Malaria parasites can be identified by examining under the microscope a drop of the patient's blood, spread out as a “blood smear” on a microscope slide. Before examination, the specimen is stained (most often with the Giemsa stain) to give the parasites a distinctive appearance.
According to Healthline", Malaria infection begins when an infected female Anopheles mosquito bites a person, injecting Plasmodium parasites, in the form of sporozoites, into the bloodstream. The sporozoites pass quickly into the human liver. The sporozoites multiply asexually in the liver cells over the next 7 to 10 days, causing no symptoms. Below are the signs that show malaria is growing in your body.
Fever.
Chills.
A general feeling of discomfort.
Headache.
Nausea and vomiting.
Diarrhea.
Abdominal pain.
Muscle or joint pain.
Malaria is a serious disease that spreads when you’re bitten by a mosquito infected by tiny parasites. When it bites, the mosquito injects malaria parasites into your bloodstream. Malaria is caused by parasites, not by a virus or by a type of bacterium.