This study suggests that coolants used in HTST pasteurizers may serve as a reservoir for bacterial contamination of pasteurized milk. The use of sanitizer in dairy coolant was not associated with low microbial populations in the coolant samples. Salmonella typhimurium was isolated from one sweet water sample using the filtration procedure. Read Expedias guide to find out everything you need to know about visiting Arambol Sweet Water. Eight samples had coliform MPN values >2.2/100 ml of coolant. Explore Arambol Sweet Water Lake when you travel to Arambol. When present, coliforms were usually at low levels. MPN values ranged from 240/100 ml of coolant. The population of organisms that grew at 10 and 37☌ varied greatly from plant to plant. ( 17) was used to examine each sample for the presence of listeria. The previously described procedure for the detection of salmonellae was used. The fifth day of action was supposed to be Monday in the 2022 Tennessee Dixie Youth Division 1 12U-Ozone State Tournament. In addition, 5 L of each sample were passed through 0.45 μm filters (Millipore). MPN vessels positive for growth at 37☌ were used to inoculate selective enrichment, differential and biochemical confirmation media for salmonellae, and brilliant green bile broth (BGB, Difco) for enumeration of coliforms. Samples were incubated for 7 d at 10☌ or for 48 h at 37☌. A modified most probable number (MPN) technique was performed using 333 ml of coolant in lactose broth (LB, Difco). Sweet water and glycol coolants from 68 fluid milk plants were sampled to determine the incidence of psychrotrophs, mesophiles, coliforms, and salmonellae. This study was carried out to determine the incidence of bacteria in these cooling systems. Refrigerated water and water/glycol mixtures used in high temperature short time (HTST) pasteurizers have been implicated as potential sources of spoilage and pathogenic bacteria in milk.
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