Isolation and identification of salmonella from Tigertooth croaker fish (Otolithes rubber) in Ahvaz market

Salmonellosis is one of the most important zoonoses diseases. Salmonella species are major enteric pathogens that cause of gastroenteritis and fatal septicemia in human. Salmonella species are known as food borne bacteria because infected of human by foods. Fish and shrimp and other aquatic organisms are very good Resources for these kind of bacteria. These bacteria have been isolated from fresh and processing aquatic foods in the most countries. In this research 60 Tigertooth croaker fish in Ahvaz market were collected and carried to laboratory. Then two different organs include intestines and gills from each fish at sterile condition prepared. For detecting Salmonella after culturing in Lactose Broth, Selenit F and Tetrathionat according to the reference conventional methods, the suspected colonies were inoculated in TSI, Urea and LD agar. Then the serological tests were carried out on suspected colonies. The results showed that 2 (3.3%) samples were contaminated to salmonella. S. enteritidis (B and C serogroups) were detected in the serological tests. These pathogenic bacteria have been contaminated Khouzestan coastal zone through waste water, Chemical industrial and human sources. Therefore, people receive these kind bacteria through consumption of aquatic contaminated foods. In attention to the public health importance of salmonella, more attention should be considered to eliminate the waters contamination by controlling entrance ways.

Keywords:

Salmonella , Tigertooth croaker fish , Ahvaz market