Summer mosquito bites pig, have serious harm?

In spring, summer and autumn, whenever the mildew comes, mosquitoes are extremely active. Mosquitoes like hot and cold. They begin to bite people at 16: 17 ℃ and 23: 29 ℃ for their suitable living temperature. Mosquitoes like dark, afraid of light and are used to moving in dark environments. Mosquitoes like places with water very much, so there is no doubt that the farm has become the busiest place for mosquitoes. The harm of mosquitoes to human beings and animals is mainly harassment and stinging, as well as the spread of diseases, as well as the sleep of livestock are greatly affected. When infected, it shows an acute process, livestock emaciation, malnutrition, rising body temperature, slow movement, and later severe anemia. Die of exhaustion. Chronic diseased animals show dyspepsia, stunted growth, and often become dwarf cattle. Diseased cattle have loss of appetite, dysentery, fecal mucus, blood, and even massive mucous membranes, fishy stench and acute weight, even prolapse of the anus, cirrhosis, ascites, deep sinking between shoulder blades, stiffness of forelimbs, hoarseness and dyspnea, can cause severe nerve disturbance, especially nasal tenderness, forced exercise, epilepsy, visual disturbance and acute encephalitis, and sometimes sudden death. Diseases that may be transmitted by mosquito bites-Streptococcus suis-diarrhea of live animals-avian influenza-pathogenic microorganisms, introduction of other pathogens, etc., the breeding of diseases will increase the growth cycle of livestock (ranging from 5 to 20 days), resulting in a decrease in the market price of livestock and an increase in costs for farmers (medical expenses for diseased livestock, manpower and material resources). Delayed feeding costs for livestock on the market.