Neospora caninum and Hammondia heydorni are morphologically and phylogenetically related coccidians that are found in dogs. Although there is serological evidence of N. caninum infection in the white-tailed deer (Odocoileus virginianus), the parasite has not been yet isolated from the tissues of this host. In an attempt to isolate N. caninum from deer, hearts from 4 deer with antibodies to N. caninum were fed to 2 dogs. One of these dogs shed unsporulated oocysts 12–14 μm in diameter. Sporulated oocysts were not infective to Mongolian gerbils (Meriones ungulatus), and DNA isolated from these oocysts was not amplified using N. caninum–specific primers. However, positive amplification with the H. heydorni–specific first internal transcribed spacer (ITS-1) primers and common toxoplasmatiid ITS-1 primers confirmed the presence of H. 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.
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October 2004
RESEARCH NOTES|
October 01 2004
Molecular and Biological Characterization of Hammondia heydorni–Like Oocysts From a Dog Fed Hearts From Naturally Infected White-Tailed Deer (Odocoileus virginianus) Available to Purchase
J. P. Dubey;
J. P. Dubey
aAnimal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705
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C. Sreekumar;
C. Sreekumar
aAnimal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705
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K. B. Miska;
K. B. Miska
aAnimal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705
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D. E. Hill;
D. E. Hill
aAnimal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705
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M. C B. Vianna;
M. C B. Vianna
aAnimal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705
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D. S. Lindsay
D. S. Lindsay
bCenter for Molecular Medicine and Infectious Diseases, Department of Biomedical Sciences and Pathobiology, Virginia–Maryland Regional College of Veterinary Medicine, Virginia Tech, 1410 Prices Fork Road, Blacksburg, Virginia 24061. [email protected]
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J Parasitol (2004) 90 (5): 1174–1176.
Citation
J. P. Dubey, C. Sreekumar, K. B. Miska, D. E. Hill, M. C B. Vianna, D. S. Lindsay; Molecular and Biological Characterization of Hammondia heydorni–Like Oocysts From a Dog Fed Hearts From Naturally Infected White-Tailed Deer (Odocoileus virginianus). J Parasitol 1 October 2004; 90 (5): 1174–1176. doi: https://doi.org/10.1645/GE-324R
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