Why doesn't AIDS spread through the bite of mosquitos?

Why doesn't the virus multiplicate inside the body of the mosquito??

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  • Anonymous
    1 decade ago
    Favorite Answer

    When a mosquito bites someone, it does not inject its own blood or the blood of an animal or person it has bitten into the next person it bites. The mosquito does inject saliva, which acts as a lubricant so that it can feed more effectively. Yellow fever and malaria can be transmitted through the saliva, but HIV does not reproduce in insects, so the virus doesn't survive in the mosquito long enough to be transmitted in the saliva.

    Additionally, mosquitoes don't normally travel from one person to another after ingesting blood. The insects need time to digest the blood meal before moving on.

    Mosquitoes Digest the Virus that Causes AIDS

    When a mosquito transmits a disease agent from one person to another, the infectious agent must remain alive inside the mosquito until transfer is completed. If the mosquito digests the parasite, the transmission cycle is terminated and the parasite cannot be passed on to the next host. Successful mosquito-borne parasites have a number of interesting ways to avoid being treated as food. Some are refractory to the digestive enzymes inside the mosquito's stomach; most bore their way out of the stomach as quickly as possible to avoid the powerful digestive enzymes that would quickly eliminate their existence. Malaria parasites survive inside mosquitoes for 9-12 days and actually go through a series of necessary life stages during that period. Encephalitis virus particles survive for 10-25 days inside a mosquito and replicate enormously during the incubation period. Studies with HIV clearly show that the virus responsible for the AIDS infection is regarded as food to the mosquito and is digested along with the blood meal. As a result, mosquitoes that ingest HIV-infected blood digest that blood within 1-2 days and completely destroy any virus particles that could potentially produce a new infection. Since the virus does not survive to reproduce and invade the salivary glands, the mechanism that most mosquito-borne parasites use to get from one host to the next is not possible with HIV.

  • 1 decade ago

    When a female mosquito feeds for a blood meal, several things happen. First, a sort of anesthetic is injected, followed by an anticoagulant, both from glands that are separate from the digestive tract. Then, the blood meal is ingested into the gut of the mosquito where enzymes degrade the cells. The blood meal is a prerequisite for the female to lay eggs. In the case of malaria, the parasite is able to actually live and multiply in the mosquito and then travel from the gut to other parts of the anatomy where it can be injected with the anticoagulant and anesthetic from the "salivary glands" of the female. HIV can not survive inside the gut and therefore can not be transmitted from a mosquito bite, even if that same female were to have two successive blood meals (not very common) within a few hours.

  • 1 decade ago

    The AIDS virus is highly specific & requires the T4 lymphocyte blood cell to survive .A mosquito's stomach dosen't have any T4 lymphoctyes,further the digestive juices degenerate the virus present in the sucked infected blood.A malarial parasite (it's sporozoite to be more specific) is not highly specific & also contains a protective layer around itself that prevents it's digestion & hence can be spread by mosquito bites.

  • Anonymous
    1 decade ago

    A mosquito is to small. I dont know how many blood a mosquito can carry but it is too little for an infection.

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  • Jerdy
    Lv 5
    1 decade ago

    That virus is dangerous. But if it not in blood, cannot do harm! In a spit there is unsuficient viruses to create the disease! Sexual contact, nonigienichal thing to touch, the mater of a young baby infested with aids, could spreth the disease!

  • Anonymous
    1 decade ago

    because the HIV virus can survive less than 1 minute outside a human body.

  • 1 decade ago

    Because mosquitoes use a condom when introducing the thingy in your body....

  • 1 decade ago

    I think AIDS dies in air pretty rapidly and it gets exposed to air in the process.

  • 1 decade ago

    How safe is a condom to protect from HIV?

    What is the risk if you have sex two times on one night (two condoms)?

  • 1 decade ago

    because they suck blood not give the blood the took from another person and give it to somebody else!

    to answer your question they dont have an immun system to affect it so!

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