J R P Dubey

Summary

Affiliation: Agricultural Research Service
Country: USA

Publications

  1. request reprint
    Dubey J, Chapman J, Rosenthal B, Mense M, Schueler R. Clinical Sarcocystis neurona, Sarcocystis canis, Toxoplasma gondii, and Neospora caninum infections in dogs. Vet Parasitol. 2006;137:36-49 pubmed
    ..canis, which corresponds morphologically to infections reported from wide range of terrestrial and marine mammals...
  2. Dubey J, Schares G, Ortega Mora L. Epidemiology and control of neosporosis and Neospora caninum. Clin Microbiol Rev. 2007;20:323-67 pubmed
    ..caninum in animals and humans are tabulated. The role of wildlife in the life cycle of N. caninum and strategies for the control of neosporosis in cattle are discussed. ..
  3. request reprint
    Dubey J. Comparative infectivity of oocysts and bradyzoites of Toxoplasma gondii for intermediate (mice) and definitive (cats) hosts. Vet Parasitol. 2006;140:69-75 pubmed
    ..gondii is most efficient when cats consume tissue cysts (carnivory) or when intermediate hosts consume oocysts (fecal-oral transmission). ..
  4. request reprint
    Dubey J, Applewhaite L, Sundar N, Velmurugan G, Bandini L, Kwok O, et al. Molecular and biological characterization of Toxoplasma gondii isolates from free-range chickens from Guyana, South America, identified several unique and common parasite genotypes. Parasitology. 2007;134:1559-65 pubmed
    ..9) belonging to the clonal type III lineage that exists globally. Infection with 2 genotypes was found from 1 chicken. This is the first report of genetic characterization of T. gondii isolates from any host from Guyana. ..
  5. request reprint
    Dubey J, Sundar N, Pineda N, Kyvsgaard N, Luna L, Rimbaud E, et al. Biologic and genetic characteristics of Toxoplasma gondii isolates in free-range chickens from Nicaragua, Central America. Vet Parasitol. 2006;142:47-53 pubmed
    ..This is the first report of genetic characterization of T. gondii isolates from Nicragua, Central America. ..
  6. request reprint
    Dubey J, Zarnke R, Thomas N, Wong S, Van Bonn W, Briggs M, et al. Toxoplasma gondii, Neospora caninum, Sarcocystis neurona, and Sarcocystis canis-like infections in marine mammals. Vet Parasitol. 2003;116:275-96 pubmed
    ..New cases of clinical S. canis and T. gondii infections are also reported in sea lions, and T. gondii infection in an Antillean manatee (Trichechus manatus manatus). ..
  7. request reprint
    Dubey J, Gennari S, Labruna M, Camargo L, Vianna M, Marcet P, et al. Characterization of Toxoplasma gondii isolates in free-range chickens from Amazon, Brazil. J Parasitol. 2006;92:36-40 pubmed
    ..Fifty percent of the infected mice died of toxoplasmosis, irrespective of the genotype. ..
  8. request reprint
    Dubey J. Unexpected oocyst shedding by cats fed Toxoplasma gondii tachyzoites: in vivo stage conversion and strain variation. Vet Parasitol. 2005;133:289-98 pubmed
    ..Results indicate that bradyzoites may be formed in the peritoneal cavities of mice inoculated intraperitoneally with T. gondii and some bradyzoites might give rise directly to bradyzoites without converting to tachyzoites. ..
  9. request reprint
    Dubey J, Graham D, De Young R, Dahl E, Eberhard M, Nace E, et al. Molecular and biologic characteristics of Toxoplasma gondii isolates from wildlife in the United States. J Parasitol. 2004;90:67-71 pubmed
    ..Toxoplasma gondii was also isolated from 7 of 10 seropositive black bears (Ursus americanus) from Pennsylvania by bioassay in cats. All 3 genotypes of T. gondii based on the SAG2 locus were circulating among wildlife. ..
  10. request reprint
    Dubey J, Lipscomb T, Mense M. Toxoplasmosis in an elephant seal (Mirounga angustirostris). J Parasitol. 2004;90:410-1 pubmed
    ..Tissue cysts were found in sections of cerebrum, and the diagnosis was confirmed by immunohistochemical staining with T. gondii-specific polyclonal rabbit serum. This is the first report of T. gondii infection in an elephant seal...

Locale

Detail Information

Publications26

  1. request reprint
    Dubey J, Chapman J, Rosenthal B, Mense M, Schueler R. Clinical Sarcocystis neurona, Sarcocystis canis, Toxoplasma gondii, and Neospora caninum infections in dogs. Vet Parasitol. 2006;137:36-49 pubmed
    ..canis, which corresponds morphologically to infections reported from wide range of terrestrial and marine mammals...
  2. Dubey J, Schares G, Ortega Mora L. Epidemiology and control of neosporosis and Neospora caninum. Clin Microbiol Rev. 2007;20:323-67 pubmed
    ..caninum in animals and humans are tabulated. The role of wildlife in the life cycle of N. caninum and strategies for the control of neosporosis in cattle are discussed. ..
  3. request reprint
    Dubey J. Comparative infectivity of oocysts and bradyzoites of Toxoplasma gondii for intermediate (mice) and definitive (cats) hosts. Vet Parasitol. 2006;140:69-75 pubmed
    ..gondii is most efficient when cats consume tissue cysts (carnivory) or when intermediate hosts consume oocysts (fecal-oral transmission). ..
  4. request reprint
    Dubey J, Applewhaite L, Sundar N, Velmurugan G, Bandini L, Kwok O, et al. Molecular and biological characterization of Toxoplasma gondii isolates from free-range chickens from Guyana, South America, identified several unique and common parasite genotypes. Parasitology. 2007;134:1559-65 pubmed
    ..9) belonging to the clonal type III lineage that exists globally. Infection with 2 genotypes was found from 1 chicken. This is the first report of genetic characterization of T. gondii isolates from any host from Guyana. ..
  5. request reprint
    Dubey J, Sundar N, Pineda N, Kyvsgaard N, Luna L, Rimbaud E, et al. Biologic and genetic characteristics of Toxoplasma gondii isolates in free-range chickens from Nicaragua, Central America. Vet Parasitol. 2006;142:47-53 pubmed
    ..This is the first report of genetic characterization of T. gondii isolates from Nicragua, Central America. ..
  6. request reprint
    Dubey J, Zarnke R, Thomas N, Wong S, Van Bonn W, Briggs M, et al. Toxoplasma gondii, Neospora caninum, Sarcocystis neurona, and Sarcocystis canis-like infections in marine mammals. Vet Parasitol. 2003;116:275-96 pubmed
    ..New cases of clinical S. canis and T. gondii infections are also reported in sea lions, and T. gondii infection in an Antillean manatee (Trichechus manatus manatus). ..
  7. request reprint
    Dubey J, Gennari S, Labruna M, Camargo L, Vianna M, Marcet P, et al. Characterization of Toxoplasma gondii isolates in free-range chickens from Amazon, Brazil. J Parasitol. 2006;92:36-40 pubmed
    ..Fifty percent of the infected mice died of toxoplasmosis, irrespective of the genotype. ..
  8. request reprint
    Dubey J. Unexpected oocyst shedding by cats fed Toxoplasma gondii tachyzoites: in vivo stage conversion and strain variation. Vet Parasitol. 2005;133:289-98 pubmed
    ..Results indicate that bradyzoites may be formed in the peritoneal cavities of mice inoculated intraperitoneally with T. gondii and some bradyzoites might give rise directly to bradyzoites without converting to tachyzoites. ..
  9. request reprint
    Dubey J, Graham D, De Young R, Dahl E, Eberhard M, Nace E, et al. Molecular and biologic characteristics of Toxoplasma gondii isolates from wildlife in the United States. J Parasitol. 2004;90:67-71 pubmed
    ..Toxoplasma gondii was also isolated from 7 of 10 seropositive black bears (Ursus americanus) from Pennsylvania by bioassay in cats. All 3 genotypes of T. gondii based on the SAG2 locus were circulating among wildlife. ..
  10. request reprint
    Dubey J, Lipscomb T, Mense M. Toxoplasmosis in an elephant seal (Mirounga angustirostris). J Parasitol. 2004;90:410-1 pubmed
    ..Tissue cysts were found in sections of cerebrum, and the diagnosis was confirmed by immunohistochemical staining with T. gondii-specific polyclonal rabbit serum. This is the first report of T. gondii infection in an elephant seal...
  11. request reprint
    Dubey J, Webb D, Sundar N, Velmurugan G, Bandini L, Kwok O, et al. Endemic avian toxoplasmosis on a farm in Illinois: clinical disease, diagnosis, biologic and genetic characteristics of Toxoplasma gondii isolates from chickens (Gallus domesticus), and a goose (Anser anser). Vet Parasitol. 2007;148:207-12 pubmed
    ..gondii isolates belong to the predominant clonal Type II lineages. This is the first report of isolation of viable T. gondii from a domestic goose (Anser anser)...
  12. request reprint
    Dubey J, Thulliez P. Prevalence of antibodies to Neospora caninum in wild animals. J Parasitol. 2005;91:1217-8 pubmed
    ..caninum and that there is no cross-reactivity between the NAT and the modified agglutination test (MAT) for Toxoplasma gondii, because more than 80% of black bears in eastern United States have MAT antibodies at a 1:25 serum solution...
  13. request reprint
    Dubey J, Sreekumar C, Donovan T, Rozmanec M, Rosenthal B, Vianna M, et al. Redescription of Besnoitia bennetti (Protozoa: Apicomplexa) from the donkey (Equus asinus). Int J Parasitol. 2005;35:659-72 pubmed
    ..bennetti was found to be more closely related to the other congeners described from ungulates. The parasite was formally redescribed and specimens deposited in the US National Parasite Collections...
  14. request reprint
    Dubey J, Sreekumar C, Rosenthal B, Vianna M, Nylund M, Nikander S, et al. Redescription of Besnoitia tarandi (Protozoa: Apicomplexa) from the reindeer (Rangifer tarandus). Int J Parasitol. 2004;34:1273-87 pubmed
    ..tarandi was found to be more closely related to the other congeners described from ungulates. The parasite was formally redescribed and specimens deposited in the US National Parasite Collection...
  15. request reprint
    Dubey J, Sreekumar C, Rosenthal B, Lindsay D, Grisard E, Vitor R. Biological and molecular characterization of Besnoitia akodoni n.sp. (Protozoa: Apicomplexa) from the rodent Akodon montensis in Brazil. Parassitologia. 2003;45:61-70 pubmed
    ..akodoni with other members of the genus. However, sequences of the more variable first internal transcribed spacer portion of the ribosomal DNA repeat support its differentiation from the other species of the genus...
  16. request reprint
    Dubey J, Lindsay D, Saville W, Reed S, Granstrom D, Speer C. A review of Sarcocystis neurona and equine protozoal myeloencephalitis (EPM). Vet Parasitol. 2001;95:89-131 pubmed
    ..This paper reviews information on the history, structure, life cycle, biology, pathogenesis, induction of disease in animals, clinical signs, diagnosis, pathology, epidemiology, and treatment of EPM caused by S. neurona...
  17. request reprint
    Dubey J, Shkap V, Pipano E, Fish L, Fritz D. Ultrastructure of Besnoitia besnoiti tissue cysts and bradyzoites. J Eukaryot Microbiol. 2003;50:240-4 pubmed
    ..Enigmatic bodies, characteristically found in Besnoitia sp. bradyzoites, were not observed. Therefore, enigmatic bodies should be removed as a generic character of the bradyzoites of Besnoitia species...
  18. request reprint
    Dubey J, Sreekumar C, Lindsay D, Hill D, Rosenthal B, Venturini L, et al. Besnoitia oryctofelisi n. sp. (Protozoa: Apicomplexa) from domestic rabbits. Parasitology. 2003;126:521-39 pubmed
    ..Based on biological, serological, antigenic, and molecular differences between the rabbit and the opossum Besnoitia, a new name, B. oryctofelisi is proposed for the parasite from domestic rabbits from Argentina...
  19. request reprint
    Dubey J, Lindsay D, Rosenthal B, Thomas N. Sarcocysts of an unidentified species of Sarcocystis in the sea otter (Enhydra lutris). J Parasitol. 2003;89:397-9 pubmed
    ....
  20. request reprint
    Dubey J, Benson J, Larson M. Clinical Sarcocystis neurona encephalomyelitis in a domestic cat following routine surgery. Vet Parasitol. 2003;112:261-7 pubmed
    ..neurona-specific polyclonal rabbit antibody. Two unidentified sarcocysts were present in the cerebellum. It may be possible that stress of surgery triggered relapse of S. neurona infection in this cat...
  21. request reprint
    Dubey J, Tocidlowski M, Abbitt B, Llizo S. Acute visceral toxoplasmosis in captive dik-dik (Madoqua guentheri smithi). J Parasitol. 2002;88:638-41 pubmed
    ..gondii were found in titers of 1:800 or more in both animals upon examination by the modified agglutination rest. The cause of death was considered to be toxoplasmic pneumonia. This is the first report of toxoplasmosis in M. g. smithi...
  22. request reprint
    Dubey J, Lindsay D, Rosenthal B, Sreekumar C, Hill D, Shen S, et al. 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. Int J Parasitol. 2002;32:1053-64 pubmed
    ..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...
  23. request reprint
    Dubey J, Barr B, Barta J, Bjerkas I, Bjorkman C, Blagburn B, et al. Redescription of Neospora caninum and its differentiation from related coccidia. Int J Parasitol. 2002;32:929-46 pubmed
    ..In this article, the authors redescribe the parasite, distinguish it from related coccidia, and provide accession numbers to its type specimens deposited in museums...
  24. request reprint
    Dubey J, Hamir A, Topper M. Sarcocystis mephitisi n. sp. (Protozoa: Sarcocystidae), Sarcocystis neurona-like and Toxoplasma-like infections in striped skunks (Mephitis mephitis). J Parasitol. 2002;88:113-7 pubmed
    ..These sarcocysts were structurally similar to S. neurona sarcocysts. A Toxoplasma gondii-like tissue cyst was found in a section of tongue of 1 of the 4 skunks...
  25. request reprint
    Dubey J, Rosenthal B, Speer C. Sarcocystis lindsayi n. sp. (Protozoa: Sarcocystidae) from the South American opossum, Didelphis albiventris from Brazil. J Eukaryot Microbiol. 2001;48:595-603 pubmed
    ..Natural intermediate hosts for S. lindsayi n. sp. are not known, and fuller characterization of these and other Sarcocystis species would benefit from experimental avian hosts that are more permissive to the maturation of sarcocysts...
  26. request reprint
    Dubey J, Lindsay D, Kerber C, Kasai N, Pena H, Gennari S, et al. First isolation of Sarcocystis neurona from the South American opossum, Didelphis albiventris, from Brazil. Vet Parasitol. 2001;95:295-304 pubmed
    ..The parasite was cultivated in cell culture and S. neurona DNA was isolated from cultured merozoites. This is the first report of isolation of S. neurona from Brazil and the first report from its new host, D. albiventris...