Abstract
A total of 863 cultures of staphylococci were obtained from various clinical specimens at Bacteriological Laboratory in Kyorin University Hospital, during a period from March through August, 1980. These isolates were composed of 212 of S. aureus (24.6%) and 649 cultures of coagulase-negative staphylococci (75.2%). Coagulase-negative staphylococci were subjected to species classification by criteria of Kloos & Schleifer. As a result, out of 649 isolates 90 wer e isolated from each specimen of blood, cerebro-spinal fluid, pus and ascites, and also urine with the coccal number more than 105 CFU/ml. These 90 isolates could be classified into 9 species except those of S. hyicus and S. sciuri. The results suggested that most of all coagulase-negative staphylococci have pathogenicity to humans, and that S. xylosus may be an important species of staphylococcal infections in the urinary tract, since 5 of 11 urinary isolates were classified to the species.Although novobiocin susceptibility test have been carried out as an important characteristic for differentiation of S. saprophyticus from other species, in this survey, major coagulase-negative staphylococci; S. xylosus, S. saprophyticus and S. warneri, were found to be novobiocin resistant in the incidence of 5/16 (31.3%), 8/29 (27.6%) and 8/40 (20.0%) respectively. Accordingly, it seems unlikely that novobiocin resistance is a key characteristic to differentiate S. saprophyticus from other species.As to sensitivity tests of major isolates to 10 antibiotics, of 103 S. aureus 21 strains showed resistant to any of the drugs tested, and 39 multi-resistant to 2 or more drugs. Among coagulase-negative strains, S. epidermidis and S. hominis were found to be especially a high incidence of multi-drug resistance, 26/36 (72.2%) and 23/32 (71.9%) respectively. Also out of 53 strains classified to the other species, 16 were multi-resistant ones.
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Schedule a callMore From: Kansenshogaku zasshi. The Journal of the Japanese Association for Infectious Diseases
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