Abstract:In this study 80 clinical isolates of Haemophilus influenzae type b from 60 patients were used to analyze if heterogeneous populations of ampicillin resistant and sensitive cells were simultaneously present within each strain and to determine how common this phenomenon was among clinical isolates. A total of 50 ampicillin sensitive clinical isolates were screened for resistance to this antibiotic. It was observed that 32 ampicillin sensitive strains did not contain resistant subpopulations. Furthermore, even w… Show more
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