Serotyping and phylogenetic grouping of pathogenic Escherichia coli strains isolated from milk and milk products. | ||
| Benha Veterinary Medical Journal | ||
| Volume 45, Issue 1, October 2023, Pages 227-230 PDF (1016.63 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/bvmj.2023.222599.1681 | ||
| Authors | ||
| Aya Mamdouh Rizq* 1; Zeinab Mahdy* 2; Enas Soliman* 1 | ||
| 1Bacteriology, Immunology and Mycology Dept., Fac. Vet. Med., Benha University, Egypt. | ||
| 2Bacteriology Department, Animal Health Research Institute, Agriculture Research Center (ARC), Egypt | ||
| Abstract | ||
| Escherichia coli represents as one of gut microflora of worm- blooded animals that distributed widely. This bacterium attributed into 4 phylogenetic groups A, B1, B2 and D that differ from each other’s in their virulence and disease caused by them. The current study examined the serotyping of E. coli strains isolated from milk and milk products with investigation of their phylogenetic grouping. Eight strains isolated from raw milk, Kariesh cheese, feta (white) cheese, and Ice cream (two strains from each product) were examined serologically by rapid diagnostic E. coli antisera sets and the result showed the presence of three serotypes O114:K90 (two strains), O128:K67 (three strains) and O55:K59 (three strains). Their phylogenetic grouping came out triplex PCR depend on the amplification of chuA, yjaA, and the DNA fragment of TspE4.C2. It showed that six strains belonged to the B2 group, and two strains belonged to D group based on the presence or absence of these genes. | ||
| Keywords | ||
| Escherichia Coli; milk and milk products; phylogenetic analysis | ||
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