QUESTION
I have been in New Guinea recently and 2 weeks on am exhibiting all the signs and symptoms of malaria. What is best course of action, considering I do not know what sort of mosquito was hovering about?
ANSWER
You should visit your physician or a clinic immediately. Depending on where you are, you may have to visit a specialist travel medicine clinic, to be sure that you will be seen by someone who understands how best to diagnose malaria. They should take blood and examine it under a microscope (using thick and thin blood films), or they may utilise a rapid diagnostic test. Either way, they will be able to determine whether you have malaria and if so, which type of malaria you have.
This is important because some types of malaria, such as Plasmodium vivax (which is very common in PNG) can remain dormant in the liver after the initial infection has been treated, which leads to relapses months or years later. In order to prevent relapses, if you find you are infected with P. vivax you should inquire about the possibility of also being given primaquine, which is a drug that can kill these liver stages.
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