this post was submitted on 22 Aug 2024
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Showerthoughts

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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.

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[–] Nougat@fedia.io 65 points 2 years ago (1 children)

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.

[–] NoSpotOfGround@lemmy.world 1 points 2 years ago

I understand the saliva has a benefit for mosquitoes, but not the swelling and the itching (the "unpleasantness" in the title). In essence, our bodies hung this not-otherwise-useful allergic response on something the mosquitoes couldn't/wouldn't/didn't give up and which was firmly specific to their bites, to single them out.

If there was no saliva our bodies would be pressured by natural selection to pick some other mechanism to make their bites unpleasant. An allergy to their chitin or a phobia to the sound of their wings, etc.

Evolutionary pressure from mosquitoes has probably been no small thing.

[–] SharkEatingBreakfast@sopuli.xyz 13 points 2 years ago (1 children)

I don't get itchy from mosquito bites. 🤔

[–] Iheartcheese@lemmy.world 27 points 2 years ago (2 children)
[–] SharkEatingBreakfast@sopuli.xyz 2 points 2 years ago

Someone on Lemmy theorized that I simply have a shit immune system. ~~Witch~~ Which may be accurate.

[–] Mouselemming@sh.itjust.works 6 points 2 years ago (2 children)

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

[–] Geth@lemmy.dbzer0.com 28 points 2 years ago (1 children)

That would mean when they bite you during the night when they can take their sweet time, you would wake up with no itchiness, but that's not the case for me.

[–] Plopp@lemmy.world 9 points 2 years ago (1 children)

Maybe the nighttime suckers are kinky bastards who deliberately hock a loogie in you before they leave.

[–] matti@sopuli.xyz 3 points 2 years ago

The huck tuah mozzies

[–] JustZ@lemmy.world 0 points 2 years ago

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.

[–] fmstrat@lemmy.nowsci.com 1 points 2 years ago (1 children)

Nothing a little heat doesn't solve. If you dont have a heat wand for moz bites, you are missing out.

[–] dohpaz42@lemmy.world -2 points 2 years ago (3 children)

I disagree because the reaction to a mosquito bite is an after effect of being bitten. By the time you realize you’ve been bitten, it’s too late. Any damage is already done. It’s also difficult to see mosquitoes, as they are small. Similar to ticks, they do not usually trigger a sensation that you would feel. The best you could hope for is to recognize and correlate the itchiness with the locations you visit, and learn to stay away from that area at certain times.

[–] Cadeillac@lemmy.world 20 points 2 years ago (1 children)

Hey, you kind of figured it out by the end. The people that stay away from those areas to prevent being bitten will also avoid disease whether that was their intention or not

[–] Brkdncr@lemmy.world 7 points 2 years ago

I was rooting for them the whole way.

[–] sinkingship@mander.xyz 11 points 2 years ago (2 children)

I disagree. I live in mosquito land and get bitten a lot. I'd say the majority of mosquitos biting me, I feel when they land, before they bite. Probably half of those I can either slap or miss and they take off again and try again. There are some spots though where I don't feel them land. The annoying ones are those I feel touching me but they don't land, they just fly around. Those are hard to slap.

Unrelated question: does anybody happen to know if the biting time matters for transmitting disease?

2 mosquitos died on me while typing out this comment.

[–] dohpaz42@lemmy.world 4 points 2 years ago (1 children)

Maybe my mosquitos are different than yours (just looked, and there are 3600 different kinds). Usually when I take my dog out so she can “commune with nature”, I’ll end up getting bit two or three times by mosquitos. I never feel them at all, except for the itchy bumps after the fact. Could be me. I only ever get bit on my legs/ankles.

As for bite time, I don’t think it’s the length of time the mosquito feeds, but the act of breaking skin and feeding. The malaria parasite will cause the mosquito to bite over and over again, which probably increases the infection rate.

[–] sinkingship@mander.xyz 4 points 2 years ago* (last edited 2 years ago) (2 children)

Maybe they are different. I live in Asia. From what I heard there are many mosquito species, but the majority not blood sucking or at least not human blood sucking. Only few species carry disease, if I recall correctly.

To be fair, when I'm preoccupied, I also don't feel them always. Or I feel them but my hands are busy, so I can't slap them. I often have this at night, when I'm playing PC games and my feet get stung up. It'll be like "ouch, my foot! Gotta slap that mosquito, but first I finish this in game. And then this." Procrastinating until it's too late.

I believe ankles are prime for them due to thin skin.

One mosquito died, writing this comment.

[–] dubyakay@lemmy.ca 3 points 2 years ago

You need a net. Or some kinda natural deterrent.

[–] dohpaz42@lemmy.world 0 points 2 years ago (2 children)

I haven’t tried it myself, but I’ve heard coffee grounds are a good mosquito repellent. If you have access to essential oils, you should also look into citronella oil too.

Keep up the good fight!

[–] sinkingship@mander.xyz 2 points 2 years ago

I use mosquito coils, they are very effective.

I also have an electric bat, although it's more for the phycho fun of killing than helping reducing bites. They are just too many.

I tried lemongrass as a natural deterrent but had the impression it made no difference.

What works best for me is: slapping those you can while not caring about the rest. Because once you start to scratch it's a vicious cycle, so I don't touch stings and usually then forget about them shortly after.

[–] southsamurai@sh.itjust.works 1 points 2 years ago

That site is cancer lol.

It isn't wrong, but holy crap is it badly done

[–] lord_ryvan@ttrpg.network 3 points 2 years ago

Mosquito land? Sounds awful! Where is it? So I can avoid it, of course.

[–] Geth@lemmy.dbzer0.com 3 points 2 years ago

I literally swatted a mosquito the other day because it bit me while I was doing something else. I didn't feel it land, but I did feel the bite which triggered me to slap it out of existence.

[–] MissJinx@lemmy.world -2 points 2 years ago (3 children)

...motivates us to avoid being bitten...

nobody ever went "well let's get bitten by this other species and see what's up" lol I think all types of bites are avoided as a standard, you don't need to be movitated to it

[–] rockerface@lemm.ee 4 points 2 years ago

Yeah but if it wasn't itchy most mosquito bites would just go unnoticed

[–] illi@lemm.ee 3 points 2 years ago

My grandpa didn't mind the bites. He would chill in the garden with 5 or more of the fuckers on him and let them have at it, conciously.

[–] Fizz@lemmy.nz 2 points 2 years ago

Coyote Peterson