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Published on: January 17, 2014
Random colony selection versus colony morphology for detection of multiple pneumococcal serotypes in nasopharyngeal
Kim Maree Hare1, Peter Morris, Heidi Smith-Vaughan
1Menzies School of Health Research, Darwin, Northern Territory, Australia.
Abstract:
Detection of multiple serotype carriage is important in understanding pneumococcal epidemiology. We compared random selection of 4 pneumococcal colonies per swab with selection by colony morphology. Multiple serotypes were detected in 20% of 98 swabs; 14% by morphology and 17% by random selection. Selection by morphology was more efficient per colony, but underestimated the true rate of multiple carriage.
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