Post Date November, 17 2024
Scientists' research for many years shows that the level of HIV infection is very high in the saliva of people infected with HIV, and there are cells infected with HIV in the mouth of people. According to this analysis, the possibility of HIV infection is high. However, when introducing the ways of transmission of AIDS, almost only three ways of transmission of AIDS are blood, sexual behavior and placenta infection. Why not talk about saliva transmission? This is because many studies have proved that the mechanical barrier effect of the mouth and various HIV inhibitory ingredients in saliva reduce the chances of saliva transmission.
1. Mechanical barrier effect
The completely undamaged oral mucosa can prevent the invasion of various microorganisms (including HIV). Oral saliva has the function of flushing and diluting, which can flush HIV into the stomach and be killed by stomach acid. According to research, oral mucosa can release secreted antibody IgA. After the invasion of AIDS virus, this antibody surrounds the protective part and resists HIV.
3. Suppress multiple HIV components
These effective substances mainly include glycoproteins, defensins, emulsifying enzymes, thromboxanes, salivary proteins, etc.
There are many and complex components in saliva that inhibit HIV. In addition to those known, there may be other substances. Scientists are studying them in depth. In a word, the role of oral mucosa in resisting AIDS virus is an inherent advantage of the human body. This advantage makes the chance of spreading AIDS through oral saliva - kissing very small. Therefore, saliva kissing is generally not the main route of transmission of AIDS virus.
But recent studies have shown that the advantages of the oral cavity are not absolute. Experts used sensitive gene expansion technology (PCR method) to check the saliva of people infected with AIDS virus. The detection rate of HIVRAN (AIDS virus nucleic acid) reached 96%. HIVRAN can almost be detected in the tonsils of infected individuals, and its titer is 100-1000 times that of HIV RNA in the blood. HIVRNA positive indicates that AIDS virus is active and the patient has obvious infectivity. Therefore, no one can completely deny the possibility of saliva transmission of HIV.
In view of this situation, when answering the question "Can kissing spread AIDS?", the correct answer is: social and polite dry kissing, even lip to lip, as long as there is no saliva contact, will not spread AIDS. However, it is unsafe to repeatedly contact with oral secretions of people infected with AIDS. Therefore, frequent kissing with unknown AIDS virus infected persons must be checked.
