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June 2, 1956


JAMA. 1956;161(5):475. doi:10.1001/jama.1956.02970050077022

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To the Editor:—  In a recent epidemic of micrococcic (staphylococcic) infections in the nurseries for newborn infants at the Ohio State University Hospital, a single strain of Micrococcus pyogenes, phage type 42B/47C/44A/52, was found to be responsible for all lesions. A report of this epidemic is to be published in Pediatrics. Since that time we have had opportunities to study organisms responsible for similar epidemics among newborn infants and nursing mothers in Portsmouth and Lancaster, Ohio; Lepeer, Mich.; Seattle; Hartford, Wis.; and Philadelphia and have found that in every instance phage type 42B/47C/44A/52 was responsible. This suggests that epidemics of this sort in nurseries for newborn infants may be a disease entity caused by a single strain of M. pyogenes. In all but one instance the strains from the various epidemics mentioned above also demonstrated an identical pattern of antibiotic sensitivity. Studies of this problem are being continued by the

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