According to Welcome-trust, an organization involved in the study and research of malaria, there are more than 120 known species of the parasite in the genus Plasmodium, but only four of them. 120 species infect humans and cause malaria. Humans can be infected by four species of Plasmodium parasites: Plasmodium vivax, Plasmodium malariae, Plasmodium falciparum and Plasmodium ovale. The main difference between the different species is that Plasmodium falciparum can cause serious and life-threatening malaria, while the others cannot. « Malaria life cycle - mosquito stages | Wellcome Trust")In most cases of malaria, the patient feels well and the infection is only detected by a blood test which detects parasites in the blood. This is the most common case of malaria in people who have experienced several attacks of malaria and who have some degree of immunity to the disease is also the case among older children and adults in most of Africa south of the Sahara, since the Immunity is primarily achieved through exposure to malaria (Fagan, 2000). Severe symptoms are very rare in non-immune people, such as travelers from a malaria-free area who become infected with (P. falciparum). ) Plasmodium falciparum causes uncomplicated malaria which, although very unpleasant, does not pose an immediate threat to life. The patient usually suffers from a persistent fever characterized by vomiting, vomiting accompanied by anemia (low hemoglobin level). in the blood) and an overly enlarged spleen. The victim also suffers from persistent diarrhea. Symptoms in children may be a little more serious because they are in addition to the symptoms mentioned above. children may also suffer from rapid breathing and feel a problem...... middle of paper ......a Journal | Full text | Increased detection of Plasmodium Knowlesi in Sandakan Division, Sabah as revealed by PlasmoNex¿", 2013,) Although all forms of malaria are taken seriously. Plasmodium vivax, Plasmodium malariae and Plasmodium ovale are generally not considered as fatal. However, victims must still receive treatment. The parasite remains in the hepatic (dormant) stage for years without causing disease. and cause a host of health problems if the parasite reactivates from the liver At this point, it weakens the victim's immune system, making it easier for the victim to become infected with opportunistic diseases such as Tuber Culosis (. TB) (Crutcher and Hoffman, 1996). Plasmodium falciparum (P. falciparum) is considered the most dangerous species and causes more deaths (Crutcher and Hoffman).)., 1996)