Kansenshōgaku zasshi. The Journal of the Japanese Association for Infectious Diseases
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Kansenshogaku Zasshi · Mar 1992
[Virological surveillance of acute respiratory tract illnesses of children in Morioka, Japan. III. Human respiratory coronavirus].
In the virological surveillance of children with acute respiratory tract illnesses, five human respiratory coronaviruses (HRCV) were recovered. Three of these strains were isolated from nasopharyngeal swabs of patients with influenza-like illness collected in Kuji City on March 29, 1979. This may suggest the association of HRCVs and influenza-like illness. ⋯ Reciprocal neutralization titers of antisera against HRCV (strain 229E) and each isolate were determined by 50% plaque reduction tests in monolayers of L132 cells. The neutralizing activities of anti-HRCV (strain 229E) serum against each isolate were 40- to 100-fold lower than that of homologous reaction. The remarkable differences of antigenicity among the isolates did not be observed.