Penicillin tolerance in Streptococcus faecium ATCC 9790.
Tolerant strains of Streptococcus faecium had higher levels of muramidase 2 and lower levels of trypsinactivable muramidase 1 than did susceptible strains. Susceptible strains lysed faster than did tolerant strains in buffer and at some antibiotic concentrations. The addition of Triton X-100 produced equal lysis rates for susceptible and tolerant cultures.
Said
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I
Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
Fletcher
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H
Volpe
A
A
Daneo-Moore
L
L
D001433:Bacteriolysis / Q000187:drug effects; D004361:Drug Tolerance; D009113:Muramidase / Q000032:analysis; D010400:Penicillin G / Q000494:pharmacology*; D013291:Streptococcus / Q000187:drug effects* / Q000201:enzymology
D009113:Muramidase; D010400:Penicillin G