There probably is no human being on this planet who loves mosquitoes or at least likes them or doesn’t get bothered by their extremely annoying sounds and bites. Most people have probably noticed that after a mosquito bites you, that place itches for an annoyingly long time. According to a new study, which the journal PLOS Neglected Tropical Diseases recently published, that is because when they bite you, they also give you some of their spit. It seems that the annoying itch comes from a mixture of proteins in their saliva which most people are allergic to.
This new study also claims that a human’s immune system might react to these proteins for about a week after the bite has been administered. This is basically why the place where a mosquito bit you can itch for up to a week. It has previously been suggested that the human immune system reacts badly to the spit of mosquitoes. However, it wasn’t clear to what extent. Now, the team of experts analyzed this reaction using mice which they enriched with a replica of a human immune system.
The reason why a mosquito bite itches for so long
After conducting this complex process, the team of researchers allowed mosquitoes to bite each mouse four time. Then, they analyzed their bone marrow, spleen cells and skin. This was how they found that certain proteins from the mosquito spit remained active even seven days after the bites had occurred.
Senior study author Rebecca Rico-Hesse said that this part of the study was extremely interesting. Nobody thought that mosquito spit was so strong and could remain active so many days after a bite. Also, for this study, they used an unusual method because you cannot simply go around and take samples of people’s bone marrow or spleen cells.
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