haemonchiasis

Summary

Summary: Infection with nematodes of the genus HAEMONCHUS, characterized by digestive abnormalities and anemia similar to that from hookworm infestation.

Publications

  1. [Experiences with the FAMACHA-Eye-Colour-Chart for identifying sheep and goats for targeted anthelmintic treatment]
    Regine Koopmann
    Institut für okologischen Landbau der Bundesforschungsanstalt für Landwirtschaft
    Berl Munch Tierarztl Wochenschr 119:436-42
  2. The FAMACHA system for managing haemonchosis in sheep and goats by clinically identifying individual animals for treatment
    Jan A van Wyk
    Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
    Vet Res 33:509-29
  3. Evolution of high-level, multiple anthelmintic resistance on a sheep farm in Malaysia
    P Chandrawathani
    Veterinary Research Institute, 59 Jalan Sultan Azlan Shah, 31400 Ipoh, Malaysia
    Trop Anim Health Prod 35:17-25
  4. Haemonchus contortus: in vitro and in vivo anthelmintic activity of aqueous and hydro-alcoholic extracts of Hedera helix
    T Eguale
    Ethiopian Institute of Agricultural Research, National Animal Health Research Center, P O Box 04, Sebeta, Ethiopia
    Exp Parasitol 116:340-5
  5. Validation of the FAMACHA eye color chart for detecting clinical anemia in sheep and goats on farms in the southern United States
    R M Kaplan
    Department of Medical Microbiology and Parasitology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
    Vet Parasitol 123:105-20
  6. Characterization of moxidectin resistant Trichostrongylus colubriformis and Haemonchus contortus
    L F Le Jambre
    CSIRO Livestock Industries, Locked Bag 1, Armidale, NSW 2350, Australia
    Vet Parasitol 128:83-90
  7. Multiple anthelmintic resistance in Haemonchus contortus isolated from South African Boer goats in Switzerland
    M Schnyder
    Institute of Parasitology, University of Zurich, Winterthurerstrasse 266a, CH-8057 Zurich, Switzerland
    Vet Parasitol 128:285-90
  8. Segregation of natural and experimental gastrointestinal nematode infection in F2 progeny of susceptible Suffolk and resistant Gulf Coast Native sheep and its usefulness in assessment of genetic variation
    J E Miller
    Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
    Vet Parasitol 140:83-9
  9. Anthelmintic activity of Azadirachta indica A. Juss against sheep gastrointestinal nematodes
    C T C Costa
    Faculdade de Veterinária, Universidade Estadual do Cear, Av. Parajana 1700, 60740-000 Fortaleza, Cear, Brazil
    Vet Parasitol 137:306-10
  10. In vitro and in vivo anthelmintic activity of crude extracts of Coriandrum sativum against Haemonchus contortus
    T Eguale
    Ethiopian Institute of Agricultural Research, National Animal Health Research Center, P O Box 04, Sebeta, Ethiopia
    J Ethnopharmacol 110:428-33

Scientific Experts

Detail Information

Publications62

  1. [Experiences with the FAMACHA-Eye-Colour-Chart for identifying sheep and goats for targeted anthelmintic treatment]
    Regine Koopmann
    Institut für okologischen Landbau der Bundesforschungsanstalt für Landwirtschaft
    Berl Munch Tierarztl Wochenschr 119:436-42
    ..But if not working hours are the limiting factor, the repeated score could support the selection of pale animals in need to be treated...
  2. The FAMACHA system for managing haemonchosis in sheep and goats by clinically identifying individual animals for treatment
    Jan A van Wyk
    Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
    Vet Res 33:509-29
    ..contortus for anthelmintic resistance...
  3. Evolution of high-level, multiple anthelmintic resistance on a sheep farm in Malaysia
    P Chandrawathani
    Veterinary Research Institute, 59 Jalan Sultan Azlan Shah, 31400 Ipoh, Malaysia
    Trop Anim Health Prod 35:17-25
    ..There is an urgent need to evaluate other control strategies that incorporate livestock management, the 'smart' use of drugs and non-chemotherapeutic approaches, such as biological control agents...
  4. Haemonchus contortus: in vitro and in vivo anthelmintic activity of aqueous and hydro-alcoholic extracts of Hedera helix
    T Eguale
    Ethiopian Institute of Agricultural Research, National Animal Health Research Center, P O Box 04, Sebeta, Ethiopia
    Exp Parasitol 116:340-5
    ..helix has a potential anthelmintic benefit and further in vitro and in vivo evaluation of the different parts and fractions is needed to make use of this plant for therapeutic purposes...
  5. Validation of the FAMACHA eye color chart for detecting clinical anemia in sheep and goats on farms in the southern United States
    R M Kaplan
    Department of Medical Microbiology and Parasitology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
    Vet Parasitol 123:105-20
    ..However, further studies are required to determine optimal strategies for incorporating FAMACHA-based selective treatment protocols into integrated nematode control programs...
  6. Characterization of moxidectin resistant Trichostrongylus colubriformis and Haemonchus contortus
    L F Le Jambre
    CSIRO Livestock Industries, Locked Bag 1, Armidale, NSW 2350, Australia
    Vet Parasitol 128:83-90
    ..A dose rate of 8 mg/kg levamisole and 185 mg/kg napthalophos achieved >95% reduction in worm count of the MOX-R homozygous H. contortus but only 85 and 7%, respectively against the MOX-R homozygous T. colubriformis...
  7. Multiple anthelmintic resistance in Haemonchus contortus isolated from South African Boer goats in Switzerland
    M Schnyder
    Institute of Parasitology, University of Zurich, Winterthurerstrasse 266a, CH-8057 Zurich, Switzerland
    Vet Parasitol 128:285-90
    ..The results are discussed in relation to the importance of controlling livestock before importation...
  8. Segregation of natural and experimental gastrointestinal nematode infection in F2 progeny of susceptible Suffolk and resistant Gulf Coast Native sheep and its usefulness in assessment of genetic variation
    J E Miller
    Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
    Vet Parasitol 140:83-9
    ..12, and 0.11, 0.22 and 0.12. Based on segregation of infection, larger heritabilities and maternal environment effects that declined after weaning, the summer natural infection was probably the best model for assessing genetic variation...
  9. Anthelmintic activity of Azadirachta indica A. Juss against sheep gastrointestinal nematodes
    C T C Costa
    Faculdade de Veterinária, Universidade Estadual do Cear, Av. Parajana 1700, 60740-000 Fortaleza, Cear, Brazil
    Vet Parasitol 137:306-10
    ..None of the evaluated parameters of the treatment groups were statistically different when compared to the control group, demonstrating that, with the protocol used, A. indica has no anthelmintic effect...
  10. In vitro and in vivo anthelmintic activity of crude extracts of Coriandrum sativum against Haemonchus contortus
    T Eguale
    Ethiopian Institute of Agricultural Research, National Animal Health Research Center, P O Box 04, Sebeta, Ethiopia
    J Ethnopharmacol 110:428-33
    ..Treatment with both doses of Coriandrum sativum did not help the animals improve or maintain their PCV while those treated with albendazole showed significant increase in PCV (p<0.05)...
  11. Evaluation of anthelmintic properties of some plants used as livestock dewormers against Haemonchus contortus infections in sheep
    J B Githiori
    International Livestock Research Institute, Nairobi, Kenya
    Parasitology 129:245-53
    ..No significant differences were observed in mean TWC or number of eggs per female worm between treated animals and the controls. No significant improvements in weight gain were observed in treated lambs...
  12. Epidemiology of parasitic gastrointestinal nematode infections of ruminants on smallholder farms in central Kenya
    J M Nginyi
    National Veterinary Research Centre, Muguga, KARI, Kikuyu, PO Box 32, Kenya
    Res Vet Sci 70:33-9
    ..Based on this study, it is now possible to explore the possibility of using strategic treatments for the control of parasitic gastroenteritis in this area of Kenya...
  13. Accuracy of the FAMACHA system for on-farm use by sheep and goat producers in the southeastern United States
    J M Burke
    Dale Bumpers Small Farms Research Center, USDA, ARS, Booneville, AR 72927, USA
    Vet Parasitol 147:89-95
    ..These data indicate that the FAMACHA method used by producers is a valuable tool for identifying anemic sheep and goats in the southern United States and Puerto Rico...
  14. Efficacy of albendazole and levamisole against gastrointestinal nematodes of sheep and goats in Morogoro, Tanzania
    J D Keyyu
    Department of Veterinary Microbiology and Parasitology, Faculty of Veterinary Medicine, Sokoine University of Agriculture, PO Box 3019, Morogoro, Tanzania
    Trop Anim Health Prod 34:115-20
    ..A reduced efficacy of levamisole was suspected...
  15. Haemonchus contortus and Trichostrongylus colubriformis in pen-trials with Javanese thin tail sheep and Kacang cross Etawah goats
    D B Copeman
    Research Institute for Veterinary Science, Jl RE Martadinata No 30, Bogor 16114, Indonesia
    Vet Parasitol 135:315-23
    ..4%), whereas this pattern was reversed in goats and levels were also lower (4.1 and 8.9%, respectively). There was no apparent relationship between eosinophilia and resistance to infection with H. contortus or T. colubriformis...
  16. Vaccination against the nematode Haemonchus contortus with a thiol-binding fraction from the excretory/secretory products (ES)
    N Bakker
    Division of Parasitology and Tropical Veterinary Medicine, Department of Infectious Diseases and Immunology, Utrecht University, PO Box 80165, 3508 TD Utrecht, The Netherlands
    Vaccine 22:618-28
    ....
  17. Relationship of abomasal histology and parasite-specific immunoglobulin A with the resistance to Haemonchus contortus infection in three breeds of sheep
    A F T Amarante
    Departamento de Parasitologia, Instituto de Biociências, Universidade Estadual Paulista, Caixa Postal 510, IB UNESP, Botucatu SP, CEP 18618 000, Brazil
    Vet Parasitol 128:99-107
    ..Thus, the effect of breed on the functional activity of these and other inflammatory cells is an important area for further study...
  18. Further protection studies using recombinant forms of Haemonchus contortus cysteine proteinases
    D L Redmond
    Moredun Research Institute, International Research Centre, Pentlands Science Park, Penicuik, Midlothian, UK
    Parasite Immunol 28:213-9
    ..Sera from these groups bound to the microvillar surface of the gut of H. contortus...
  19. Effect of sainfoin (Onobrychis viciifolia) silage and hay on established populations of Haemonchus contortus and Cooperia curticei in lambs
    Felix Heckendorn
    Department of Veterinary Parasitology, Research Institute of Organic Agriculture, Ackerstrasse, CH 5070 Frick, Switzerland
    Vet Parasitol 142:293-300
    ..For both, hay and silage, an antiparasitic effect could be shown, offering promising perspectives for the use of conserved tanniferous fodder as a complementary control approach against GIN...
  20. Effect of copper oxide wire particles dosage and feed supplement level on Haemonchus contortus infection in lambs
    J M Burke
    Dale Bumpers Small Farms Research Center, USDA, ARS, Booneville, AR 72927, USA
    Vet Parasitol 123:235-43
    ..PCV values were more favorable for lambs fed the higher level of supplement, especially when FEC were greater than 8000 epg...
  21. Haemonchus contortus egg excretion and female length reduction in sheep previously infected with Oestrus ovis (Diptera: Oestridae) larvae
    G Terefe
    Addis Ababa University, Faculty of Veterinary Medicine, Debre Zeit, P.O. Box 34, Ethiopia
    Vet Parasitol 128:271-83
    ..We conclude that, the establishment of O. ovis larvae in the upper respiratory tract has initiated higher inflammatory cellular activity in group OH there by influencing the development and fecundity of H. contortus in the abomasum...
  22. Direct and indirect anthelmintic effects of condensed tannins in sheep
    Zafar Iqbal
    Chemotherapy Laboratory, Department of Veterinary Parasitology, University of Agriculture, Faisalabad 38040, Pakistan
    Vet Parasitol 144:125-31
    ..The direct anthelmintic effect of CT, therefore, was evidenced by inhibited egg hatching; whereas, faecal egg counts reduction in sheep was through improved nutrient utilization...
  23. Duration of anthelmintic effect of three formulations of ivermectin (oral, injectable and pour-on) against multiple anthelmintic-resistant haemonchus contortus in sheep
    R Garg
    Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, G B P U A and T, Pantnagar 263145, Uttaranchal, India
    Vet Res Commun 31:749-55
    ....
  24. A survey on anthelmintic resistance in nematode parasites of sheep in Lusaka, Zambia
    S Gabrie
    Department of Clinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka
    Onderstepoort J Vet Res 68:271-4
    ..On each of the four farms where ivermectin gave less than 95% reduction in egg counts, there was resistance to albendazole as well. Levamisole showed an efficacy of 95% or higher on all six farms...
  25. The effects of ivermectin and moxidectin on egg viability and larval development of ivermectin-resistant Haemonchus contortus
    K L Tyrrell
    CSIRO Livestock Industries, Locked Bag 1, Armidale NSW, Australia
    Vet Parasitol 107:85-93
    ....
  26. Effect of sericea lespedeza (Lespedeza cuneata) fed as hay, on natural and experimental Haemonchus contortus infections in lambs
    K C Lange
    Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
    Vet Parasitol 141:273-8
    ..2%) than on establishment of incoming larvae (26.1%). SL fed as hay may be more useful to remove existing worms than establishing worms. The decrease in FEC would have the benefit of reduced pasture contamination...
  27. Detection of anthelmintic resistance: a comparison of mathematical techniques
    P R Torgerson
    Institute of Parasitology, University of Zurich, Winterthurerstrasse 266a, CH 8057 Zurich, Switzerland
    Vet Parasitol 128:291-8
    ....
  28. Ovicidal and larvicidal activity of Melia azedarach extracts on Haemonchus contortus
    M V Maciel
    College of Veterinary Medicine, Ceará State University, Av. Paranjana 1700, Campus do Itaperi, CEP 60740-000, Fortaleza, Cear, Brazil
    Vet Parasitol 140:98-104
    ..36mgmL(-1)) and the leaf ethanol extract showed the best inhibition of larval development (LC50=9.18mgmL(-1)). Phytochemical analysis of the most active extracts revealed the presence of condensed tannins, triterpenes and alkaloids...
  29. Phenotypic characterization of Haemonchus contortus: a study of isolates from Sweden and Kenya in experimentally infected sheep
    K Troell
    Department of Parasitology (SWEPAR, National Veterinary Institute and Swedish University of Agricultural Sciences, 751 89 Uppsala, Sweden
    Parasitology 132:403-9
    ..This study showed that H. contortus exhibited similar phenotypic traits regardless of geographical origin. Thus, there was limited evidence for adaptations to temperate climatic conditions...
  30. Metalloendopeptidases from the intestinal brush border of Haemonchus contortus as protective antigens for sheep
    W D Smith
    Moredun Research Institute, Penicuik, Midlothian, EH26 OPZ UK
    Parasite Immunol 25:313-23
    ....
  31. Immune response to Haemonchus contortus infection in susceptible (INRA 401) and resistant (Barbados Black Belly) breeds of lambs
    G Terefe
    Addis Ababa University, Faculty of Veterinary Medicine, Debre Zeit, Ethiopia
    Parasite Immunol 29:415-24
    ..contortus infection is a Th2-biased immunity in which the BBB showed its maximal performance during the primary infection, the INRA breed performed better after re-infection compared to its response to first exposure...
  32. Trichostrongylus colubriformis and Haemonchus contortus infections in light bodyweight Merino lambs
    S J McClure
    FD McMaster Laboratory, CSIRO Livestock Industries, Locked Bag 1, Delivery Centre, Armidale NSW 2350, Australia
    Aust Vet J 85:437-45
    ....
  33. Attempts to detect synergy between vaccination and anthelmintic against a drug resistant isolate of Haemonchus contortus
    W D Smith
    Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, Scotland EH26 0PZ, UK
    Vet Parasitol 148:356-9
    ..It was concluded that there was no evidence for synergy between a gut membrane protein vaccine and ivermectin or fenbendazole against an anthelmintic resistant isolate of H. contortus...
  34. Protection induced by vaccinating sheep with a thiol-binding extract of Haemonchus contortus membranes is associated with its protease components
    D P Knox
    Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, Midlothian, UK
    Parasite Immunol 27:121-6
    ..Immunization stimulated a marked IgG response with the IgG2 isotype predominating...
  35. Immunization against ovine haemonchosis with three low molecular weight somatic antigens of adult Haemonchus contortus
    J M Alunda
    Dpto. Patología Animal I (Sanidad Animal, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM, Spain
    J Vet Med B Infect Dis Vet Public Health 50:70-4
    ..Lambs in the F8-vaccinated group showed on average delayed pre-patent period, lower faecal egg counts and reduction of abomasal worm burdens, although the differences were not statistically significant...
  36. Influence of sex on the resistance of sheep lambs to an experimental Haemonchus contortus infection
    M Gauly
    Institute of Animal Breeding and Genetics, University of Göttingen, Germany
    Dtsch Tierarztl Wochenschr 113:178-81
    ..Therefore male breeding values are probably not representative for the whole population...
  37. The anthelmintic efficacy of the plant, Albizia anthelmintica, against the nematode parasites Haemonchus contortus of sheep and Heligmosomoides polygyrus of mice
    John B Githiori
    International Livestock Research Institute ILRI, P O Box 30709, Nairobi, Kenya
    Vet Parasitol 116:23-34
    ..anthelmintica preparation resulted in death of all mice. The results show that A. anthelmintica at the doses and preparations used is not efficacious against H. contortus in sheep or against H. polygyrus in mice...
  38. Haemonchus spp. in sheep farmed under resource-poor conditions in South Africa--effect on haematocrit, conjunctival mucous membrane colour and body condition
    A F Vatta
    Onderstepoort Veterinary Institute, Private Bag X05, Onderstepoort 0110, South Africa
    J S Afr Vet Assoc 73:119-23
    ....
  39. Field studies on the biological control of nematode parasites of sheep in the tropics, using the microfungus Duddingtonia flagrans
    P Chandrawathani
    Veterinary Research Institute, 59 Jalan Sultan Azlan Shah, 31400 Ipoh, Malaysia
    Vet Parasitol 120:177-87
    ..These results show that the deployment of the nematophagous fungus, D. flagrans, can improve the level of parasite control of sheep in the tropics above that which can be achieved by the short-term rotational grazing strategy alone...
  40. In vivo effects of Fagara leaves on sheep infected with gastrointestinal nematodes
    F E Zinsou
    Faculty des Sciences Agronomiques, Université d'Abomey-Calavi, Cotonou République du Benin
    Trop Anim Health Prod 37:205-14
    ..Results of both studies suggest that Fagara leaves might be an alternative option to chemotherapy to modulate the epidemiology of H. contortus in tropical countries...
  41. Inheritance of fecal egg count and packed cell volume and their relationship with production traits in sheep infected with Haemonchus contortus
    H B Vanimisetti
    Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24061, USA
    J Anim Sci 82:1602-11
    ..Selection for resistance to H. contortus is therefore possible and should not adversely affect growth of lambs and fertility of ewes in this production environment...
  42. Interaction between copper oxide wire particles and Duddingtonia flagrans in lambs
    J M Burke
    Dale Bumpers Small Farms Research Center, USDA, ARS, Booneville, AR 72927, USA
    Vet Parasitol 134:141-6
    ..flagrans, the expected result would be a much lower larval challenge on pasture when these two tools are used together in a sustainable control strategy...
  43. Heterosis analysis of Haemonchus contortus resistance and production traits in Rhoen sheep, Merino Land sheep and crossbred lambs
    A Hielscher
    Institute of Animal Breeding and Genetics, University of Giessen, Ludwigstrasse 21, 35398 Giessen, Germany
    Vet Parasitol 141:279-84
    ..These results suggested that crossbreeding Rh to Ml sheep may be a suitable way of producing lambs with improved resistance to H. contortus infection without any negative effects on production traits...
  44. Estimating genetic differences in natural resistance in Rhön and Merinoland sheep following experimental Haemonchus contortus infection
    M Gauly
    Department of Animal Breeding and Genetics, Oberer Hardthof 18, Justus Liebig University of Giessen, D 35398 Giessen, Germany
    Vet Parasitol 106:55-67
    ..01). IgG was significantly (P<0.05) and positively correlated with worm burden in male Merinoland and IgL with worm burden in male Rhön sheep...
  45. [Use of FAMACHA Scoring System as a diagnostic aid for the registration of distinguishing marks in the breeding program for lambs exposed to an experimental Haemonchus contortus infection]
    M Gauly
    Institut für Tierzucht und Haustiergenetik der Georg August Universität Göttingen
    Dtsch Tierarztl Wochenschr 111:430-3
    ..The estimated correlations have been low. This proofs the limits of the FAMACHA system under a situation of low parasite pressure...
  46. Development and survival of Haemonchus contortus infective larvae derived from sheep faeces under sub-tropical conditions in the Potohar region of Pakistan
    Farhana Riaz Chaudary
    Department of Zoology, University of Arid Agriculture, Rawalpindi, Pakistan
    Trop Anim Health Prod 40:85-92
    ..Thus, long pasture rest periods, especially during the high risk wet season, may be a helpful strategy to reduce the infection levels...
  47. Anthelmintic activity of Chenopodium album (L) and Caesalpinia crista (L) against trichostrongylid nematodes of sheep
    Abdul Jabbar
    Chemotherapy Laboratory, Department of Veterinary Parasitology, University of Agriculture, Faisalabad 38040, Pakistan
    J Ethnopharmacol 114:86-91
    ..1-95.6% reduction in EPG. CONCLUSIONS: These data show that both Caesalpinia crista and Chenopodium album possess anthelmintic activity in vitro and in vivo, thus, justifying their use in the traditional medicine system of Pakistan...
  48. Performance and nematode infection of ewe lambs on intensive rotational grazing with two different cultivars of Panicum maximum
    R L D Costa
    Apta RegionalExtremo Oeste, Andradina, SP, Brazil
    Trop Anim Health Prod 39:255-63
    ..2% crude protein in Aruana grass and 8.7% in Tanzania grass, p < 0.05) which may have improved the immunological system with the consequence that the highest PCV (p < 0.05) observed in those animals...
  49. Efficacy of the nematode-trapping fungus Duddingtonia flagrans against infections by Haemonchus and Trichostrongylus species in lambs at pasture
    R A Rocha
    UNESP, São Paulo State University, Instituto de Biociências, Departamento de Parasitologia, Caixa Postal 510, CEP 18618 000, Botucatu, SP, Brazil
    J Helminthol 81:387-92
    ..05). Feeding sheep with pellets containing D. flagrans had no benefit to the prophylaxis of nematode infections under the experimental conditions used in the present study...
  50. Consequences of the unusually warm and dry summer of 2003 in The Netherlands: poor development of free living stages, normal survival of infective larvae and long survival of adult gastrointestinal nematodes of sheep
    M Eysker
    Division of Parasitology and Tropical Veterinary Medicine, Utrecht University, P O 80, 165, 3508 TD Utrecht, The Netherlands
    Vet Parasitol 133:313-21
    ..That may have consequences for the application of evasive grazing as a control option in that suppression of adult burdens might still be necessary, through a limited use of anthelmintics or through alternative deworming strategies...
  51. The epidemiology of abomasal nematodes of sheep in Sweden, with particular reference to over-winter survival strategies
    P J Waller
    Department of Parasitology SWEPAR, National Veterinary Institute and Swedish University of Agricultural Sciences, SE 751 89 Uppsala
    Vet Parasitol 122:207-20
    ..In contrast, T. circumcincta can survive well over-winter, both on pasture and within the host...
  52. Towards the eradication of Haemonchus contortus from sheep flocks in Sweden
    P J Waller
    Department of Parasitology SWEPAR, National Veterinary Institute and Swedish University of Agricultural Sciences, Uppsala, Sweden
    Vet Parasitol 136:367-72
    ....
  53. Efficiency of feeding Duddingtonia flagrans chlamydospores to grazing ewes on reducing availability of parasitic nematode larvae on pasture
    M E Fontenot
    Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
    Vet Parasitol 118:203-13
    ..This study showed that D. flagrans, fed daily to grazing ewes, was an effective biological control agent in reducing a predominantly H. contortus larval population on pasture...
  54. High-level ivermectin resistance in a field isolate of Haemonchus contortus associated with a low level of resistance in the larval stage: implications for resistance detection
    Andrew C Kotze
    CSIRO Livestock Industries, McMaster Laboratory, Locked Bag 1 Delivery Centre, Blacktown 2148, NSW, Australia
    Vet Parasitol 108:255-63
    ..This study highlights the need to examine this aspect of LDAs in order to detect the type of resistance displayed by IVPro H. contortus...
  55. Top dressing of feed with desiccated chlamydospores of Duddingtonia flagrans for biological control of the pre-parasitic stages of ovine Haemonchus contortus
    P K Sanyal
    Biotechnology Laboratory, National Dairy Development Board, Anand-388 001, Gujarat, India
    Vet Res Commun 27:381-90
    ..Top dressing supplementary feed with dried chlamydospores offers a potential way of using D. flagrans for biological control of the pre-parasitic stages of H. contortus...
  56. Genetic parameters for resistance to Haemonchus contortus in Merino sheep in South Africa
    S W Nieuwoudt
    ARC-Animal Improvement Institute, Irene, South Africa
    J S Afr Vet Assoc 73:4-7
    ..13 +/- 0.09). These results suggest that FEC can be used as a selection criterion for resistance to H. contortus infections in Merino sheep...
  57. Comparison of the resistance to sympatric and allopatric isolates of Haemonchus contortus of Black Belly sheep in Guadeloupe (FWI) and of INRA 401 sheep in France
    G Aumont
    INRA, Unité de Zootechnie, BP 515, 97165, Pointe à Pitre, France
    Vet Parasitol 116:139-50
    ..The regulation of worm population and fecundity differed in the BB and INRA 401 sheep...