Determination of antimicrobial susceptibilities of Canadian isolates of Haemophilus influenzae and characterization of their beta-lactamases. Canadian Haemophilus Study Group

Authors :: James L. Brunton
Sharon Walmsley
T C Moore
E. Witwicki
S R Scriver
D J Hoban
C. L. Kau
Allison McGeer
Source :: Antimicrobial agents and chemotherapy. 38(7)
Publication Year :: 1994
Abstract: Susceptibility testing of 1,688 Haemophilus influenzae isolates found 484 ampicillin-resistant strains; 474 strains (28.4%) were beta-lactamase positive, and 5 strains (0.4%) were non-beta-lactamase producers. Restriction enzyme digestion of the beta-lactamase amplicon determined that, of 157 strains, 11 (7.0%) contained ROB-1 beta-lactamase and 146 (93.0%) contained a TEM-type beta-lactamase.

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