1 Outdoor air pollution can cause ongoing throat irritation. Indoor pollution â tobacco smoke or chemicals â also can cause a chronic sore throat. Chewing tobacco, drinking alcohol and eating spicy foods also can irritate your throat.  Muscle strain.
Biosecurity is key to productive aquaculture systems. Biosecurity encompasses all measures designed to prevent diseases from occurring and from spreading by isolating, as much as possible, animal farm populations from external contamination. Recurring or prolonged contact with external environments (water, sediment, wildlife) favors the development of new diseases.
Filtration: 4 Used to measure small quantities of bacteria. â¢ Example: Feca l bacteria in a lake or in ocean water .4 A large sample (100 ml or more) is filtered to retain bacteria.4Filter is transferred onto a Petri dish.4Incubate and count colonies.