The prevalence of Toxoplasma gondii in free-ranging chickens is a good indicator of the presence of T. gondii oocysts in the environment because chickens feed from the soil. In the present study, prevalence of T. gondii in 208 free-range chickens (Gallus domesticus) from Mexico was investigated. Blood, heart, and brain from each animal were obtained to test for T. gondii infection. Antibodies to T. gondii, assayed with the modified agglutination test (1:10 or higher), were found in 13 (6.2%) chickens. Hearts and brains of 13 seropositive chickens were bioassayed in mice, and T. gondii was isolated from 6 chickens. All 6 isolates were avirulent for mice. Genotyping of chicken isolates of T. gondii using the SAG2 locus indicated that 5 were type III and 1 was type I. This is the first report of isolation of T. gondii from chickens from Mexico.
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April 2004
RESEARCH NOTES|
April 01 2004
Isolation and Genotyping of Toxoplasma gondii From Free-Ranging Chickens From Mexico
J. P. Dubey;
J. P. Dubey
aUnited States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, Maryland 20705-2350
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E. S. Morales;
E. S. Morales
bDepartamento de Patología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, Mexico 04510, D.F.
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T. Lehmann
T. Lehmann
cDivision of Parasitic Diseases, Centers for Disease Control and Prevention, 4770 Buford Highway, MS: F22, Chamblee, Georgia 30341. jdubey@anri.barc.usda.gov
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J Parasitol (2004) 90 (2): 411–413.
Citation
J. P. Dubey, E. S. Morales, T. Lehmann; Isolation and Genotyping of Toxoplasma gondii From Free-Ranging Chickens From Mexico. J Parasitol 1 April 2004; 90 (2): 411–413. doi: https://doi.org/10.1645/GE-194R
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