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This study was designed to determine the incidence of previous and current herpesvirus hominis Type II infections in asymptomatic pregnant women. Sera were obtained from 985 patients for detection of Type I and II herpesvirus hominis antibodies. In addition 770 cervical and 211 amniotic fluid cultures for herpesvirus hominis Type II were performed. Identification of previous herpesvirus hominis infection was determined in 352 patients (35.7%) by calculation of a Type II/I antibody index of 85 or greater. Type II herpesvirus hominis was isolated from five cervical cultures for a 0.65% antepartum incidence of infection. None of the amniotic fluid cultures demonstrated virus. The significance of these findings is discussed.

A new disposable micro tissue culture plate was developed and tested for use in virological procedures. Miniature mammalian cell cultures (minicultures) were grown in these plates. Each plate contained 96 circular cultures in flat wells (7 mm in diameter). Replicate titrations of a number of viruses were performed in various tissues. Excellent reproducibility was demonstrated. Mean infectivity titers determined by miniculture methods were generally within 0.6 log(10)/ml of macro tube titrations. Standard tissue culture assay techniques such as hemadsorption, interference titration, and microneutralization were easily carried out with this method and were very reproducible. Development of this noncytotoxic disposable micro tissue culture plate now permits the routine performance of rapid, reliable, and reproducible tissue culture tests at a very significant reduction in cost and labor.

A new 0.01-ml serological microtechnique system produced accurate and reproducible complement-fixation and indirect hemagglutination tests. This equipment involves the use of smaller amounts of antigens and sera, and thus increases the value of the method when employed with expensive reagents or limited qualities of sera.

In an effort to obtain the flexibility and ease of performance of a rapid, serological test for detection of cytomegalovirus antibody, the indirect hemagglutination (IHA) technique was investigated by using a microserological system. Antigens were prepared from tissue cultures of infected human fibroblasts. The specificity of the cytomegalovirus antibody response detected by the IHA test correlated well with the standard neutralization test. The IHA method was more sensitive than the complement fixation test in detecting antibody in congenitally infected newborns. There appeared to be some heterologous antibody response with Herpesvirus hominis or varicella virus infections. The IHA test pattern was found to be very stable with excellent persistence of agglutination.