PHENOTYPIC AND GENOTYPIC CHARACTERIZATION OF LISTERIA MONOCYTOGENES ISOLATED FROM RAW MILK IN ASSIUT CITY
GERGIS, A., HAFEZ, M., MOHAMMED, Z., HASSAN, A. (2024). PHENOTYPIC AND GENOTYPIC CHARACTERIZATION OF LISTERIA MONOCYTOGENES ISOLATED FROM RAW MILK IN ASSIUT CITY. EKB Journal Management System, 70(181), 232-243. doi: 10.21608/avmj.2024.253310.1209
AMAL ISHAK GERGIS; MARY REFAT HAFEZ; ZEINAB AHMED MOHAMMED; AZHAR MOHAMMED HASSAN. "PHENOTYPIC AND GENOTYPIC CHARACTERIZATION OF LISTERIA MONOCYTOGENES ISOLATED FROM RAW MILK IN ASSIUT CITY". EKB Journal Management System, 70, 181, 2024, 232-243. doi: 10.21608/avmj.2024.253310.1209
GERGIS, A., HAFEZ, M., MOHAMMED, Z., HASSAN, A. (2024). 'PHENOTYPIC AND GENOTYPIC CHARACTERIZATION OF LISTERIA MONOCYTOGENES ISOLATED FROM RAW MILK IN ASSIUT CITY', EKB Journal Management System, 70(181), pp. 232-243. doi: 10.21608/avmj.2024.253310.1209
GERGIS, A., HAFEZ, M., MOHAMMED, Z., HASSAN, A. PHENOTYPIC AND GENOTYPIC CHARACTERIZATION OF LISTERIA MONOCYTOGENES ISOLATED FROM RAW MILK IN ASSIUT CITY. EKB Journal Management System, 2024; 70(181): 232-243. doi: 10.21608/avmj.2024.253310.1209

PHENOTYPIC AND GENOTYPIC CHARACTERIZATION OF LISTERIA MONOCYTOGENES ISOLATED FROM RAW MILK IN ASSIUT CITY

Assiut Veterinary Medical Journal
Article 19, Volume 70, Issue 181, April 2024, Page 232-243  XML PDF (887.66 K)
Document Type: Research article
DOI: 10.21608/avmj.2024.253310.1209
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Authors
AMAL ISHAK GERGIS1; MARY REFAT HAFEZ1; ZEINAB AHMED MOHAMMED2; AZHAR MOHAMMED HASSAN email 1
1Animal Health Research Institute, Assiut Branch
2Animal Health Research Institute, Luxor Branch
Abstract
Among a food-associated pathogen, Listeria monocytogenes has become the most important one. It can cause a "high fatality rates 20–30%" in comprasion to another foodborne bacteria which causing dangerous disease called listeriosis. Listeria outbreaks are often linked to dairy products and milk. This article intends to review phenotypic and genotypic characters of L. monocytogenes in Assiut city. How common L. monocytogenes is determined in different sources of raw milk (20 market milk, 40 buffleo milk and 40 cow milk).  By detection of 3 virulence genes and its sequencing (hlyA, inIB and (prfA) can deterimined the pathogenic potential of the isolates. Firstly enrichment samples in fraser broth, then, plating on to ALOA®, Merck. Finally a multiplex-PCR,was used for identification of suspected colonies. The results revealed that 8 (40%), 6 (15%) and 11 (27%) of samples that collected from market, buffalo and cow raw milk were positive respectively. Antibacteerial sensitive test showing in vitro thai Listeria mmonocytogenes had a higher sensitivity to Sulfa methoxazoletrimthoprim (SXT) and Ciprofloxacin, (CIP) followed by Chloramphenicol (C), low sensitive to  Gentamicin (CN), it resisted Erythrommycin (E) and Amoxicillin (AX). The PCR results for isolates have hly A Inl B and prf A genes of L. monoctogenes.
Keywords
raw milk PCR; L. monocytogenes hly A; Inl B and prf A.genes
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