Screening for Toxoplasma gondii in aborted bovine fetuses in Brazil

Abstract

The aim of this study was to determine if Toxoplasma gondii was present in aborted bovine fetuses in Brazil. Histopathology of 105 cases with suspected infectious abortion, analyzed during the period from 2006 to 2008 at Centro de Pesquisa e Desenvolvimento de Sanidade Animal of Instituto Biológico, São Paulo, showed 75 cases with indications of abortion due to apicomplexan protozoa. These cases were submitted to PCR for verification of the laboratory diagnosis. Fetal DNA was extracted from central nervous system, heart, liver, muscle, and/or placenta samples to obtain a 529 bp DNA fragment. T. gondii DNA was not detected in any of the bovine fetuses analyzed, suggesting that it may not be a frequent cause of bovine abortion.

Fluctuations of antibody serum titers for Toxoplasma gondii and Neospora caninumin naturally infected crossbred cows during gestation

“…In this study, cows seropositive for T. gondii did not abort. This finding corroborates the ones published by Costa et al (2011) andCabral et al (2013) and shows that economic losses due to abortion are not expected in cattle infected with T. gondii except when cows are exposed to virulent strains (Wiengcharoen et al, 2011) with onset of abortion (Gottstein et al, 1998).…”

Determination of Neospora caninum and Toxoplasma gondii in aborted bovine foetuses by duplex PCR, immunohistochemistry and immunofluorescence methods

“…They can occur at any time after the third month of pregnancy, and are most common in the 5 th and 7 th months of pregnancy (4,5). T. gondii can also lead to abortions, although the effect is less severe (11,12,46).…”

Neospora caninum: AVALIAÇÃO DE ANTICORPOS E PROBLEMAS REPRODUTIVOS EM VACAS DE CORTE ATÉ 60 DIAS DE GESTAÇÃO

“…Diferente do encontrado por Ogawa et al 2005e Costa et al (2001) onde 4 e 54 animais, respectivamente, foram soropositivos para ambos os parasitas, em propriedades rurais nos estados do Paraná, São Paulo e Minas Gerais. Contudo, Cabral et al (2013) ao não encontrar DNA para T. gondii em fetos abortados com lesões sugestivas de protozoários, sugerem que apesar dos abortos em bovinos não serem frequentemente correlacionado com T. gondii, sua investigação é tão importante quanto para outros agentes infecciosos.…”