Dolores Hill

Summary

Affiliation: Agricultural Research Service
Country: USA

Publications

  1. doi request reprint Toxoplasma gondii prevalence in farm animals in the United States
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center Animal Parasitic Diseases Laboratory, Beltsville, MD 20705, USA
    Int J Parasitol 43:107-13. 2013
  2. pmc Identification of a sporozoite-specific antigen from Toxoplasma gondii
    Dolores Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Beltsville, Maryland 20705, USA
    J Parasitol 97:328-37. 2011
  3. ncbi request reprint Survival of North American genotypes of Trichinella in frozen pork
    D E Hill
    U S Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, Maryland 20705, USA
    J Food Prot 72:2565-70. 2009
  4. doi request reprint Cessation of Trichinella spiralis transmission among scavenging mammals after the removal of infected pigs from a poorly managed farm: implications for trichinae transmission in the US
    D E Hill
    Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Beltsville, MD 20705 2350, USA
    Zoonoses Public Health 57:e116-23. 2010
  5. doi request reprint Seroprevalence of and risk factors for Toxoplasma gondii in the US swine herd using sera collected during the National Animal Health Monitoring Survey (Swine 2006)
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, MD 20705, USA
    Zoonoses Public Health 57:53-9. 2010
  6. ncbi request reprint Isolation of Neospora caninum from naturally infected white-tailed deer (Odocoileus virginianus)
    M C B Vianna
    United States Department of Agriculture, Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, Beltsville Agricultural Research Center, Building 1001, Beltsville, MD 20705, USA
    Vet Parasitol 129:253-7. 2005
  7. ncbi request reprint Differential detection of Hammondia hammondi from Toxoplasma gondii using polymerase chain reaction
    C Sreekumar
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, 10300 Baltimore Avenue, Beltsville, Maryland 20705, USA
    Parasitol Int 54:267-9. 2005
  8. ncbi request reprint Specific detection of Neospora caninum oocysts in fecal samples from experimentally-infected dogs using the polymerase chain reaction
    D E Hill
    USDA, ARS, LPSI, Parasite Biology and Epidemiology Laboratory, Beltsville, Maryland 20705, USA
    J Parasitol 87:395-8. 2001
  9. ncbi request reprint Trichinella pseudospiralis from a wild pig in Texas
    H R Gamble
    U S Department of Agriculture, Agricultural Research Service, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, MD 20705, USA rgamble2nas edu
    Vet Parasitol 132:147-50. 2005
  10. ncbi request reprint Genotyping and detection of multiple infections of Toxoplasma gondii using Pyrosequencing
    C Sreekumar
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, MD 20705 2350, USA
    Int J Parasitol 35:991-9. 2005

Detail Information

Publications30

  1. doi request reprint Toxoplasma gondii prevalence in farm animals in the United States
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center Animal Parasitic Diseases Laboratory, Beltsville, MD 20705, USA
    Int J Parasitol 43:107-13. 2013
    ..Toxoplasma infection is common in food animals in the United States. Implementation of management factors such as biosecure confinement housing are important in reducing the levels of infection in animals destined for human consumption...
  2. pmc Identification of a sporozoite-specific antigen from Toxoplasma gondii
    Dolores Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Beltsville, Maryland 20705, USA
    J Parasitol 97:328-37. 2011
    ..These data suggest that TgERP may be useful in detecting exposure to sporozoites in early T. gondii infection and implicates oocysts as the agent of infection...
  3. ncbi request reprint Survival of North American genotypes of Trichinella in frozen pork
    D E Hill
    U S Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, Maryland 20705, USA
    J Food Prot 72:2565-70. 2009
    ..These data close a gap in knowledge about the effectiveness of freezing for inactivating these parasites in pork and should alleviate concern about the safety of frozen pork products from the United States...
  4. doi request reprint Cessation of Trichinella spiralis transmission among scavenging mammals after the removal of infected pigs from a poorly managed farm: implications for trichinae transmission in the US
    D E Hill
    Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Beltsville, MD 20705 2350, USA
    Zoonoses Public Health 57:e116-23. 2010
    ..Results of the study suggest that T. spiralis, typically transmitted in the peridomestic rat-pig-human cycle in the US, was not maintained in scavenging mammals in the absence of infected pigs...
  5. doi request reprint Seroprevalence of and risk factors for Toxoplasma gondii in the US swine herd using sera collected during the National Animal Health Monitoring Survey (Swine 2006)
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, MD 20705, USA
    Zoonoses Public Health 57:53-9. 2010
    ..Production practices which eliminate these sources of exposure can reduce the risk of Toxoplasma infection in pigs, and reduce the likelihood of human infection from consumption of infected pork...
  6. ncbi request reprint Isolation of Neospora caninum from naturally infected white-tailed deer (Odocoileus virginianus)
    M C B Vianna
    United States Department of Agriculture, Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, Beltsville Agricultural Research Center, Building 1001, Beltsville, MD 20705, USA
    Vet Parasitol 129:253-7. 2005
    ..This is the first record of in vitro isolation of N. caninum from white-tailed deer and lends credence to the white-tailed deer as an intermediate host for this parasite...
  7. ncbi request reprint Differential detection of Hammondia hammondi from Toxoplasma gondii using polymerase chain reaction
    C Sreekumar
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, 10300 Baltimore Avenue, Beltsville, Maryland 20705, USA
    Parasitol Int 54:267-9. 2005
    ..hammondi from T. gondii even in samples containing both parasites, thus obviating the need for other labourious techniques like mouse bioassay and in vitro cultivation...
  8. ncbi request reprint Specific detection of Neospora caninum oocysts in fecal samples from experimentally-infected dogs using the polymerase chain reaction
    D E Hill
    USDA, ARS, LPSI, Parasite Biology and Epidemiology Laboratory, Beltsville, Maryland 20705, USA
    J Parasitol 87:395-8. 2001
    ..The assay should be useful in epidemiological surveys of both domestic and wild canine hosts and in investigations of oocyst biology in experimental infections...
  9. ncbi request reprint Trichinella pseudospiralis from a wild pig in Texas
    H R Gamble
    U S Department of Agriculture, Agricultural Research Service, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, MD 20705, USA rgamble2nas edu
    Vet Parasitol 132:147-50. 2005
    ..This is the second report of T. pseudospiralis in the United States and the first report of the parasite in a food animal species in the U.S...
  10. ncbi request reprint Genotyping and detection of multiple infections of Toxoplasma gondii using Pyrosequencing
    C Sreekumar
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, MD 20705 2350, USA
    Int J Parasitol 35:991-9. 2005
    ..We conclude that Pyrosequencing offers a simple, rapid and efficient means for diagnosis and genotyping of T. gondii, as well as detection and quantification of multiple genotype infections of T. gondii...
  11. ncbi request reprint Establishment of Besnoitia darlingi from opossums (Didelphis virginiana) in experimental intermediate and definitive hosts, propagation in cell culture, and description of ultrastructural and genetic characteristics
    J P Dubey
    Parasite Biology Laboratory, Beltsville Agricultural Research Center, Animal and Natural Resources Institute, United States Department of Agriculture, Building 1001, BARC East, Beltsville, MD 20705 2350, USA
    Int J Parasitol 32:1053-64. 2002
    ..A close relationship to B. besnoiti and an even closer relationship to B. jellisoni was indicated for B. darlingi on the basis of the small subunit and ITS-1 portions of nuclear ribosomal DNA...
  12. ncbi request reprint Redescription of Neospora caninum and its differentiation from related coccidia
    J P Dubey
    Parasite Biology Laboratory, Beltsville Agricultural Research Center, Animal and Natural Resources Institute, United States Department of Agriculture, Building 1001, BARC East, Beltsville, MD 20705 2350, USA
    Int J Parasitol 32:929-46. 2002
    ..In this article, the authors redescribe the parasite, distinguish it from related coccidia, and provide accession numbers to its type specimens deposited in museums...
  13. ncbi request reprint Biological and genetic characterisation of Toxoplasma gondii isolates from chickens (Gallus domesticus) from São Paulo, Brazil: unexpected findings
    J P Dubey
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Parasite Biology, Epidemiology and Systematics Laboratory, Beltsville, MD 20705 2350, USA
    Int J Parasitol 32:99-105. 2002
    ..gondii isolates. This is the first report of isolation of predominantly type I strains of T. gondii from a food animal. Epidemiological implications of these findings are discussed...
  14. ncbi request reprint Trichinella murrelli in scavenging mammals from south-central Wisconsin, USA
    D E Hill
    US Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory BARC East, Beltsville, Maryland 20705, USA
    J Wildl Dis 44:629-35. 2008
    ..These findings extend the geographic range of T. murrelli into Wisconsin, USA...
  15. doi request reprint Endemic toxoplasmosis in pigs on a farm in Maryland: isolation and genetic characterization of Toxoplasma gondii
    J P Dubey
    U S Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, Maryland 20705 2350, USA
    J Parasitol 94:36-41. 2008
    ..Both genotypes 1 and 2 are considered to belong to the clonal type II lineages. Genotype 3 and 4 are nonclonal isolates. Results document high prevalence of T. gondii in pigs on a farm in Maryland...
  16. ncbi request reprint Neosporosis in Beagle dogs: clinical signs, diagnosis, treatment, isolation and genetic characterization of Neospora caninum
    J P Dubey
    Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agricultural, Building 1001, Beltsville, MD 20705, USA
    Vet Parasitol 149:158-66. 2007
    ..caninum antibody titers were still persistent in these pups at 23 months of age. Results indicate that medication with Clindamycin can improve clinical condition but not eliminate N. caninum infection...
  17. ncbi request reprint Viability and infectivity of Trichinella spiralis muscle larvae in frozen horse tissue
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East Beltsville, MD 20705, USA
    Vet Parasitol 146:102-6. 2007
    ....
  18. ncbi request reprint Larval viability and serological response in horses with long-term Trichinella spiralis infection
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East Beltsville, MD 20705, USA
    Vet Parasitol 146:107-16. 2007
    ..i. and the persistence of infective muscle larvae for at least 1 year, parasite recovery methods are currently the only suitable detection assays for both meat inspection and epidemiological studies of Trichinella infection in the horse...
  19. ncbi request reprint Effects of time and temperature on the viability of Toxoplasma gondii tissue cysts in enhanced pork loin
    D E Hill
    U S Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, Maryland 20705, USA
    J Food Prot 69:1961-5. 2006
    ..gondii tissue cysts in pork loins and that storage at meat case temperatures at or below 0 degrees C (32 degrees F) for 7 days also killed T. gondii tissue cysts in pork loins...
  20. ncbi request reprint A Trichinella murrelli infection in a domestic dog in the United States
    J P Dubey
    Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agricultural, Building 1001, Beltsville, MD 20705, USA
    Vet Parasitol 137:374-8. 2006
    ..murrelli; the isolate was assigned the ISS code: ISS1608 by the International Trichinella Reference Centre. This is the first report of T. murrelli infection in a companion animal...
  21. ncbi request reprint Effect of commonly used enhancement solutions on the viability of Toxoplasma gondii tissue cysts in pork loin
    D E Hill
    U S Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Beltsville, Maryland 20705, USA
    J Food Prot 67:2230-3. 2004
    ..4% potassium or sodium lactate, alone or in combination with other components, prevented transmission of T. gondii to cats...
  22. ncbi request reprint Molecular and biological characterization of Hammondia heydorni-like oocysts from a dog fed hearts from naturally infected white-tailed deer (Odocoileus Virginianus)
    J P Dubey
    Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
    J Parasitol 90:1174-6. 2004
    ..heydorni DNA in the samples. The oocysts were considered to be H. heydorni on the basis of their morphology, biology, and molecular characteristics. This is the first record of a H. heydorni-like parasite in the white-tailed deer...
  23. ncbi request reprint Hammondia heydorni: evidence of genetic diversity among isolates from dogs
    C Sreekumar
    Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
    Exp Parasitol 107:65-71. 2004
    ..heydorni. This diversity should be taken into consideration while attempting to elucidate the systematics, diagnostics, and biology of H. heydorni in relation to N. caninum...
  24. ncbi request reprint Biologic, morphologic, and molecular characterisation of Neospora caninum isolates from littermate dogs
    J P Dubey
    US Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, BARC East, Building 1040, 10300 Baltimore Avenue, Beltsville, MD 20705 2350, USA
    Int J Parasitol 34:1157-67. 2004
    ..caninum tissue cysts from the brain of one dog. Tissue cysts were infective orally to mice and gerbils, but not to cats and dogs. The isolates were also identified as N. caninum by PCR and sequence analysis...
  25. ncbi request reprint Trichinella nativa in a black bear from Plymouth, New Hampshire
    D E Hill
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Building 1044, BARC East, Beltsville, MD 20705, USA
    Vet Parasitol 132:143-6. 2005
    ..Multiplex PCR using genomic DNA from these parasite samples demonstrated that both isolates were T. nativa. This is the first report of the freeze-resistant species, T. nativa, within the continental United States...
  26. ncbi request reprint Isolation, tissue distribution, and molecular characterization of Toxoplasma gondii from chickens in Grenada, West Indies
    J R Dubey
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, Maryland 20705 2350, USA
    J Parasitol 91:557-60. 2005
    ..Phenotypically, all isolates from Grenada were avirulent for mice, whereas those from Brazil were mouse-virulent. This is the first report of isolation of T. gondii from chickens from Grenada, West Indies...
  27. ncbi request reprint Detection of Hammondia heydorni-like organisms and their differentiation from Neospora caninum using random-amplified polymorphic DNA-polymerase chain reaction
    C Sreekumar
    Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705, USA
    J Parasitol 89:1082-5. 2003
    ..It is concluded that H. heydorni and N. caninum are genetically distinct and that such tools may be useful for more detailed characterization of the diversity of related parasites occurring in dogs...
  28. ncbi request reprint Prevalence of viable Toxoplasma gondii in beef, chicken, and pork from retail meat stores in the United States: risk assessment to consumers
    J P Dubey
    United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Beltsville, Maryland 20705 2350, USA
    J Parasitol 91:1082-93. 2005
    ..Nevertheless, consumers, especially pregnant women, should be aware that they can acquire T. gondii infection from ingestion of undercooked meat, and in particular, pork. Cooking meat to an internal temperature of 66 C kills T. gondii...
  29. pmc Alterations in the porcine colon microbiota induced by the gastrointestinal nematode Trichuris suis
    Robert W Li
    USDA ARS ANRI, Bovine Functional Genomics Laboratory, Beltsville, Maryland, USA
    Infect Immun 80:2150-7. 2012
    ..Our findings should facilitate development of strategies for parasitic control in pigs and humans...
  30. ncbi request reprint Identification and characterisation of a cDNA sequence encoding a glutamic acid-rich protein specifically transcribed in Trichinella spiralis newborn larvae and recognised by infected swine serum
    Dante S Zarlenga
    Immunology and Disease Resistance Laboratory, USDA, ARS, ANRI, Beltsville, MD 20705, USA
    Int J Parasitol 32:1361-70. 2002
    ..Mouse antibodies to recombinant antigen localised the glutamic acid-rich proteins to the periphery of the developing stichocyte cells within the newborn larvae consistent with the hypothesis that the newborn larval antigens are secreted...