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Resumen
Compararam-se as reações de imunofluorescência indireta e de SABIN-FELDMAN para a toxoplasmose, em 1000 soros humanos. Encontrou-se estreita concordância quanto a reatividade ou não reatividade dos soros. Quanto a títulos, em 97,7% dos 775 soros reagentes verificou-se concordância ou diferenças de somente uma diluição. Nos demais 2,3% de soros reagentes, estas diferenças não excederam de duas diluições. Em raros soros, entretanto, observaram-se divergências entre os resultados, negativos na reação de imunofluorescência e reagentes na de SABIN-FEDLMAN. Porém tal reatividade apresentou-se instável, tendendo a desaparecer rapidamente desses soros, embora mantidos congelados a -20°C, em contraste com a estabilidade de títulos observada habitualmente nos soros reagentes. Sugere-se a presença de fator modificador de citoplasma, de natureza inespecífica, para os soros de reatividade instável, diverso do fator específico presente no comum dos soros reagentes.
Citas
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