The way our bodies react to mosquito saliva motivates us to avoid being bitten. Which must have had evolutionary benefits, keeping us away from diseases.
I.e. all those people that didn’t mind them and never got itchy from mosquito bites appear to have died out. And mosquitoes really wish that wasn’t true.
Interesting, I never thought about this. It makes sense. Early peoples definitely took measures to reduce bites. Burning specific plants that repel them. Slathering their skin with mud, clay, or oils. Crafting mosquito resistant clothing and bedding. For thousands of years before germ theory.
While mosquito bites are unpleasant in themselves due to the itching and swelling I don’t think it’s common for cultures to have worked out the causal relationship between mosquitos and diseases like malaria. But I’d be happily educated otherwise.
Well the point is that people who had a bad reaction to mosquito bites tend to avoid getting them. Therefore they tend to live longer because they also happen to avoid the diseases, live longer and have more babies. They don’t need to understand anything.
The point is that the itching evolved because it could be beneficial for us. The bites are not unpleasant in themselves as you say. They are unpleasant because we evolved to feel them unpleasant. It is the same as sex being pleasant. It is that way because it is beneficial.
Biting insects kill more people than any other animal group by miles, the reaction response is more or less the same in every mammal. Evolution doesn’t evolve to anything, that’s selective pressure.
This behavior predates humans as we know ourselves today.
Biting insects kill more people than any other animal group by miles
I take issue with this obvious selection bias. Of course this is true when you’re pre-selecting for only the insects that bite people. If you were to preselect only those sharks that have bitten people, so-called biting sharks, I think the shark-bitten people have a higher average early mortality than the insect-bitten people. /s
Just my two cents, but if you see John getting bitten and then getting sick, and you see Mary getting bitten and then getting sick, you’re probably going to think “Gee, seems like people get sick of those bites. Better cover my skin, huh?”
I’m pretty sure people have connected the two. While it may not seem like it on a day to day basis, people are pretty smart when there’s enough of them and you give it some time.
I agree. It might take one person a long time to figure that out, if ever, but when you’ve got a few thousand or a few tens of thousands of people, and like 10,000 years, you can narrow it down.
Female mosquitos (male ones don’t bite) inject their saliva in order to get as much blood out as quickly as possible. The saliva contains an anticoagulant to prevent clotting. Most people are allergic to some proteins in mosquito saliva, which triggers the immune system to send in histamines. One of the things those histamines do is to dilate blood vessels, allowing for white blood cells to get to the area more quickly. Dilated blood vessels help the mosquito to get more blood.
So there might be a benefit to mosquitos from their bites causing that itching, because of the dilated blood vessels that come first.
I read that if you see a mosquito biting you and you can resist the urge to swat her until she’s done, you’ll have less itch because she’ll have sucked most of her saliva back out with the blood. But I haven’t tried it
Actually what you’ve got to do is pinch the skin around it, trapping its mouthparts, and violently blasting blood inside it until it’s too fat to fly.
Nothing a little heat doesn’t solve. If you dont have a heat wand for moz bites, you are missing out.
What’s that now?
I don’t get itchy from mosquito bites. 🤔
Witch.
Someone on Lemmy theorized that I simply have a shit immune system.
WitchWhich may be accurate.
