Epidemiological patterns of klebsiella colonization and infection in an intensive care ward

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Abstract
SUMMARY: Twenty-four per cent of 2315 patients admitted to the intensive care unit of St Thomas's Hospital in the 4 year period from November 1969 became colonized or infected withKlebsiellaspecies. Capsular typing of 986 klebsiella isolates from 551 patients showed that there were 695 patient-isolates, mostly derived from the respiratory tract. Capsular types 47 and 21 were the commonest types and together accounted for 19·9% of the patient-isolates. The 14 commonest types accounted for 47·3% of all patient-isolates and all these strains showed clustering, strongly suggesting a changing common source, cross infection, or both.