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Journal of Antimicrobial Chemotherapy (1996) 38, 881-884
© 1996 The British Society for Antimicrobial Chemotherapy

brief-report

Clinical features of patients with ß-lactamase producing Haemophilus influenzae isolated from sputum

S. R. Johnsona,*, R. C. F. Thompsona, H. Humphreysb and J. T. Macfarlanea

aRespiratory Infection Unit, City Hospital Nottingham NG5 1PB, UK bDivision of Microbiology and Public Health Laboratory, University Hospital, Queens Medical Centre Nottingham, UK

Received 22 January 1996; returned 27 March 1996; accepted 10 June 1996

*Tel: +44-115-960-3268; Fax +44-115-960-2140

Ampicillin resistance amongst isolates of Haemophilus influenzae is of increasing concern but its clinical impact is unclear. We performed a retrospective study of 34 hospital patients with lower respiratory tract infection (LRTI) caused by ß-lactamase positive (ß+) H. influenzae and compared these with 34 control patients with LRTI caused by ß-lactamase negative (ß–) strains. Chronic obstructive pulmonary disease was the most common underlying condition in both groups (ß+23/24, ß–25/34). A recent course of antibiotics, especially ampicillin/amoxycillin, was significantly (P<0.05) more common in the ß+ group (ß+ 17/34, ß– 3/34). Other pathogens were isolated more frequently in the ß+ group (ß+ 10/34, ß– 4/34). There was no difference in outcome between the two groups.


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