Detection of putative Salmonella enterica in retail chicken egg from a selected public market in the City of Manila

Angela Nicole M Mananghaya; Zepha Marie M Caalim; Noreen Joy C Garces; Gabrielle V Larin; Anna Dominique Z Sasil; Maria Margarita M Lota

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Detection of putative Salmonella enterica in retail chicken egg from a selected public market in the City of Manila

Author: Angela Nicole M. Mananghaya ¹ ; Zepha Marie M. Caalim ² ; Noreen Joy C. Garces ³ ; Gabrielle V. Larin ⁴ ; Anna Dominique Z. Sasil ⁵ ; Maria Margarita M. Lota ⁶
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1. College of Medicine, University of the Philippines Manila, Manila, Philippines
2. College of Medicine, St. Lukes Medical Center, Quezon City, Philippines
3. College of Medicine, University of Santo Tomas Faculty of Medicine and Surgery, Sampaloc, Manila, Philippines
4. National Center for Mental Health, Mandaluyong, Philippines
5. Department of Science and Technology, Taguig City, Philippines
6. Department of Medical Microbiology, College of Public Health, University of the Philippines Manila, Manila, Philippines
Publication Type:Other Types
Keywords: Salmonella enterica serotypes; Chicken eggs; Public market
MeSH: Salmonella
From: Philippine Journal of Health Research and Development 2022;26(1):58-63
CountryPhilippines
Language:English
Abstract: Background:Salmonellosis is one of the most reported bacterial foodborne illnesses worldwide. Salmonella outbreaks are also prevalent in the Philippines, with egg-containing food and feces of chicken as implicated sources. The presence of Salmonella in eggshells and in egg content poses a significant threat to public health. Hence, this study aimed to determine the presence of S. enterica from different parts of chicken eggs sold in a public market in the City of Manila.
Methodology:A descriptive study design was employed to detect the presence of Salmonella spp. in different parts of retail chicken eggs. A total of 72 egg samples from 24 stalls were included. The methodology for isolation and identification of Salmonella followed the guidelines set by the US Food and Drug Administration as seen in the Bacteriological Analytical Manual with some additions and modifications.
Results:Contaminated eggs were found in 21 (87%) of the 24 stalls. A total of 29 (40%) out of 72 eggs were identified as the source of putative Salmonella isolates. Nineteen (66%) eggs had putative Salmonella isolates from the eggshell, while 7 (24%) had putative Salmonella isolates from the egg content. There were three (10%) eggs with both eggshell and egg content possibly contaminated with Salmonella.
Conclusion:The presence of putative Salmonella and Enterobacteriaceae highlight the need to strengthen food safety at the production and distribution levels of retail chicken eggs. There is also a need to establish a national surveillance system along with strengthened diagnostic capacity for S. enterica in the Philippines.
Full text:592-1447-1-SM.pdf