Four species of plasmodia commonly infectman. Falciparum is the most cirulent and causes malignant reriian malaria or falciparum malaria. oipax and P. ooale cause benign teriian malaria and P. malariae produces quartan malaria. Recently, P. lcnowlesi, a simian parasite, was identified as the cause of some cases of malaria Save for the exceptional instances of transfer of the disease by transfusion, or contaminated needles used by drug addicts, the usual vectors of spread are species of the genus of Anopheles mosquitoes, and, as many male chauvinists have longcontended, only the females of the species are dangerous. Medical Billing Services. will help you to do collections and also the pending amounts from the patients.