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Enumeration and characterization of Salmonella isolates from retail chicken carcasses in Beijing, China. 2014

Yeru Wang, and Qian Chen, and Shenghui Cui, and Xiao Xu, and Jianghui Zhu, and Haipeng Luo, and Di Wang, and Fengqin Li
1 Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center for Food Safety Risk Assessment , Beijing, China .

Epidemiological reports have implicated contaminated raw or undercooked chicken as primary vehicles of Salmonella transmission to human beings. Risk assessments relating to Salmonella contamination of poultry products in China are frequently hampered by the lack of quantitative data. In this study, whole chicken carcasses (n=395) were collected from the retail markets of Beijing, and the level of Salmonella contamination was enumerated by most probable number (MPN) analysis and all Salmonella isolates were further characterized for their serotypes and antimicrobial resistance. Overall, 49.9% (197/395) of the retail whole chicken carcasses were contaminated by Salmonella and the MPN values ranged from 1.5 to >550 MPN/100 g. The 50% percentile of Salmonella MPN value was 7.5 MPN/100 g in chicken carcass. The predominant serotypes isolated were Salmonella Enteritidis (n=309, 94 samples), Salmonella Indiana (n=205, 54 samples) and Salmonella Infantis (n=89, 23 samples). Multidrug-resistant Salmonella isolates were recovered from 100 chicken carcass samples; 102 isolates (from 41 chicken carcasses) even showed resistance to both ciprofloxacin and cefotaxime. Our findings showed a high prevalence of Salmonella contamination in retail chicken carcasses, which could be a source of exposure for consumers to multidrug-resistant isolates. This study provided baseline enumeration data for the risk assessment and evaluation of new control measures of Salmonella contamination in retail chicken products.

UI MeSH Term Description Entries
D008460 Meat The edible portions of any animal used for food including cattle, swine, goats/sheep, poultry, fish, shellfish, and game. Meats
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D002681 China A country spanning from central Asia to the Pacific Ocean. Inner Mongolia,Manchuria,People's Republic of China,Sinkiang,Mainland China
D003257 Consumer Product Safety The sum total of measures taken and regulatory policies enacted to ensure the safe use of consumer products. Safety, Consumer Product,Product Approval,Product Approvals,Product Safety, Consumer
D005506 Food Contamination The presence in food of harmful, unpalatable, or otherwise objectionable foreign substances, e.g. chemicals, microorganisms or diluents, before, during, or after processing or storage. Food Adulteration,Adulteration, Food,Adulterations, Food,Contamination, Food,Contaminations, Food,Food Adulterations,Food Contaminations
D005516 Food Microbiology The presence of bacteria, viruses, and fungi in food and food products. This term is not restricted to pathogenic organisms: the presence of various non-pathogenic bacteria and fungi in cheeses and wines, for example, is included in this concept. Microbiology, Food
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012477 Salmonella enteritidis A serotype of Salmonella enterica which is an etiologic agent of gastroenteritis in man and other animals. Salmonella enterica serovar enteritidis
D012703 Serotyping Process of determining and distinguishing species of bacteria or viruses based on antigens they share. Serotypings
D015169 Colony Count, Microbial Enumeration by direct count of viable, isolated bacterial, archaeal, or fungal CELLS or SPORES capable of growth on solid CULTURE MEDIA. The method is used routinely by environmental microbiologists for quantifying organisms in AIR; FOOD; and WATER; by clinicians for measuring patients' microbial load; and in antimicrobial drug testing. Agar Dilution Count,Colony-Forming Units Assay, Microbial,Fungal Count,Pour Plate Count,Spore Count,Spread Plate Count,Streak Plate Count,Colony Forming Units Assay, Microbial,Colony Forming Units Assays, Microbial,Agar Dilution Counts,Colony Counts, Microbial,Count, Agar Dilution,Count, Fungal,Count, Microbial Colony,Count, Pour Plate,Count, Spore,Count, Spread Plate,Count, Streak Plate,Counts, Agar Dilution,Counts, Fungal,Counts, Microbial Colony,Counts, Pour Plate,Counts, Spore,Counts, Spread Plate,Counts, Streak Plate,Dilution Count, Agar,Dilution Counts, Agar,Fungal Counts,Microbial Colony Count,Microbial Colony Counts,Pour Plate Counts,Spore Counts,Spread Plate Counts,Streak Plate Counts

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