Anonymous
Anonymous asked in Science & MathematicsBiology · 5 months ago

Why do insects carry diseases to infect people with, but they don't get the diseases that they carry?

A mosquito may carry malaria and all sorts of viruses and lethal deadly plaques, they will survive with them but the humans that they bite won't.

A fly carries all sorts of diseases and gives them to their host, but they don't get them themselves, same with dung bugs.

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  • Cowboy
    Lv 6
    5 months ago
    Favorite Answer

    Some insects actually are affected by the infectious organisms they carry but not in the same way as a human disease - they aren't that much like us are the?

    For example, flea vectors of bubonic plague lose the ability to feed because the bacteria block their organs and they will eventually die after unsuccessful yet frantic attempts to feed - they don't get plague but they are affected by the germs. Our organ systems are just too different - and insects are subject to many viruses that never affect humans - we're just physiologically different.

  • Zirp
    Lv 7
    5 months ago

    because they are that different from us, biochemically

  • 5 months ago

    Mosquitoes don't have muscle tissue or the kind of lungs we have.

  • Anonymous
    5 months ago

    Diseases often have a "carrier" species they evolved in that doesn't' harm the host. They need the host to live.

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  • Anonymous
    5 months ago

    Bacteria and viruses have evolved to infect only certain species and their close relatives. To infect a species, the bacteria or virus have to have the right "key" to get into a cell. That is why it is not easy for mammals to be infected by viruses that birds may carry but other birds can be more easily infected. Insects are even more different than mammals, so they are unlikely to be infected by bacteria and viruses that infect us. Dogs and cats are mammals, but they are not susceptible to viruses and bacteria that infect us, and vice versa. OTOH, chimps and gorillas are so closely related to humans that we can easily give them the flu.

  • 5 months ago

    Mosquitos don't process your blood for themselves, they just store and carry it to their eggs

  • Anonymous
    5 months ago

    How do you know they don't? it's not like we are going to worry about mosquitoes having malaria would we that we would spend the time and money trying to determine it?

  • Anonymous
    5 months ago

    Because they do not have the DNA markers humans have for the disease to infect them. A disease must be able to trick the body in such a way it's not recognized by our immune system which would mark it to be destroyed by lymphocytes and to do that it must mimic our DNA.

  • Pearl
    Lv 7
    5 months ago

    cause they got lucky

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