Результаты (
английский) 2:
[копия]Скопировано!
Parasites are spread by water, air, and deposited on the food items, and excreted into the environment, they fall through feces as a so-called cysts (within the containment that protects against the adverse conditions). The main transmission medium - water. Cysts can withstand low temperature and chlorination of them save, perhaps, boiling or special filtering system.
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