Identification of Pathogenic Variations in Seafood Vibrio parahaemolyticus Isolates by Comparing Genome Sequences.
J Food Prot
; 84(7): 1141-1149, 2021 Jul 01.
Article
in En
| MEDLINE
| ID: mdl-33635940
ABSTRACT
ABSTRACT An investigation of the pathogenic characteristics of isolates of Vibrio parahaemolyticus was conducted by identifying the pathogenic tdh gene and then performing adherence and cytotoxicity assays. Genome sequences of the seafood isolates were analyzed using the Illumina HiSeq 2500 platform. The isolated strains were then mapped by comparing the genomes to the reference genome, and variations in the nucleotide sequences and amino acids were identified with the CLC Genomics Workbench program. The tdh gene was identified in four isolates of V. parahaemolyticus, of which three-SMFM201809-CPC7-3, SMFM201809-CF8-2, and SMFM201809-CF8-3-showed high cytotoxicity and differences in cell adhesion. These isolates were selected to identify virulence factors and genomic variations. All three isolates had the same virulence factors, such as adherence, secretion system, and toxin. In addition, amino acid variants were identified in the regions of type IV pilus, T3SS1 and T3SS1 secreted effectors, and thermolabile hemolysin. These results indicate that variations in amino acids found in regions related to adherence and cytotoxicity result in differences in adhesion efficiency and cytotoxicity; therefore, the isolates with these variations may cause more serious foodborne illness compared with other strains.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Vibrio parahaemolyticus
/
Food Contamination
/
Seafood
Type of study:
Diagnostic_studies
/
Prognostic_studies
Language:
En
Journal:
J Food Prot
Year:
2021
Document type:
Article