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Why Mosquitoes Bother Some And Not Others

antipode writes "The BBC reports that scientists may have a better clue why mosquitoes prefer biting some people to others. This may lead to formulating a next generation of mosquito repellent that would suppress the smells attracting the blood sucking insects. According to the article, such repellent would be odor-less by itself. Wonder whether it's going to be more evil than Deet-based repellents, which, while being the only type that actually works, dissolve plastic and are believed by some to be carcinogenic."

61 comments

  1. My wife's preferred method by lambkabobwithfeta · · Score: 1, Funny

    My wife knows mosquitos love me. Whereever she goes, she's safe from mosquitos if I'm nearby.

  2. It's a Natural Repellant by AllMightyPaul · · Score: 5, Informative

    "Wonder whether it's going to be more evil than Deet-based repellents, which, while being the only type that actually works, dissolve plastic and are believed by some to be carcinogenic."

    If the poster actually did read the article, he would have noticed that it says that it's a natural repellant made from chemicals already produced by the body. This leads to a high likelihood that it's not dangerous.

    1. Re:It's a Natural Repellant by Anonymous Coward · · Score: 0, Troll

      Shit is natural too but you don't see people eating it.

    2. Re:It's a Natural Repellant by pr0file · · Score: 1, Funny

      Hmm with this technology its only a matter of time until Thinkgeek start selling canisters of odourless "chick" repellent which can be used discreetly on the overly biggoted and generaly annoying BigManOnCampus.

      I can see the results now... :)

      --
      Tis, brakes that allow cars go fast!
    3. Re:It's a Natural Repellant by irc.goatse.cx+troll · · Score: 0, Troll

      You must not browse the right Websites

      --
      Pain lasts, kid. Its how you know you're alive. Sometimes I think this growing up thing is just pain management-TheMaxx
    4. Re:It's a Natural Repellant by Anonymous Coward · · Score: 0

      They'll be expensive though, they're taking out a patent.

    5. Re:It's a Natural Repellant by Anonymous Coward · · Score: 0

      Just because the body produces the same chemicals does not mean that it is safe to alter it's proportions. How do you determine that you can take just about any chemical naturally produced by the body and alter its proportion without detrimental effect? How are you calculating this "high likelihood"? What if the researchers discovered that the magic cure was insulin?

    6. Re:It's a Natural Repellant by Anonymous Coward · · Score: 0

      Well, flies do.

    7. Re:It's a Natural Repellant by hawkfish · · Score: 1

      This may be a troll (see one of the other responses) but for once it is also funny, insightful and on topic.

      --
      You will not drink with us, but you would taste our steel? - Walter Matthau, The Pirates
    8. Re:It's a Natural Repellant by jonadab · · Score: 2, Insightful

      > it's a natural repellant made from chemicals already produced by the body.
      > This leads to a high likelihood that it's not dangerous.

      Non sequiteur. Ammonia is a natural chemical already produced by the body
      (occurring prominently, for example, in urine), but when a tanker truck
      carrying ammonia spills on the highway, it's an environmental disaster.
      Bile is a natural chemical already produced by the body and is a natural
      emulsifier. Endorphins and human growth hormone and steroids (such as
      testosterone) are natural chemicals already produced by the body. These are
      all quite dangerous chemicals, if used improperly or in the wrong amounts.

      It's all about how much you use and how you use it. The right amount of
      chlorine used correctly makes water safe to drink; the wrong amount used
      improperly will kill you even faster than the bacteria it's saving you from.
      This is just as true for "natural" chemicals as any other kind.

      --
      Cut that out, or I will ship you to Norilsk in a box.
    9. Re:It's a Natural Repellant by ErroneousBee · · Score: 1

      It actually quite common for small herbivores to eat thier own pellets. Rabbits need to pass grass through the system twice to break down the celulose. Ive seen carnivours (dogs mostly) do it too, not sure why. But you are correct, there are plenty of natural human products that are dangerous. Try injecting insulin when you dont need it, or how about a big dose of oestrogen for a man?

      --
      **TODO** Steal someone elses sig.
    10. Re:It's a Natural Repellant by baudbarf · · Score: 1

      Don't forget the good ol' hydrochloric stomach acid! Your body has to create ANOTHER chemical to protect your stomach from its effects.

      The point is, we still don't entirely understand our bodies, and we don't know what checks and balances exist. If we tip the balances, or isolate and extract chemicals from them for other uses, we don't understand exactly what will happen.

      --
      You can run but you can't hide, except, apparently, along the Afghan-Pakistani border.
  3. Needless Editorializing by stienman · · Score: 4, Insightful

    ...and are believed by some to be carcinogenic.

    I love this type of statement. It just reeks with the type of FUD that flies back and forth in the OS war.

    If it's a belief, then it has no place in the introduction - it's a myth or rumor.

    If, however, there are studies which cast doubt on its safety then it's well and good to show that with a statement like, "and are shown to be carcinogenic in some studies."

    Gah. I realize I'm being pedantic, but can we please stop the rumors and FUD in general? Or are we merely being hypocritical by letting our own FUD be published while decrying FUD used against us?

    -Adam

    1. Re:Needless Editorializing by thesp · · Score: 4, Informative

      Well, here at Oxford, if we want to use this stuff we have to go by the MSDS, given here. It states: Safety (MSDS) data for N,N-diethyl-N-toluamide "Toxicology Toxic if swallowed, inhaled or absorbed through the skin. May cause systemic effects. Experimental reproductive effects. Mutagenic data. May cause CNS disturbances. Toxicity data SKN-HMN TDLO 35 mg kg-1 ORL-WMN LDLO 950 mg kg-1 ORL-MAN LDLO 679 mg kg-1 ORL-RAT LD50 1950 mg kg-1 SKN-RBT LD50 3180 mg kg-1" Furthermore "Personal protection: Safety glasses, gloves, adequate ventilation."
      So, the "...are believed by some" tag is entirely valid...

    2. Re:Needless Editorializing by stienman · · Score: 1

      Perhaps I'm misreading, but I don't see 'carcinigen' in there. Toxic, yes. Mutagenic data...? This is mutation, not cancer.

      Further, you're reading the data sheet for the pure chemical. Of course the risks and the care that must be taken are significantly greater than the 1% or so solution used for mosquito protection.

      As I said - no need to put 'believed'. Lots of people believe in an alien conspiracy - let's talk about what we know to be true, or even theories, not what is 'believed.'

      -Adam

    3. Re:Needless Editorializing by Anonymous Coward · · Score: 0

      Ok, "LD50" I understand. I guess "TD"="Toxic dose".

      What is the "LO" in "TDLO"?

    4. Re:Needless Editorializing by Glog · · Score: 1

      Kudos, nice way to shut up a troll!

    5. Re:Needless Editorializing by Chirs · · Score: 2, Informative

      "1% or so solution" ????

      Typical bug sprays are around 30% deet, and it is not at all difficult to buy pure liquid deet as well (usually in a non-aerosol pump).

    6. Re:Needless Editorializing by NorthDude · · Score: 3, Informative

      Here is a glossary for reading msds : http://ptcl.chem.ox.ac.uk/MSDS/glossary/GLOSSARY.h tml

      There is no TDLO, but you can extrapolate by reading LD50, LDLO and TD50...

      --


      I'd rather be sailing...
    7. Re:Needless Editorializing by lord+sibn · · Score: 2, Informative

      *coughs*

      And what was it that you thought cancer actually *is*?

      Mutations, my friend. Nothing more, nothing less. some beneficial or benign, most dangerous. Are you really proposing that Deet causes (according to some studies) "mutations" that will give you the power to control the weather or fly? What type of "mutation" are you really expecting here?

    8. Re:Needless Editorializing by dmatos · · Score: 1

      In Canada at least, you can no longer purchase concentrations higher than 30%. I still treasure my bottle of 99.5% Deet and related toluamides Muskol. Nothing keeps the bugs off better!

      --

      It may look like I'm doing nothing, but I'm actively waiting for my problems to go away.
      --Scott Adams
    9. Re:Needless Editorializing by stienman · · Score: 1

      And what was it that you thought cancer actually *is*?

      Cancer is a very specific type of mutation. The vast majority of mutations don't cause cells to replicate dangerously.

      -Adam

    10. Re:Needless Editorializing by SdnSeraphim · · Score: 1

      I believe DEET is actually N, N-diethyl-3-methybenzamide (DEET)
      See ref: http://www.msstate.edu/Entomology/Homepest/mosquit orepell.html
      Although I am not a chemistry person.

      --
      It is dangerous to be right on a subject on which the established authorities are wrong. - Voltaire
    11. Re:Needless Editorializing by Anonymous Coward · · Score: 0

      N,N-diethyl-3-methylbenzamide is just another way of saying N,N-diethyl-m-toluamide. It's just usage of slightly different nomenclature

    12. Re:Needless Editorializing by RatPh!nk · · Score: 2, Interesting

      Much like any chemical worth its CAS Number, there are a number of names: (ChemFinder.com)
      N,N-diethyl-3-methylbenzamide [134-62-3]
      Synonyms: Metadelphene; M-DET; Off; Repel; repper-det; repudin; M-deta; 3-methyl-N,N-diethylbenzamide; m-toluic acid diethylamide; ai 3-22542; Autan; baker's antifol; dieltamid; diethyl-m-toluamide; Diethyltoluamide; Chigger-wash; Deet; Delphene; deta-20; Detamide; ENT 20218; flypel; MGK; mgk diethyltoluamide; naugatuck det; N,N-diethyl-3-methylbenzamide; N,N-diethyl-m-toluamide; N,N'-diethyl-m-toluamide; N,N-Diethyl-m-toluamide, , min.95% meta-isomer; N,N-diethyltoluamide;

      --
      Argh. The laws of science be a harsh mistress.
    13. Re:Needless Editorializing by Anonymous Coward · · Score: 0

      "SKN-RBT LD50 3180 mg kg-1"

      Doesnt that mean you have to beat them to death with it?

  4. Carbon Dioxide by digitalchinky · · Score: 4, Interesting

    A biologist friend of mine studying ross-river-virus explained that it was related to our emission of carbon dioxide. They 'smell' it.

    At least, that's what I think was said - I was pretty drunk at the time...

    1. Re:Carbon Dioxide by WormholeFiend · · Score: 1

      Yep. You can even buy carbon dioxide-based mosquito lures or traps.

      IIRC the problem is that different mosquito species are attracted to different concentration levels of CO2 emissions.

      What would be good (at least on the short-term, for the benefit of humankind only) is if there was a massive international spraying campaign of organisms that feed on mosquito larvaes.

      Question is, what is the importance of the mosquito in the food chain?

    2. Re:Carbon Dioxide by iq+in+binary · · Score: 1

      Question is, what is the importance of the mosquito in the food chain?

      The exact same question could be asked about homo sapiens, are you sure you want to delve too far into that subject?

      --
      Of all the Universal Constants, here's one I know: Nice guys finish last ;)
    3. Re:Carbon Dioxide by WormholeFiend · · Score: 1

      I'd say that so far, we homo sapiens have been pretty successful at sending our predators on the way to extinction. :-(

    4. Re:Carbon Dioxide by BeaverCleaver · · Score: 1

      In that case, couldn't I just crack open a beer? The stupid mosquitos get lured into the fizzy brew and then get covered in beer and can't fly out. In the ultimate irony, I can then consume the little bitches as I drink, getting a nice protein hit to balance out the carbs in the beer.

      In Soviet Russia, I eat the mosquito!

      Or something...

  5. B-complex by cbiffle · · Score: 4, Interesting

    I wish the article had provided a bit more info on what the specific chemicals were.

    In my family, we've traditionally used B-complex to ward off mosquitos. If you take a certain amount (more than usual, not enough to stink and turn orange), mosquitos ignore you completely.

    Wonder if it's related.

    1. Re:B-complex by bubblewrapgrl · · Score: 1

      I agree that the article needs more information. I don't find it interesting that there are "come and get me" smells that make mosquitos bite me. I'd much rather know what these chemicals are, although I realize that they're probably not releasing that information due to publications, etc. that are pending.

      Personally, I don't ever use bug spray. I let the mosquitos bite. Most of my family has developed a tolerance to mosquito bites so that they don't really itch anymore (mosquito bites itch basically because of an allergic reaction to chemicals that the mosquitos secrete and leave on your skin).

    2. Re:B-complex by gorre · · Score: 1
      I wish the article had provided a bit more info on what the specific chemicals were.
      I saw this story on the Channel 4 News yesterday and at the end of the report the correspondent said something like: "as to what the chemicals are, the scientists won't say as they are seeking a patent".
      --
      "Madness is something rare in individuals - but in groups, parties, peoples, ages it is the rule." -- Nietzsche
    3. Re:B-complex by Anonymous Coward · · Score: 0

      Uh oh . . . you said "patent". You'd better duck.

    4. Re:B-complex by bcattwoo · · Score: 1
      Personally, I don't ever use bug spray. I let the mosquitos bite. Most of my family has developed a tolerance to mosquito bites so that they don't really itch anymore (mosquito bites itch basically because of an allergic reaction to chemicals that the mosquitos secrete and leave on your skin).

      I hope you don't live in an area where West Nile Virus is a concern.

    5. Re:B-complex by Anonymous Coward · · Score: 0
      (... and turn orange)

      I think you're thinking of beta-carotene.

    6. Re:B-complex by Anonymous Coward · · Score: 0

      why? The infection rate is low and the percentage of those who get an infection who have any problem is low and even then, most people recover fine without any medical attention.

    7. Re:B-complex by thogard · · Score: 1

      Years ago my boy scout troop used Geritol and it mostly worked well for most guys but there tended to be one that it didn't work for. It worked within reason as well. If you were too close to the very high density mosquito breeding grounds, you would get bit.

  6. Ceiling fan works just fine by dolphin558 · · Score: 1

    Want to repel mosquitos? A fan and baby powder works just fine.

    1. Re:Ceiling fan works just fine by Anonymous Coward · · Score: 0

      I don't have a mosquito problem when I'm in my house. What do you expect me to plug the fan into? My ass?

    2. Re:Ceiling fan works just fine by dolphin558 · · Score: 1

      You don't?? You're fortunate. I do, during the warmer months, when I want to leave the windows open (with screens in the window of course)

  7. Maybe it's genetic? by Xaroth · · Score: 2, Funny

    I mean, they could just start with the Yamada family and see what makes *them* so tasty!

    For those that don't get the reference

  8. Horse Mosquitos by RobertB-DC · · Score: 2, Interesting

    It's already known that some mosquitos target specific species. I've seen this in action on my horses -- they can be covered in LARGE mosquitos, while I remain relatively bite-free. That doesn't stop me from trying to kill as many of them as I can.

    Of course, one reason these mosquitos can survive on horses is because horses are big and tough, whereas I am small and wimpy. When the horse walks off, the mosquitos that get left behind sometimes decide they should try a little human in their diet... and it HURTS, with the result that the mosquito in question gets splattered. Darwinian selection at work.

    How about this: give me something that will ATTRACT and then KILL the mosquitoes. Preferably, something like this.

    --
    Stressed? Me? Of course not. Stress is what a rubber band feels before it breaks, silly.
    1. Re:Horse Mosquitos by TykeClone · · Score: 1

      I'd prefer a spray to attract them (and then spray that on someone else nearby)

      --
      A fine is a tax you pay for doing wrong and a tax is a fine you pay for doing all right.
    2. Re:Horse Mosquitos by WormholeFiend · · Score: 1

      One word: Octenol

    3. Re:Horse Mosquitos by JahToasted · · Score: 1
      How about this: give me something that will ATTRACT and then KILL the mosquitoes.

      Maybe you should google for "Mosquito Terminator".

    4. Re:Horse Mosquitos by TykeClone · · Score: 1

      That should be good for laughs at little league baseball games this summer (insert maniacal laugh here).

      --
      A fine is a tax you pay for doing wrong and a tax is a fine you pay for doing all right.
  9. Need beta testers? by jtapper · · Score: 2, Interesting

    Spending a summer in Winnipeg will be the ultimate test for this or any other mosquito product.

    There was a few weeks this year where I could even use the front door of my house because for wahtever reason the mosquitos liked to congregate on my door. There would be 20-30 on the door and of course they'll get into the house.

    The only thing more annoying than mosquitos outside is mosquitos inside.

    Be sure to check out the annual mosquito festival in Winnipeg starting May long weekend and going through until labour day, rain or shine. ;)

    --
    Got a site/story worth sharing? Leave a mark
  10. Other stories by tod_miller · · Score: 2, Interesting

    New Scientist coverage 22nd Jan
    17 th Jan New Scientsit better article

    I am convinced if thier search went back to 2000/2001 they had this story back then (about scents that attract mosquitos)

    mosquitos are actively being eradicated by technology, developments to ecnourage bats to 'cave' closer to mosquito hotspots, 100watt sound speakers that bust open the guts of larvea under water and my personal favourite, a well aimed pillow in the middle of the night.

    bastards.

    --
    #hostfile 0.0.0.0 primidi.com 0.0.0.0 www.primidi.com 0.0.0.0 radio.weblogs.com
    1. Re:Other stories by Anonymous Coward · · Score: 0

      "eradicated" - I think that is a bit strong. You better look that one up in the dictionary?

      "100watt sound speakers that bust open the guts of larvea under water" - Sounds like fun, but do you really think that is a feasible solution?

    2. Re:Other stories by compro01 · · Score: 1

      well, that would be IMO, a better idea than fogging the swamps and such. just drag around a large speaking in a watertight container.

      --
      upon the advice of my lawyer, i have no sig at this time
  11. Mosquitos are attracted to CO2 from your breath by mozkill · · Score: 1

    Everyone should know that mosquito repellent does not keep mosquitos from finding the area around you although it may keep them off your actual body.

    Mosquitos are attracted to the CO2 from your breath. They arent attracted to smell or blood or anything.

    --

    -- Betting on the survival of the media industry is a serious risk. I advise investing elsewhere.
  12. From someone who probably knows... by b00m3rang · · Score: 3, Informative

    A park ranger told me that what they all use is Avon Skin So Soft. It's not designed as a bug repellant, but apparently it works the best.

    I haven't tried it myself.

    1. Re:From someone who probably knows... by EricWright · · Score: 2, Informative

      I have... it's freakish how well this stuff repels mosquitos!

    2. Re:From someone who probably knows... by GOD_ALMIGHTY · · Score: 1

      That's all we used when I was a kid. It worked great for me, but skeeters always seem to prefer someone else to myself, so I may not be the best spokesperson.

      --
      Arrogance is Confidence which lacks integrity. -- me
    3. Re:From someone who probably knows... by shadowbearer · · Score: 1

      Agreed. I used to live in N. MN in the swampland (Iron Range) and I'm one of those people whom for whatever reason mosquit-woes consider Fine Dining :0

      A.S.S.S. (lol) helps - doesn't eliminate the problem, for me at least, but it definitely reduced it. I'd put some Avon on one arm, and watch the other arm get covered quicker.

      I've since moved to somewhere much drier. Mosquitoes? What mosquitoes? :-D

      ( Of course we have certain bluebottle-type flies who would make excellent torture implements. :( )

      Don't even get me started on ticks.

      SB

      --
      It's old. The more humans I meet, the more I like my cats. At least they are honest.
  13. Good to hear... by deemaunik · · Score: 1

    Hm. I'd heard previously that blood type also had something to do with it. But it doesn't, apparently. http://ask.yahoo.com/ask/20041111.html I'm the type of person that gets nailed three times by one mosquito, and they Always come to me first. They'll pass by three of my coworkers just to get to me... it's pretty effing irritating. I also seem to be more resistant to poisonous spiders, scorpions, and hornet stings than I am to a simple mosquito or flea bite. When I first landed in Hawaii, one nailed me on the back of the hand, and it swelled up to about three quarters of an inch higher than normal, and spread across the entire topside of my left hand. So, needless to say, any research that gets rid of them without coating me in oils that provoke my allergies or smoke that carries evil odors... makes me happy. Onward, researchers! My blood and skin are at stake! If anyone else has the same huge problems with them that I do, check out this link. It'll probably help. http://www.epa.gov/pesticides/factsheets/mosquito. htm

  14. B.O. may have practical use by Tablizer · · Score: 1

    It was already known that some people produce "come and get me" smells which appeal to the blood-suckers.....Rothamsted Research, in Herts, found those less likely to be bitten produced odours which masked these scents.

    What if this masking agent turns out to be B.O.? It just may have the downside of repelling girls also.

    1. Re:B.O. may have practical use by Anonymous Coward · · Score: 0

      This is /., come on.

  15. skin-so-soft by juggledean · · Score: 1


    produced by Avon skin-so-soft is a popularfolk mosquito repellent, if your friends can stand the smell.