Abstract
During 2013–2017, a total of 211 cases of listeriosis were reported by 64 sentinel hospitals in China to a national foodborne disease surveillance network. The average case-fatality rate was 31.2% for perinatal cases and 16.4% for nonperinatal cases. Sequence types 87 and 8 were the most prevalent types.
Highlights
During 2013–2017, a total of 211 cases of listeriosis were reported by 64 sentinel hospitals in China to a national foodborne disease surveillance network
All confirmed isolates were referred to Center for Food Safety Risk Assessment (CFSA) for pulsed-field gel electrophoresis and wholegenome sequencing analysis through the National Molecular Tracing Network for Foodborne Disease Surveillance (TraNet)
An estimated 1,662 cases of listeriosis occur each year in the United States [3]; a detailed analysis should be expedited in China to estimate incidence
Summary
A total of 116 isolates isolated during 2013–2016 were submitted to CFSA for whole-genome sequencing analysis: 108 from human listeriosis and 8 from the environment and suspicious food. The distribution of these 108 clinical L. monocytogenes clones was determined by MLST. The prevalences of ST87 in clinical isolates [11] and in domestic food products were reported previously [12]. A total of 89 different core genome MLST types were identified as groups that differ by up to 7 allelic mismatches among the clinical isolates. L. monocytogenes is common in domestic food products in mainland China, especially in meat, poultry, seafood, and Chinese salad [14,15]. An urgent need exists for improving surveillance of food and humans, exploring the mechanisms of pathogenesis, determining higher-risk foods, detecting potential outbreaks, and implementing control measures to protect vulnerable populations
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