Antibiotic resistance among enterococci causing endocarditis in the UK: analysis of isolates referred to a reference laboratory

Abstract
Results of tests for antibiotic susceptibility were analysed for enterococci referred from patients with a clinical diagnosis of endocarditis between January 1995 and March 1998. Isolates exhibiting high level resistance to gentamicin or streptomycin were defined as those where the concentration of antibiotic required to inhibit growth on laboratory media (minimum inhibitory concentration) exceeded 2000 mg/l.1 Resistance to other antibiotics was defined according to criteria specified by the British Society for Antimicrobial Chemotherapy.5