Intermediate and Transport Hosts of Toxoplasma Gondii in Costa Rica *

Ruiz, Armando; Frenkel, J. K.

doi:10.4269/ajtmh.1980.29.1161

Cited by 138 publications

(75 citation statements)

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“…Dubey and Frenkel (1998) summarized the worldwide prevalence of T. gondii in different species of rats and concluded that the prevalence of viable T. gondii in Rattus norvegicus was generally low. One exception to this finding was for rats in an endemic area in Costa Rica, where Ruiz and Frenkel (1980) isolated viable T. gondii from 15 of 120 rats. In contrast, T. gondii was isolated from only 1 of 107 rats from 47 pig farms in Illinois (Dubey, Weigel et al, 1995), and from only 1 of 238 rats from Grenada, West Indies (Dubey, Bhaiyat et al, 2006).…”

Section: Discussionmentioning

confidence: 81%

Isolation of Toxoplasma gondii from Capybaras (Hydrochaeris hydrochaeris) from São Paulo State, Brazil

Yai

Ragozo²,

Aguiar³

et al. 2008

Journal of Parasitology

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The capybara (Hydrochaeris hydrochaeris) is a large rodent used for human consumption in certain areas of South America. In the present study, viable Toxoplasma gondii was isolated for the first time from this host. Antibodies to T. gondii were assayed in the sera of 64 capybaras from 6 counties of São Paulo State, Brazil, using the modified agglutination test (MAT, Ն1:25 dilution) and the indirect fluorescent antibody test (IFAT, Ն1:16 dilution), and antibodies were found in 48 (75%) by MAT, and 49 (76.6%) by IFAT. Samples of brain, heart, and tongue of 40 seropositive capybaras were pooled, digested in pepsin, and bioassayed in mice. Toxoplasma gondii was isolated from tissue homogenates of 36 capybaras, and the isolates were designated TgCyBr1-36. Most isolates were lethal to mice; 17 of the 36 isolates killed 100% of infected mice, 11 isolates caused mortality in 25-90% of infected mice, and 8 isolates were nonpathogenic to mice. Results indicate that asymptomatic capybaras can harbor mouse-virulent T. gondii, and hence they can serve as a source of infection for humans.

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Section: Discussionmentioning

confidence: 81%

Isolation of Toxoplasma gondii from Capybaras (Hydrochaeris hydrochaeris) from São Paulo State, Brazil

Yai

Ragozo²,

Aguiar³

et al. 2008

Journal of Parasitology

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show abstract

“…Toxoplasma gondii infection in feral chickens and other ground feeding birds is also a good indicator of T. gondii infection in the soil because of their eating habits. In an epidemiologic study in Costa Rica, viable 71 gondii was found in 54% of 50 feral chickens caught around human dwellings (Ruiz & Frenkel, 1980). In that study, 71 gondii infection was demonstrated by bioassay of chicken tissues into mice because the Sabin-Feldman dye test (DT) does not detect antibodies in most avian species sera (Frenkel, 1981;Dubey et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Experimental toxoplasmosis in chukar partridges(Alectoris graeca)

et al. 1995

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“…The seroprevalence of T. gondii in humans and the burden of disease in congenitally infected children in Brazil are highest are among the countries in the world (Gilbert et al, 2008;Dubey, 2010a). Espírito Santo of the strains prevalent in the environment, as FR chickens become infected mostly by feeding from soil contaminated with oocysts (Ruiz and Frenkel, 1980). In the last 12 years we and others have determined prevalence of T. gondii in FR chickens from different regions of Brazil (Peixoto and Lopes, 1990;Garcia et al, 2000;Dubey et al, 2002;da Silva et al, 2003;Dubey et al, 2003a,b;Brandão et al, 2006;Dubey et al, 2006Dubey et al, , 2007Aigner et al, 2010;de Oliveira et al, 2009;Soares et al, 2011).…”

Section: Introductionmentioning

confidence: 99%