Occurrence of antibodies to Toxoplasma gondii in water buffaloes and meat cattle in Rio Grande do Sul State, southern Brazil.

Serum samples from 169 water buffaloes and 121 beef cattle were analyzed for antibodies to T. gondii by an indirect fluorescent antibody test (IFAT). Positive results were obtained in 27.

Transplacental transmission of Anaplasma marginale in beef cattle chronically infected in southern Brazil.

In this study, we have investigated the incidence of transplacental transmission of Anaplasma marginale in chronically infected cows with no history of acute anaplasmosis during gestation. In addition, we evaluated various techniques for detection of transplacental transmission of A. marginale.

Evaluation of seroepidemiological toxoplasmosis in HIV/AIDS patients in the south of Brazil.

Toxoplasmosis is considered one of the opportunistic infections for individuals with the Acquired Immunodeficiency Syndrome (AIDS), and is also a major cause of morbidity and mortality. The aim of this study was to evaluate the prevalence of neurotoxoplasmosis, ocular toxoplasmosis and antibodies for Toxoplasma gondii in HIV-positive patients attending the SAE (Specialized Assistance Service for HIV/AIDS), as well as to associate their serological profile with epidemiological and clinical data. A total of 250 patients participated in the study from December, 2009 to November, 2010.

[Risk factors and prevalence of antibodies anti-Neospora caninum in urban and rural dogs from Rio Grande do Sul, Brazil].

Serum samples from 339 dogs from rural (beef and dairy farms) and urban areas of Municipality of Pelotas, RS, were tested by indirect fluorescent antibody test to verify the presence of antibodies anti-Neospora caninum. Data from dogs took part of an epidemiologic questionnaire to identify possible risk factors associated with the seropositivity. Antibodies anti-N.

Canine infection by rickettsiae and ehrlichiae in southern Brazil.

This study evaluated the infection caused by Rickettsia and Ehrlichia agents among dogs in southern Brazil. A total of 389 dogs were tested by the indirect immunofluorescence assay (IFA) for Rickettsia rickettsii, Rickettsia parkeri, Rickettsia amblyommii, Rickettsia rhipicephali, Rickettsia bellii, and Ehrlichia canis. Overall, 42.