21. She also examined factors that contributed to " Plasmodium " reproduction. 22. In 1897, William Welch identified and named " Plasmodium falciparum ". 23. Many " Plasmodium " species infect more than one primate host species. 24. Once favorable conditions resume, the plasmodium reappears to continue its quest for food. 25. The remaining genera lay within the currently established genus " Plasmodium ". 26. An extract of the twigs shows activity against " Plasmodium falciparum ". 27. A : Mycologist ( fungi guru ) David Lewis suspects this fungus is a plasmodium . 28. Malaria parasites belong to the genus " Plasmodium " ( phylum Apicomplexa ). 29. There are over one hundred species of mosquito-transmitted " Plasmodium ". 30. This was a major evolutionary transition that allowed Plasmodium to exploit humans and other mammals.