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Trimethoprim resistance in Escherichia coli isolates from a geriatric unit
E Heikkilä1, L Sundström, P Huovinen
1Department of Medical Microbiology, Turku University, Finland.
Antimicrobial Agents and Chemotherapy
|October 1, 1990
Abstract:
The frequency of trimethoprim resistance among Escherichia coli isolates from urine samples collected at Turku City Hospital, Turku, Finland, remained at 40% during 1984 to 1988. The proportion of highly resistant (MIC, greater than or equal to 1,024 micrograms/ml) isolates increased, however, and most of these harbored the type I dihydrofolate reductase gene. Only a few isolates possessed type II or VII genes.