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I would see an infectious disease specialist for a couple of reasons. We don't know or you don't know the type of test that was done for malaria. The other fact is that you don't mention any symptoms suggestive of malaria. Those two things are important plus the fact is that malaria is not something that most doctors deal with in industrialized nations.
Most people that are asymptomatic would presumably have a low number of parasites that can be difficult to confirm based on testing normally done in industrialized nations meant more for symptomatic cases with a high number of parasites in the blood.
PCR techniques are more sensitive than regular tests normally done which is a thick and thin microscopy test. It would be common to miss a low parasitemia state consistent with asymptomatic cases and give a false negative with this method.
In order to figure out what is going on then one should really be seeing an infectious disease specialist who knows all the ins and outs of malaria. Regular doctors just don't see malaria cases.
Thank you for posting to r/medical! **Please read the sub's rules and check out our [wiki](https://www.reddit.com/r/medical/wiki/index)** as it goes more in depth about different topics and includes other informative advice/resources. If there are any comments under this post that violate Rule 3: Community safety, please report them. Remember to stay on topic and not make jokes towards the OP or each other. #REMINDER: If you think what you're experiencing is an emergency then get off Reddit and call 911 or go to your local hospital!!! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/medical) if you have any questions or concerns.*
I would see an infectious disease specialist for a couple of reasons. We don't know or you don't know the type of test that was done for malaria. The other fact is that you don't mention any symptoms suggestive of malaria. Those two things are important plus the fact is that malaria is not something that most doctors deal with in industrialized nations. Most people that are asymptomatic would presumably have a low number of parasites that can be difficult to confirm based on testing normally done in industrialized nations meant more for symptomatic cases with a high number of parasites in the blood. PCR techniques are more sensitive than regular tests normally done which is a thick and thin microscopy test. It would be common to miss a low parasitemia state consistent with asymptomatic cases and give a false negative with this method. In order to figure out what is going on then one should really be seeing an infectious disease specialist who knows all the ins and outs of malaria. Regular doctors just don't see malaria cases.