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September 1959

Antibiotic Susceptibility and Phage Types of Pathogenic StaphylococciA Study of Two Hundred Ten Strains Isolated at Boston City Hospital in 1955

AMA Arch Intern Med. 1959;104(3):365-377. doi:10.1001/archinte.1959.00270090019004

The antibiotic susceptibility of pathogenic staphylococci obtained from patients at the Boston City Hospital has been reported on several occasions in the past, and the results of studies carried out on such organisms isolated and studied prior to 1954 have been reviewed elsewhere.1,2 The present paper deals with coagulase-positive staphylococci isolated at this hospital in the latter half of 1955 and their susceptibility to some antibiotics that had been used extensively and to others that had not been available prior to the isolation of these strains. The susceptibility of the isolates to the most extensively used antibiotics has been correlated with their bacteriophage types and with prior antibiotic treatment of the patients from whom they were obtained.

Materials and Methods 

Strains.  —A total of 210 cultures of Staphylococcus pyogenes var. aureus, nearly all of them isolated between Aug. 28 and Nov. 3, 1955, were included; the majority were

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