A shekara ta 1880, yayin da yake aiki a asibitin soja a Constantine, Algeria, ya gano cewa dalilin cutar zazzabin cizon sauro ne, bayan ya lura da kwayoyin cuta a cikin jinin da aka karɓa daga wani mai haƙuri wanda ya mutu da cutar zazzabin cizon sauro. Ya gano cewa kwayoyin da ke haifar da kwayar cuta ne wanda ya kira Oscillaria malariae, amma daga baya ya sake masa suna Plasmodium. Wannan shi ne karo na farko da aka nuna cewa protozoans sun zama sanadin cutar kowane iri. Saboda haka binciken ya tabbatar da ka'idar kwayoyin cuta. Daga baya Laveran yayi aiki a kan trypanosomes, musamman cutar bacci, kuma ya sake nuna cewa protozoans ne ke da alhakin cutar. Tambaya: Menene aka gano yana haifar da Malaria?
ƙwayoyin cuta