New Knowledge of Toxoplasma and Toxoplasma and Toxoplasmosis

Toxoplasmosis

“…A number of factors lead to bradyzoite differentiation and cyst formation, including arginine starvation, alkaline or acidic pH, and interferon-g (IFN-g) stimulation of inducible nitric oxide synthase (iNOS) and nitric oxide [50][51][52]. Cysts can form in tissue culture systems devoid of antibody and complement [53][54][55]. Immunity is of prime importance in regard to the presence of the different forms of the parasite during the extraintestinal cycle in the infected host.…”

Prevalência de toxoplasmose ovina determinada pela reação de Sabin-Feldman em animais de Uruguaiana, RS, Brasil

“…A infecção toxoplásmica nos espécimes ovinos tem merecido a atenção dos pesquisadores que se dedicam à Medicina Veterinária e à Saúde Pública. A importância atribuída à protozoose em termos veteri-nários reside nas verdadeiras epizootias de abortamento e natimortalidade, e seus conseqüentes prejuízos econômicos, fatos já observados na Nova Zelândia, Austrália e Inglaterra (Beverley e Watson, 1964 4 ; Jacobs e col., 1963 18 ; Dubey, 1968 8 ; Jacobs, 1973 17 ; Hartley e Munday, 1974 15 ) e na India e no Canadá (Dubey, 1968 8 ).…”

Serological screening and toxoplasmosis exposure factors among pregnant women in South of Brazil

“…Even though there are few cysts in meat, high meat consumption augments the risk of infection 17 . The ingestion of home-made sausage, a tradition introduced by European immigrants 23 , is probably responsible for the high prevalence of toxoplasmosis in certain regions. People that consume high amounts of meat and raw or poorly cooked meat products and who live in regions with poor sanitation have the highest rates of infection.…”