Abstract
The objectives of this study were to isolate, purify and determine host range of lytic bacteriophages infecting foodborne the pathogen Salmonella Typhimurium and S. Enteritidis. River/stream water, sewage, raw foods, wastewater from food processing plants, slaughterhouse and fish farms and water from troughs were used for the screening of bacteriophages. The richest sources in terms of phages infecting S. Typhimurium and Enteritidis were found to be sewage, wastewaters of slaughterhouse, food processing and fisheries and streams. A total of 33 S. Typhimurium and 56 S. Enteritidis phages were isolated and purified from the samples. It was demostrated that host ranges of the isolated phages were quite wide. The numbers of bacteria types inhibited by S. Typhimurium or Enteritidis phages were changed among 1–15 and 1–19, respectively. It was found that 75.8% (25 out of 33) and 83.93% (47 out of 56) of isolated S. Typhimurium or Enteritidis phages formed clear plaques and were capable of lysing at least six or two Salmonella serovars. Beside Salmonella serovars, some S. Typhimurium (15 out of 33, 45.5%) and S. Enteritidis phages (5 out of 56, 8.93%) were also infective against E. coli strains. The host ranges of S. Typhimurium phages were wider than those of S. Enteritidis.
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