Salmonella in Retail Food and Wild Birds in Singapore—Prevalence, Antimicrobial Resistance, and Sequence Types

Kyaw Thu Aung, Hong Jun Chen, Man Ling Chau, Grace Yap, Xiao Fang Lim, Mahathir Humaidi, Cliff Chua, Gladys Yeo, Hooi Ming Yap, Jia Quan Oh, Vijitha Manogaran, Hapuarachchige Chanditha Hapuarachchi, Matthias Maiwald, Nancy Wen Sim Tee, Timothy Barkham, Tse Hsien Koh, Ramona Alikiiteaga Gutiérrez, Jorgen Schlundt and Lee Ching Ng
Additional contact information
Kyaw Thu Aung: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Hong Jun Chen: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Man Ling Chau: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Grace Yap: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Xiao Fang Lim: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Mahathir Humaidi: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Cliff Chua: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Gladys Yeo: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Hooi Ming Yap: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Jia Quan Oh: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Vijitha Manogaran: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Hapuarachchige Chanditha Hapuarachchi: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Matthias Maiwald: Department of Pathology and Laboratory Medicine, KK Women’s and Children’s Hospital, Singapore 229899, Singapore
Nancy Wen Sim Tee: Department of Pathology and Laboratory Medicine, KK Women’s and Children’s Hospital, Singapore 229899, Singapore
Timothy Barkham: Department of Laboratory Medicine, Tan Tock Seng Hospital, Singapore 308433, Singapore
Tse Hsien Koh: Department of Pathology, Singapore General Hospital, Singapore 169856, Singapore
Ramona Alikiiteaga Gutiérrez: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
Jorgen Schlundt: Nanyang Technological University Food Technology Centre (NAFTEC), Singapore 637459, Singapore
Lee Ching Ng: Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore

IJERPH, 2019, vol. 16, issue 21, 1-12

Abstract: Non-typhoidal salmonellosis is a leading cause of foodborne zoonosis. To better understand the epidemiology of human salmonellosis, this study aimed to determine the prevalence, antimicrobial resistance and sequence types of Salmonella in retail food and wild birds (proximity to humans) in Singapore. We analyzed 21,428 cooked and ready-to-eat food and 1,510 residual faecal samples of wild birds collected during 2010–2015. Thirty-two Salmonella isolates from food and wild birds were subjected to disc diffusion and multi-locus sequence typing (MLST). Salmonella was isolated from 0.08% (17/21,428) of food and 0.99% (15/1510) of wild birds. None of the isolates from wild birds ( n = 15) exhibited phenotypic resistance, while the isolates from food (47.1%, 8/17) showed a high prevalence of phenotypic resistance to, at least, one antimicrobial. These findings suggested that the avian Salmonella isolates had been subjected to less antimicrobial selection pressure than those from food samples. MLST revealed specific sequence types found in both food and wild birds. The study can guide future studies with whole-genome analysis on a larger number of isolates from various sectors for public health measures.

Keywords: Salmonella; prevalence; molecular epidemiology; antimicrobial resistance; food safety; zoonotic; one health (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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