Determination of microbiological quality and histamine levels in rainbow trouts (Oncorhynchus mykiss) | Zendy

Aksem Aksoy | Zendy; Çiğdem Sezer | Zendy; Mustafa Atasever | Zendy; Asya Çeti̇nkaya | Zendy; Güven Gülbaz | Zendy

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Determination of microbiological quality and histamine levels in rainbow trouts (Oncorhynchus mykiss)

Author(s) -

Aksem Aksoy,

Çiğdem Sezer,

Mustafa Atasever,

Asya Çeti̇nkaya,

Güven Gülbaz

Publication year - 2022

Publication title -

journal of the hellenic veterinary medical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.186

H-Index - 7

eISSN - 2585-3724

pISSN - 1792-2720

DOI - 10.12681/jhvms.29368

Subject(s) - yersinia enterocolitica , listeria monocytogenes , microbiology and biotechnology , biology , aerobic bacteria , micrococcus , fecal coliform , food science , psychrophile , mesophile , rainbow trout , bacteria , fish <actinopterygii> , water quality , fishery , ecology , genetics

This study aims to determine the microbiological quality and histamine levels of fresh-marketed rainbow trouts (Oncorhynchus mykiss). The total mesophilic aerobic bacteria (TMAB), total psychrophilic aerobic bacteria (TPAB), coliform, fecal coliform, Enterobacteriaceae, Pseudomonas, Staphylococcus-Micrococcus and mold-yeast numbers were detected as 4.24, 4.00, 1.10, 0.17, 1.50, 3.05, 0.28 and 3.82 log10 cfu/g, respectively. Yersinia enterocolitica, Listeria monocytogenes, Escherichia coli O157:H7 and Vibrio spp bacteria were found in 18 (37.5%), 14 (29.1%), 8 (16.6%) and 14 (29.1%) respectively. Twenty-eight out of 51 Listeria isolates (54.9%) were verified through PCR analysis as L. monocytogenes. It was determined that the histamine level in the samples was above the detectable level (>2.5 mg/kg) in 8 of the samples (16.6%)determined using an ELISA method. It was concluded that the detection of foodborne pathogens in fresh-marketed fish samples potentially constitutes a public health hazard.

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