Mixed bacterial and viral infections are common in children

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Abstract
Acute phase and convalescent sera from 51 pediatric patients who had a documented viral infections and no obvious culture-confirmed bacterial infection such as meningitis, otitis media or urinary tract infection were tested by enzyme immunoassay for antibodies to Haemophilus influenzae and Branhamella catarrhalis and by the latex agglutination test for pneumococcal antigens to evaluate the frequency of mixed bacterial and viral infections. A mixed bacterial and viral infection was documented in 19 patients (37%). Seven patients (14%) showed a diagnostic rise in antibodies to H. influenzae and 8 patients (16%) showed an antibody elevation to B. catarrhalis in their