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Post-pasteurization contamination with Pseudomonas spp. represents an important contributor to the spoilage of dairy products. Therefore, testing final product for the presence of Pseudomonas spp. is critical to ensuring the quality and increasing the shelf life of pasteurized dairy products. We examined the efficiency of 5 different selective media and 2 incubation times for the detection of Pseudomonas spp. from milk. Our results indicated that (1) commonly used gram-negative selective media showed differences in detection of Pseudomonas spp. in milk, (2) incubation of selective agar for 48 h after plating is required for reliable detection of Pseudomonas spp. from milk, and (3) different Pseudomonas isolates differed in their abilities to grow on selective media.
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