Journal
FOOD MICROBIOLOGY
Volume 62, Issue -, Pages 46-50Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fm.2016.09.007
Keywords
Bacillus cereus; MLST; Clonal complex; Infant formula; Surveillance
Funding
- China Postdoctoral Science Foundation [2015M570525]
- Zhejiang Provincial Natural Science Foundation of China [LY13C200008]
- Major Science and Technology Special Projects of Zhejiang, China [2013C03045-1]
- Public Welfare Project of Zhejiang Province [2015C37058]
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Bacillus cereus sensu stricto is an opportunistic foodborne pathogen. The multilocus sequence type (MLST) of 74 B. cereus isolated from 513 non-random infant formula in China was analyzed. Of 64 sequence types (STs) detected, 50 STs and 6 alleles were newly found in PubMLST database. All isolates except for one singleton (ST-1049), were classified into 7 clonal complexes (CC) by BURST (n-4), in which CC1 with core ancestral clone ST-26 was the largest group including 86% isolates, and CC2, 3, 9, 10 and 13 were first reported in China. MLST profiles of the isolates from 8 infant formula brands were compared. It was found the brands might be potentially tracked by the variety of STs, such as ST-1049 of singleton and ST-1062 of isolate from goat milk source, though they could not be easily tracked just by clonal complex types of the isolates. (C) 2016 Elsevier Ltd. All rights reserved.
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