Cats are important in the epidemiology of Toxoplasma gondii because they are the only hosts that can excrete environmentally resistant oocysts. The prevalence of T. gondii was determined in 58 domestic cats from 51 homes from Santa Isabel do Ivai, Paraná State, Brazil where a water-associated outbreak of acute toxoplasmosis had occurred in humans. Antibodies to T. gondii were found with the modified agglutination test in 49 of 58 (84.4%) cats at a serum dilution of 1:20. Tissues (brain, heart, and skeletal muscle) of 54 of these cats were bioassayed in T. gondii–free, laboratory-reared cats; T. gondii oocysts were excreted by 33 cats that were fed feline tissues. Brains from these 54 cats were bioassayed in mice; T. gondii was isolated from 7. Skeletal muscles and hearts of 15 cats were also bioassayed in mice; T. gondii was isolated from skeletal muscles of 9 and hearts of 13. The results indicate that T. gondii localizes in muscle tissue more than the brains of cats. In total there were 37 T. gondii isolates from 54 cats. Most isolates of T. gondii were virulent for mice. Genotyping of the 37 isolates of T. gondii, using the SAG2 locus, revealed that 15 isolates were type I and 22 were type III. The absence of type II genotype in cats in this study is consistent with the previous studies on T. gondii isolates from Brazil and is noteworthy because most T. gondii isolates from the United States are type II. These findings support the view that Brazilian and North American T. gondii isolates are genetically distinct. This is the first report of genotyping of T. gondii isolates from the domestic cat.
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August 2004
IMMUNOLOGY|
August 01 2004
TOXOPLASMA GONDII INFECTIONS IN CATS FROM PARANÁ, BRAZIL: SEROPREVALENCE, TISSUE DISTRIBUTION, AND BIOLOGIC AND GENETIC CHARACTERIZATION OF ISOLATES
J. P. Dubey;
J. P. Dubey
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
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I. T. Navarro;
I. T. Navarro
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
* Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Campus Universitário, Caixa Postal 6001, CEP 86051-990 Londrina, Paraná, Brazil
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C. Sreekumar;
C. Sreekumar
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
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E. Dahl;
E. Dahl
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
† Division of Parasitic Diseases of Centers for Disease Control and Prevention, 4770 Buford Highway, MS: F22, Chamblee, Georgia 30341
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R. L. Freire;
R. L. Freire
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
* Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Campus Universitário, Caixa Postal 6001, CEP 86051-990 Londrina, Paraná, Brazil
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H. H. Kawabata;
H. H. Kawabata
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
‡ Secretaria Municipal de Saúde de Santa Isabel do Ivai, Paraná, Brazil
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M. C B. Vianna;
M. C B. Vianna
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
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O. C H. Kwok;
O. C H. Kwok
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
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S. K. Shen;
S. K. Shen
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
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P. Thulliez;
P. Thulliez
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
§ Laboratoire de la Toxoplasmose, Institut de Puericulture, 26 Boulevard Brune, F-75014, Paris, France
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T. Lehmann
T. Lehmann
Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, Maryland 20705-2350. [email protected]
† Division of Parasitic Diseases of Centers for Disease Control and Prevention, 4770 Buford Highway, MS: F22, Chamblee, Georgia 30341
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J Parasitol (2004) 90 (4): 721–726.
Citation
J. P. Dubey, I. T. Navarro, C. Sreekumar, E. Dahl, R. L. Freire, H. H. Kawabata, M. C B. Vianna, O. C H. Kwok, S. K. Shen, P. Thulliez, T. Lehmann; TOXOPLASMA GONDII INFECTIONS IN CATS FROM PARANÁ, BRAZIL: SEROPREVALENCE, TISSUE DISTRIBUTION, AND BIOLOGIC AND GENETIC CHARACTERIZATION OF ISOLATES. J Parasitol 1 August 2004; 90 (4): 721–726. doi: https://doi.org/10.1645/GE-382R
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