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Haemophilus Influenzae In Adults: An Analysis Of Incidence, Serotype, Biotype, Beta-Lactamase Production And Clinical Spectrum, Mildred Ramsey Norris

MSN Research Projects

A selective medium, chocolate agar with vancomycin, bacitracin, and clindamycin, was used to enhance the recovery of Haemophilus influenzae from adult patients. Cultures of the 634 respiratory specimens yielded 130 (20.5 percent) H. influenzae isolates, representing 93 patients. The serotype, biotype, and Beta-lactamase production of all isolates were determined. Of 103 distinct isolates, nine percent were serotypable and included serogroups a ,b ,d ,and e. Although biotypes I, II, III, V, and VI were represented, 81.5 percent of the isolates were in the II/III group. Twenty-six percent of the isolates were Beta-lactamase producers and, therefore, ampicillin resistant. The clinical characteristics …