A Neutralization Test for Trachoma and Inclusion Blennorrhoea Viruses Grown in HeLa Cell Cultures

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Abstract
SUMMARY A neutralization test for the viruses of trachoma and inclusion blennorrhoea grown in HeLa cell cultures is described. Antiserum titres, which are independent of virus concentration over a wide range, can be accurately and reproducibly estimated, Limited cross-neutralization tests indicate a close antigenic relationship between one strain of trachoma virus and two strains of inclusion blennorrhoea.