Prevalence of Campylobacter spp., Salmonella spp., and Listeria monocytogenes, and Population Levels of Food Safety Indicator Microorganisms in Retail Raw Chicken Meat and Ready-To-Eat Fresh Leafy Greens Salads Sold in Greece
Author:
Kostoglou Dimitra1, Simoni Maria1, Vafeiadis Georgios1, Kaftantzis Nikolaos-Marios1, Giaouris Efstathios1ORCID
Affiliation:
1. Laboratory of Food Microbiology and Hygiene, Department of Food Science and Nutrition, School of the Environment, University of the Aegean, 81400 Myrina, Lemnos, Greece
Abstract
The presence of microbial pathogens in foods compromises their safety resulting in foodborne illnesses, public health disorders, product recalls, and economic losses. In this work, 60 samples of chilled raw chicken meat and 40 samples of packaged ready-to-eat (RTE) fresh leafy greens salads, sold in Greek retail stores (butchers and supermarkets), were analyzed for the presence of three important foodborne pathogenic bacteria, i.e., Campylobacter spp., Salmonella spp., and Listeria monocytogenes, following the detection protocols of the International Organization for Standardization (ISO). In parallel, the total aerobic plate count (APC), Enterobacteriaceae, total coliforms, Escherichia coli, and staphylococci were also enumerated as hygiene (safety) indicator organisms. When present, representative typical colonies for each pathogen were biochemically verified, following the ISO guidelines. At the same time, all the Campylobacter isolates from chicken (n = 120) were identified to the species level and further phylogenetically discriminated through multiplex and repetitive sequence-based (rep) polymerase chain reaction (PCR) methods, respectively. Concerning raw chicken, Campylobacter spp. were recovered from 54 samples (90.0%) and Salmonella spp. were recovered from 9 samples (15.0%), while L. monocytogenes was present in 35 samples (58.3%). No Campylobacter was recovered from salads, and Salmonella was present in only one sample (2.5%), while three salads were found to be contaminated with L. monocytogenes (7.5%). The 65% of the Campylobacter chicken isolates belonged to C. jejuni, whereas the rest, 35%, belonged to C. coli. Alarmingly, APC was equal to or above 106 CFU/g in 53.3% and 95.0% of chicken and salad samples, respectively, while the populations of some of the other safety indicators were in some cases also high. In sum, this study unravels high occurrence percentages for some pathogenic and food safety indicator microorganisms in raw chicken meat and RTE fresh leafy greens salads sold in Greek retail, highlighting the need for more extensive microbiological control throughout the food production chain (from the farm/field to the market).
Subject
Plant Science,Health Professions (miscellaneous),Health (social science),Microbiology,Food Science
Reference79 articles.
1. Chlebicz, A., and Śliżewska, K. (2018). Campylobacteriosis, salmonellosis, yersiniosis, and listeriosis as zoonotic foodborne diseases: A review. Int. J. Environ. Res. Public Health, 15. 2. EFSA and ECDC (European Food Safety Authority and European Centre for Disease Prevention and Control) (2022). The European Union One Health 2021 Zoonoses Report. EFSA J., 20, 7666. 3. Mota-Gutierrez, J., Lis, L., Lasagabaster, A., Nafarrate, I., Ferrocino, I., Cocolin, L., and Rantsiou, K. (2022). Campylobacter spp. prevalence and mitigation strategies in the broiler production chain. Food Microbiol., 104. 4. Sun, T., Liu, Y., Qin, X., Aspridou, Z., Zheng, J., Wang, X., Li, Z., and Dong, Q. (2021). The prevalence and epidemiology of Salmonella in retail raw poultry meat in China: A systematic review and meta-analysis. Foods, 10. 5. Williams, M.S., Ebel, E.D., and Nyirabahizi, E. (2021). Comparative history of Campylobacter contamination on chicken meat and campylobacteriosis cases in the United States: 1994–2018. Int. J. Food Microbiol., 342.
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