Document Type : Original Article

Authors

1 Medical Microbiology Department, College of Health Sciences, Hawler Medical University, Erbil, Iraq

2 Biology Department, College of Science, Salahaddin University-Erbil, Erbil, Iraq

3 Fish Recourses and Aquatic Animals Department, College of Agriculture Salahaddin University, Erbil, Iraq

10.29252/pmj01027

Abstract

Salmonella is a group of Gram-negative rod shaped bacteria belongs to the Enterobacteriaceae family, 2,500 serotypes have been defined for Salmonella, are associated with 1.3 billion cases of gastroenteritis and 3 million deaths worldwide. For diagnosis of Salmonella spp. 100 vegetable samples was collected from four types of green leaves (Arugula, Leek, Celery and Cress) during February to April 2018, and then examined by cultural method using tow enrichment broth,. Afterward, Salmonella spp. were detected by PCR using Inv-A gene (796 bps). In this investigation, microbiological methods and molecular methods had been used for the diagnosis of Salmonella spp. Combination of both methods confirmed contamination of thirty samples which showed abnormal range for the contamination of vegetables in Erbil province. The present study concluded that both traditional and molecular based techniques like PCR are complementary. In this study, PCR study was carried out to determine the prevalence of Salmonella spp. at the level of Inv-A gene from vegetables, where microbiological findings were combined with the PCR results.

Keywords

1.Siddiq M, Uebersax MA. Handbook of Vegetables and
Vegetable Processing: Wiley Online Library; 2018.
2. Weldezgina D, Muleta D. Bacteriological Contaminants of
Some Fresh Vegetables Irrigated with Awetu River in Jimma
Town, Southwestern Ethiopia. Adv Biol. 2016;2016:1-11. doi:
10.1155/2016/1526764
3. González-Mendoza D, Torrentera-Olivera N, Duran CC,
Grimaldo-Juarez O. Water as contamination source of
Salmonella and Escherichia coli in vegetable production in
Mexico: A review. Revista Bio Ciencias. 2015;3(3):156-62.
4. Stevens KA, Sheldon BW, Klapes NA, Klaenhammer TR. Nisin
treatment for inactivation of Salmonella species and other
gram-negative bacteria. Appl Environ Microbiol.
1991;57(12):3613-5. pmid: 1785933
5. Miller S. Salmonella species, including almonella typhi:
Preinciples and practice of infectious diseases; 2000. 2344-63
p.
6. Widyasmara A, Malik A, Radji M. Rapid detection of
Salmonella in food and beverage samples by polymerase chain
reaction. Malaysia J Microb. 2010;6(2):166-70. doi:
10.21161/mjm.20009
7. Glassing A, Dowd SE, Galandiuk S, Davis B, Chiodini RJ.
Inherent bacterial DNA contamination of extraction and
sequencing reagents may affect interpretation of microbiota in
low bacterial biomass samples. Gut Pathog. 2016;8:24. doi:
10.1186/s13099-016-0103-7 pmid: 27239228
8. Fratamico PM, Strobaugh TP. Simultaneous detection of
Salmonella spp and Escherichia coli O157:H7 by multiplex
PCR. J Indust Microb Biotech. 1998;21(3):92-8. doi:
10.1038/sj.jim.2900520
9. Kusters JG, Reuland EA, Bouter S, Koenig P, Dorigo-Zetsma
JW. A multiplex real-time PCR assay for routine diagnosis of
bacterial vaginosis. Eur J Clin Microbiol Infect Dis.
2015;34(9):1779-85. doi: 10.1007/s10096-015-2412-z pmid:
26143346
10. Heymans R, Vila A, van Heerwaarden CAM, Jansen CCC,
Castelijn GAA, van der Voort M, et al. Rapid detection and
differentiation of Salmonella species, Salmonella
Typhimurium and Salmonella Enteritidis by multiplex
quantitative PCR. PLoS One. 2018;13(10):e0206316. doi:
10.1371/journal.pone.0206316 pmid: 30359449
11. Lee K-M, Runyon M, Herrman TJ, Phillips R, Hsieh J. Review
of Salmonella detection and identification methods: Aspects of
rapid emergency response and food safety. Food Control.
2015;47(2):264-76. doi: 10.1016/j.foodcont.2014.07.011