DISTRIBUTION OF RADIATION RESISTANCES OF MICROBIOLOGICAL CONTAMINANTS OF A COTTON - BASED MEDICAL PRODUCT

摘要

A distribution of radiation resistances of microorganisms has been compiled from the results of D_(10) determinations of isolates recovered from a cotton-based medical product. In all, 250 organisms were isolated from a total microbial population of around 21,000 organisms present on about 170 g of product. D_(10) values of the isolates fall within the range of 0.5 to 3.6 kGy. The findings indicate that organisms having a D_(10) value greater than 3.6 kGy occur amongst contaminants on this cotton product at a probability of less than 1 in 5000. The overall resistance of the population of organisms found in the present study is somewhat less than that of the 'Standard Distribution of Resistances' used in 'AAMI dose setting methods'.