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  • Title: Occurrence, virulence gene and antimicrobial susceptibility profiles of Arcobacter sp. isolated from catla (Catla catla) in India.
    Author: Nelapati S, Tumati SR, Thirtham MR, Ramani Pushpa RN, Kamisetty AK, Ch BK.
    Journal: Lett Appl Microbiol; 2020 May; 70(5):365-371. PubMed ID: 32012305.
    Abstract:
    In the present study, a total of 100 catla (Catla catla-major South Asian carp, local name botcha) collected from local fish markets and aquaculture ponds were subjected for isolation and characterization of Arcobacter sp. In all, 21 Arcobacter sp. were isolated, of which 18 (85·7%) were Arcobacter butzleri and three (14%) were A. cryoaerophilus as identified by multiplex PCR. All 18 A. butzleri isolates were positive for mviN, ciaB and tlyA virulence genes, three of A. cryoaerophilus isolates carried mviN gene and none of the isolates were positive for cadF, irgA, cj1349, hecA and hecB genes. All isolates (n = 21) were resistant to penicillin (100%). Meanwhile, 71·43, 23·81, 23·81, 14·29 and 9·52% of the isolates showed resistance towards vancomycin, nalidixic acid, erythromycin, cefixime and kanamycin, respectively. Multidrug resistance was observed in 23·81% of the Arcobacter sp. isolates and none of the isolates were positive for any of the extended spectrum beta-lactamases either by phenotypic or by molecular identification genes (blaOXA , blaSHV , blaTEM , blaCTX-M1 , blaCTX-M2 and blaCTX-M9 groups). The results emphasize the need to implement specific control procedures to reduce the use of antibiotics in aquaculture particularly the ones which are very important in human medicine. SIGNIFICANCE AND IMPACT OF THE STUDY: Arcobacter species are emerging food- and water-borne human pathogens. In this study, Arcobacter butzleri was predominant in fish compared to A. cryoaerohilus and A. skirrowii. Higher incidence of arcobacters in fish market samples suggests cross contamination and unhygienic handling of fish in markets. Virulence genes profile and antibiotics resistance of the Arcobacter sp. isolated in current study indicate pathogenic potential of Arcobacter sp. to humans. Occurrence of multidrug-resistant Arcobacter sp. in fish is a major concern in food safety. To our knowledge, this is the first report of Arcobacter sp. from freshwater fish, catla (Catla catla) in India.
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