The general public may have read the science education, the transmission of AIDS, mentioned that mosquito bites do not transmit AIDS, but what is the specific principle? This is another issue that people are concerned about. In fact, although the mosquito’s long mouth is like a syringe, but the mosquito is unlikely to become a vector of AIDS transmission. The U.S. Centers for Disease Control has clearly reported on this issue after research.
Mosquitoes spread disease, there are two broad modes of transmission: biological and mechanical transmission, so-called biological transmission, refers to the pathogen in the mosquito body through the development, proliferation stage, and then infected to people, such as encephalitis B virus with the blood was inhaled into the mosquito body, the first in its intestinal tract to proliferate, and then migrate to the salivary glands, after the bite spread to people or animals.
HIV in mosquitoes neither develop nor proliferate, so it is impossible to spread through biological means, and mechanical means of transmission, in this way in AIDS is also not feasible. Because the mosquito before sucking blood, first by the saliva tube spit saliva (as a lubricant in order to suck blood), and then by another tube – the esophagus inhaled blood. The inhalation of blood is a one-way, after the inhalation will not be spit out by the esophagus. Some people worry that the residual blood on the mouth of the mosquito may carry the AIDS virus, which can be transmitted to people.
But some studies have found that the amount of residual blood on the mouth of the mosquito is only 0.00004 ml, such as this calculation, to bite 2800 times, the amount of residual blood in order to have enough to cause HIV infection virus. And, when the blood with HIV is inhaled by mosquitoes, HIV in 2-3 days that is digested by the mosquitoes, destruction and completely disappeared. And once the mosquito is full of blood, to be completely digested before it bites people again to suck blood.
Therefore, no matter from which way, the possibility of mosquito transmission of AIDS can be said to be non-existent. So far, no mosquitoes or insect bites have been found to be infected by AIDS reports.