The penicillin sensitivity and phage types of staphylococci isolated from hospital patients

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Abstract
1. A series of 110 patients with staphylococcal infections has been investigated. From 43 patients a penicillin-resistant staphylococcus was isolated: in cultures from 38 patients all staphylococcal colonies tested were penicillin resistant and in five both sensitive and resistant strains were isolated. Seven patients yielded a streptomycin-resistant staphylococcus.2. Of the 84 strains of staphylococci which could be phage typed, 33 belonged to the group of phages 6/7/47 and 32 were of type 52 A. Of the 32 typable penicillin- resistant strains 18 belonged to the group of phages 6/7/47, and 13 were type 52 A.3. Of the 115 strains isolated 110 were α-lysinogenic.4. These results are compared with those found a year previously and the significant changes are discussed.
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