QUESTION

How long does malaria take to actually affect you?

ANSWER

When you are bitten by a mosquito that is infected with the parasites that cause malaria, some of the parasites enter your blood stream in the mosquito’s saliva. After that, it will take at least one week, and usually between two and four weeks, before you start to feel the symptoms of the disease. This is because the parasite first goes to the liver, where it infects liver cells and undergoes replication. These cells mature into a form called merozoites, which then re-enter the blood stream, and start to infect red blood cells. The stage in the liver is not symptomatic for the patient, and is known as the pre-patent stage; once the merozoites start infecting and killing red blood cells, the patient will begin to feel sick, and the infection is said to have become patent.