Ecology

All Listeria species have been isolated from soil, decaying vegetable matter, silage, sewage, water, animal feed, fresh and processed meats, raw milk, cheese, slaughterhouse waste, and asymptomatic human and animal carriers. Because of their widespread occurrence, Listeria species have many opportunities to enter food production and processing environments. Because of their psychrotrophic nature, they are then able to grow in food, even at temperatures such as those of refrigerators.[1,2] Consequently, outbreaks and sporadic cases of listeriosis have been traced to different foodstuffs such as pasteurized milk, cheese, coleslaw, and meat products.[2,3,10] The coexistence of several Listeria species on the same food is not unusual, and often, the incidence of Listeria species other than L. monocytogenes is higher than the incidence of L. monocytogenes itself. Because all Listeria species are potential food contaminants, the presence on foodstuffs of any of these species can be considered as an indicator of their contamination and of the potential presence of L. monocytogenes.[11] However, as the threat to public health posed by contamination of foods by each Listeria species is not similar, it is very important that all of them could be rapidly and reliably detected and identified.

Getting Started With Dumbbells

Getting Started With Dumbbells

The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.

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