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Prevalence of virulence and extended‐spectrum β‐lactamase (ESBL) genes harbouring Vibrio spp. isolated from cockles ( Tegillarca granosa ) marketed in Korea
Author(s) -
Dahanayake P.S.,
Hossain S.,
Wickramanayake M.V.K.S.,
Heo G.J.
Publication year - 2020
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/lam.13232
Subject(s) - biology , microbiology and biotechnology , vibrio parahaemolyticus , ampicillin , virulence , vibrio alginolyticus , vibrio , antibiotics , gene , bacteria , genetics
The present study aimed to investigate the incidence, virulence and antibiotic properties in Vibrio spp. isolated from cockles ( Tegillarca granosa ) marketed in Korea. A total of 32 Vibrio spp. isolates including V. parahaemolyticus ( n = 4), V. alginolyticus ( n = 11), V. diabolicus ( n = 14) and V. harveyi ( n = 3) were detected using gyrB sequencing. The phenotypic pathogenicity revealed that the DNase, amylase and phospholipase activities were 100%, while lipase, slime production, gelatinase and caseinase were detected in 72, 88, 88 and 81% of the isolates respectively. The PCR amplification for the detection of V. parahaemolyticus species‐specific tdh , tlh , trh and toxR genes were positive in 4 (13%), 16 (50%), 0 (0%) and 4 (13%) isolates respectively. The V. alginolytuicus species‐specific tdh , tlh , trh , toxR and vac genes were carried by 15 (47%), 29 (91%), 0 (0%), 15 (47%) and 25 (78%) of the isolates respectively. In addition, multidrug resistance was observed by 27 (84%) isolates, whereas higher resistant rates were observed against ampicillin, piperacillin, streptomycin and cephalothin. The occurrence of bla CTX (78%), bla TEM (40%), bla SHV (22%) and aac ( 6’ ) ‐Ib (94%) were prevalent, while strAB , tetB , aphAI‐IAB , intl1 and aadA1 gene cassettes were also detected. The results signify the potential health risks resulting from the consumption of raw cockles in Korea. Significance and Impact of the Study Vibrios are well known to cause human infections following consumption of raw or undercooked seafood. This phenomenon has undoubtedly increased the number of health issues over the past few years in Korea. Among the identified Vibrio spp., we could detect V. diabolicus and V. harveyi for the first time in marketed cockles in Korea. The presence of species‐specific genes ( tdh‐VA, tlh‐VP, tlh‐VA and toxR‐VA ) in V. diabolicus exhibits the close genetic affinity among V. parahaemolyticus and V. alginolyticus . Furthermore, the prevalence of extended‐spectrum β‐lactamases (ESBLs) and other antibiotic resistance genes along with multidrug resistance signifies the potential threat for consumers.