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J Clin Microbiol. 1977 December; 6(6): 627-632

Anti-complement immunofluorescence test for antibodies to human cytomegalovirus.

ABSTRACT

An anti-complement immunofluorescence (ACIF) test that detects human cytomegalovirus (CMV) antigen in the nuclei of infected cells was used for assay of CMV antibodies in human sera. Various factors influencing the sensitivity and specificity of the ACIF test system were investigated, and results were applied to the development of a procedure which could be completed in a relatively short length of time and gave reproducible results. Results obtained in the ACIF test were compared with those obtained in complement fixation, indirect hemagglutination, and neutralization tests, and the ACIF test was shown to be suitable for detection of significant antibody titer rises and stationary levels of CMV antibody. Heterotypic antibody responses were not seen with sera from other human herpesvirus infections. The nonspecific cytoplasmic staining that occurs in indirect immunofluorescence tests for CMV did not occur in the ACIF system, and sera that were anti-complementary in complement fixation tests could be examined satisfactorily by ACIF. Thus, the test is a valuable supplemental or back-up procedure for the serodiagnosis of CMV infection.