonantimicrobial strategy was gradual and stepwise. All dairy producers in this study desired to preserve the possibility of using antimicrobial drugs in emergencies...
- Major advances in fundamental dairy cattle nutrition
J K Drackley
Department of Animal Sciences, University of Illinois, Urbana, 61801, USA
J Dairy Sci 89:1324-36. 2006
..The result should be improved animal health and well being, more efficient dairy production, and better models to predict nutritional requirements and provide rations to meet those requirements...
- Relationships between selected human resource management practices and dairy farm performance
R E Stup
Department of Dairy and Animal Science, Pennsylvania State University, University Park, 16802, USA
J Dairy Sci 89:1116-20. 2006
..Profitability and productivity did not seem to be major factors in producers' decisions to use or not use HRM practices...
- Prevalence of Giardia and Cryptosporidium spp in calves from a region in New Zealand experiencing intensification of dairying
C L Winkworth
Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
N Z Vet J 56:15-20. 2008
..of Giardia and Cryptosporidium spp in calves born during two spring-calving seasons in a rapidly intensifying dairying region in the South Island; to evaluate potential correlations between the prevalence of the organism and age, ..
- Impact of milking frequencies on the level of free fatty acids in milk, fat globule size, and fatty acid composition
Department of Food Science, Danish Institute of Agricultural Sciences, Research Centre Foulum, DK 8830 Tjele, Denmark
J Dairy Sci 89:1004-9. 2006
..The results are of importance for further understanding the mechanisms behind the increased content of FFA that is frequently observed in automatic milking systems...
- Multiple-trait multiple-country genetic evaluations for udder health traits
Interbull Centre, Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Box 7023, 750 07 Uppsala, Sweden
J Dairy Sci 89:4874-85. 2006
..Reliabilities increased most for young bulls, and for clinical mastitis in countries that did not use the within-country correlations with SCC in the national evaluation (up to a 23% increase in average reliability)...
- Economic evaluation of genomic breeding programs
Institute of Animal Breeding and Genetics, University of Gottingen, 37075 Gottingen, Germany
J Dairy Sci 92:382-91. 2009
- Lameness and claw lesions of the Norwegian red dairy cattle housed in free stalls in relation to environment, parity and stage of lactation
A M Sogstad
Norwegian School of Veterinary Science, P O Box 8146 Dep 0033 Oslo, Norway
Acta Vet Scand 46:203-17. 2005
..As new free stalls are being built, it is important to optimise the conditions for claw health...
- The milk yield response to frequent milking in early lactation of dairy cows is locally regulated
E H Wall
Lactation and Mammary Gland Biology Group, Department of Animal Science, University of Vermont, Burlington 05405, USA
J Dairy Sci 90:716-20. 2007
..Our results demonstrate that UFM is a valid and efficient model for investigating the effects of frequent milking during early lactation in dairy cows...
- Effect of milking frequency and diet on milk production, energy balance, and reproduction in dairy cows
Teagasc Moorepark, Dairy Production Research Centre, Fermoy, Co. Cork, Ireland
J Dairy Sci 89:1478-87. 2006
..3d vs. 28.6d; SED = 1.76). In conclusion, once-daily milking in early lactation may promote earlier resumption of ovarian cyclicity, mediated through improved nutritional status...
- Foot/leg and udder health in relation to housing changes in Swedish dairy herds
Department of Animal Environment and Health, Section of Production Diseases, Swedish University of Agricultural Sciences, P O Box 234, SE 532 23, Skara, Sweden
Prev Vet Med 53:167-89. 2002
..Reductions in the incidence of clinical mastitis were not accompanied by any clear changes in the prevalence of high MSCCs...
- Relationships between milk culture results and composite milk somatic cell counts in Norwegian dairy cattle
Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, PO Box 8146 Dep, N 0033 Oslo, Norway
J Dairy Sci 91:3102-13. 2008
..The sensitivity, specificity, and positive predictive values of the tests were regarded as low when sampling for milk culture was conducted, irrespective of cow level characteristics...
- Comparison of antimicrobial susceptibility of Staphylococcus aureus isolated from bulk tank milk in organic and conventional dairy herds in the midwestern United States and Denmark
College of Veterinary Medicine, Michigan State University, East Lansing, Michigan 48824 1314, USA
J Food Prot 67:1104-10. 2004
..We found small differences between organic and conventional farm types in each country and larger differences between the two national agricultural systems...
- Somatic cell count during and between milkings
R G M Olde Riekerink
Department of Health Management, University of Prince Edward Island, Charlottetown, C1A 4P3 Canada
J Dairy Sci 90:3733-41. 2007
..For accurate interpretations of SCC tests--whether by a laboratory, portable SCC device, or the California Mastitis Test--veterinarians, researchers, and udder health advisors should take milk samples immediately before milking...
- Incidence rate of clinical mastitis on Canadian dairy farms
R G M Olde Riekerink
Department of Health Management, University of Prince Edward Island, Charlottetown, Prince Edward Island, C1A 4P3 Canada
J Dairy Sci 91:1366-77. 2008
..and E. coli IRCM than those in tie-stall barns. The focus of mastitis prevention and control programs should differ between regions and should be tailored to farms based on housing type and BMSCC...
- Management of mastitis on organic and conventional dairy farms
P L Ruegg
Department of Dairy Science, University of Wisconsin, Madison, WI 53706, USA
J Anim Sci 87:43-55. 2009
- Dairy management practices associated with incidence rate of clinical mastitis in low somatic cell score herds in France
Animal Epidemiology Research Unit, INRA, 63122 Saint Genes Champanelle, France
J Dairy Sci 88:3700-9. 2005
..The underlying mechanisms of some highlighted risk factors, such as milk production level and dietary management practices, should be investigated more thoroughly through international collaboration...
- Relationships between milk culture results and milk yield in Norwegian dairy cattle
Norwegian School of Veterinary Science, Department of Production Animal Clinical Sciences, PO Box 8146, N 0033 Oslo, Norway
J Dairy Sci 90:4670-8. 2007
..The same association with test-day milk yield was found among Streptococcus spp.-positive pluriparous cows...
- Combined analysis of data from two granddaughter designs: A simple strategy for QTL confirmation and increasing experimental power in dairy cattle
Institut für Tierzucht und Tierhaltung, Christian Albrechts Universitat, 24098 Kiel, Germany
Genet Sel Evol 35:319-38. 2003
..This study demonstrated the potential benefits of a combined analysis of data from different granddaughter designs...
- Milk fat synthesis in dairy cows is progressively reduced by increasing supplemental amounts of trans-10, cis-12 conjugated linoleic acid (CLA)
L H Baumgard
Department of Animal Science, Cornell University, Ithaca, NY 14853, USA
J Nutr 131:1764-9. 2001
..016% of dietary dry matter) markedly inhibited milk fat synthesis (25% reduction) and that a curvilinear reduction in milk fat yield occurred with increasing quantities of trans-10, cis-12 CLA...
- Shallow groundwater quality on dairy farms with irrigated forage crops
Department of Land, Air, and Water Resources, University of California, Davis 95616 8628, USA
J Contam Hydrol 55:287-315. 2002
..8 m/year, at least locally. Since manure-treated fields represent by far the largest land area of the dairy, proper nutrient management will be a key to protecting groundwater quality in dairy regions overlying alluvial aquifers...
- Mammary cell turnover and enzyme activity in dairy cows: effects of milking frequency and diet energy density
Danish Institute of Agricultural Sciences, Research Centre Foulum, PO Box 50, DK 8830 Tjele, Denmark
J Dairy Sci 88:975-82. 2005
- Risk factors associated with the incidence of veterinary-treated clinical mastitis in Swedish dairy herds with a high milk yield and a low prevalence of subclinical mastitis
A K Nyman
Department of Clinical Sciences, Swedish University of Agricultural Sciences, P O Box 7054, SE 750 07 Uppsala, Sweden
Prev Vet Med 78:142-60. 2007
..The herds participating in this study were all well managed herds, and the attitude towards treatment and production seemed to influence the IRVTCM more than environmental factors...
- A total merit selection index for Ontario organic dairy farmers
OntarBio, RR5 Guelph, Ontario, Canada, N1H 6J2
J Dairy Sci 90:1584-93. 2007
..However, the organic index would allow producers to rank proven bulls in accordance with their perceived needs...
- Epidemiologic study of Giardia sp. infection in dairy cattle in southeastern New York State
S E Wade
Parasitology Section, Department of Population Medicine and Diagnostic Science, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
Vet Parasitol 89:11-21. 2000
..If consideration is to be given to reducing the risk of infection with this parasite, management must be a top priority, especially in younger animals...
- Genetic analysis for mastitis resistance and milk somatic cell score in French Lacaune dairy sheep
Station d amélioration des animaux, Institut National de la Recherche Agronomique, BP 27, 31326 Castanet Tolosan Cedex, France
Genet Sel Evol 33:397-415. 2001
..27). On a lactation basis, our results suggest that selection for mastitis resistance based on SCC is feasible. Patterns for genetic parameters within first lactation, however, require further confirmation and investigation...
- Comparison of production and calving data for 10 Irish dairy herds in the vicinity of an industrial chemical complex and 10 herds in rural, non-industrialised areas
Veterinary Department, Cork County Council, County Hall, Cork, Ireland
Vet Rec 161:841-5. 2007
..05) in the target herds (3.93 per cent) than in the control herds (2.27 per cent). No cause-and-effect relationships between location and multiple birth rate or location and stillbirth incidence were found...
- [Udder health: the influence of BVD-free status]
Tijdschr Diergeneeskd 133:562-5. 2008
..6%; p < 0.05)...
- Simulated economic effects of improving the sensitivity of a diagnostic test in paratuberculosis control
Anne Braad Kudahl
Department of Animal Health, Welfare and Nutrition, Danish Institute of Agricultural Sciences, Foulum, Denmark
Prev Vet Med 78:118-29. 2007
..Also, the milk-ELISA test with its current Se seemed to be profitable already after 2 years in high-prevalence herds using a test-&-cull strategy based on the milk-ELISA alone...
- Udder health shows inbreeding depression in Danish Holsteins
A C Sørensen
Department of Genetics and Biotechnology, Danish Institute of Agricultural Sciences, DK 8830 Tjele, Denmark
J Dairy Sci 89:4077-82. 2006
..00 US dollars under Danish production circumstances. These results are a step on the way to estimating the total cost of inbreeding depression to determine an acceptable rate of inbreeding...