Before disinfection, according to the purpose and use of disinfection, drugs with strong pathogen killing effect, long maintenance time and low toxicity to people and animals can be selected. In addition, the disinfectant should also have the advantages of no damage to articles and instruments, easy solubility in water, low price and convenient use. However, in practical work, it is difficult to choose a disinfectant that fully meets these conditions, and only the appropriate disinfectant can be selected according to the local actual situation.
(2) Pay attention to the factors that affect the disinfection effect.
① Environment and disinfection of livestock and poultry houses. First of all, we should thoroughly clean, rinse and remove organic pollutants such as feces, and the ceiling in the barn should also be cleaned to remove dust and cobwebs, otherwise it will affect the disinfection effect. (2) When disinfecting livestock and poultry, disinfectants with little irritation and low toxicity must be used. The nozzle sprays atomized particles upwards, and the diameter of the sprayed atomized particles should be controlled at 80 ~ 120 micron. It is not allowed to spray disinfection directly on the heads of livestock and poultry to prevent damage to their eyes. Livestock and poultry disinfection can be carried out every 3 ~ 5 days according to the specific situation. (3) The concentration of disinfectant is directly proportional to the disinfection effect, and it must be used at the prescribed concentration, otherwise it will affect the disinfection effect. ④ The drug temperature is also directly proportional to the disinfection effect. Such as hot water and alkaline water. When fumigating with formalin, it is necessary to close the doors and windows, close the gaps, and fumigate continuously for 8 ~ 10 hours without affecting the transfer of animals, then open the doors and windows to discharge the residual drug gas, and then transfer it to animals. ⑤ When disinfecting the drinking water of livestock and poultry, it is not allowed to arbitrarily increase the concentration of disinfectant in the water or let livestock and poultry drink the liquid for a long time, otherwise it may cause acute poisoning, kill or inhibit the normal flora in the intestinal tract, and affect the health of livestock and poultry. Chlorine, iodine and quaternary ammonium salt are commonly used disinfectants for drinking water in production.