[Diagnosis of viral infections by means of immunofluorescence].
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Biomedical subjects
Publications and source records attributed to O Goetz.
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A newly developed ion exchange chromatography is reported; it is a simple and quick method to separate a highly purified IgM fraction from blood serum. The immunofluorescence test was used to demonstrate that these fractions contain only virus-specific IgM antibodies, but no demonstrable IgG antibodies, which can often block the specific IgM reactivity by competitive inhibition. The specificity of the reaction was tested on sera from 145 persons: the IgM test was always positive in clinically proven viral infections; the reaction was negative in all patients whose infection had occurred some time in the past. A series of suspected virus infections could be verified by the demonstration of specific IgM antibodies.
26 patients with acute leukemia and other malignancies susceptible to varicella were vaccinated during maintenance chemotherapy. Vaccination was done with OKA strain of live attenuated varicella vaccine developed by Takahashi 1974. All recipients showed no adverse clinical reactions. There was no spread of vaccine virus to others. Seroconversion was 94% in seronegative patients. In those having low antibody titers before vaccination in 56% booster effect was demonstrable. None of the seroconverted recipients contracted varicella in spite of documented contact exposure. Vaccine zoster was not observed. The results suggest that in immunocompromised children live varicella vaccination has a protective effect against varicella infection which has a described mortality rate up 7% in this patients.