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The present study describes the isolation and growth the wild-type rubella virus in RC-IAL. The susceptibility of a rabbit kidney (RC-IAL) to the RV RA 27/3 strain was previously reported by us(4). Samples of 20 patients with suspected cases of rubella infection were tested by serology, virus isolation and nested PCR. The sera were tested by Elisa for the detection of rubella virus antibodies and nested PCR assay was performed to detect RNA virus. The samples of urine, blood, fragments of placenta and amniotic fluid were inoculated in the RC-IAL (rabbit kidney, Institute Adolfo Lutz) and Sirc (rabbit cornea) cell lines. Rubella virus was isolated in samples from 14 of the patients. The CPE (cytopathic effect) was visualized by phase contrast and RV RNA was amplified by nested PCR.The results obtained showed that the cellular lineage RC-IAL is an excellent substratum for isolation of the rubella virus. These findings are important since this is one the few cell lines described in literature that presents a cytopathic effect, so that it can be used to isolate the virus of the clinical specimens. O presente estudo descreve o isolamento e o crescimento do vírus selvagem da rubéola na linhagem celular RC-IAL. A susceptibilidade da linhagem celular RC-IAL (rim de coelho, Instituto Adolfo Lutz) para o vírus-padrão da rubéola RA 27/3 foi anteriormente descrito por nós(4). Amostras de 20 pacientes com suspeita de infecção por rubéola foram testadas por sorologia, isolamento viral e nested PCR. Os soros foram testados por Elisa para detecção de anticorpos reagentes para rubéola e nested PCR para detectar o RNA viral. As amostras clínicas de sangue, urina, fragmento de placenta e líquido amniótico foram inoculadas nas linhagens celulares RC-IAL (rim de coelho, Instituto Adolfo Lutz) e Sirc (córnea de coelho). O vírus da rubéola foi isolado das amostras clínicas de quatorze pacientes. O efeito citopático (ECP) foi examinado por microscopia de contraste de fase, e o RNA do vírus da rubéola foi amplificado por nested PCR. Os resultados obtidos mostram que a linhagem celular RC-IAL é um excelente substrato para isolamento do vírus da rubéola. Estes dados são importantes, pois poucas linhagens descritas na literatura apresentam efeito citopático que possibilite seu uso para isolar o vírus da rubéola de material clínico

Isolation of the wild-type rubella virus in rabbit kidney cell line RC-IAL