Home Products Most Popular Contact
No items in your cart.
The page below is a sample from the LabCE course Parasitology Case Studies: Protozoa in Blood (by ASCLS). Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Parasitology Case Studies: Protozoa in Blood (by ASCLS) (online CE course) »
How to Subscribe
Individual course$30 Add to cart
Individual course$30 Add to cart

Life Cycle

CDC - DPDx/ Alexander J. da Silva, PhD, Melanie Moser
  • Mosquito feeds on an infected person who has circulating gametocytes
  • Sporogeonic (sexual) cycle occurs in the mosquito
  • Mosquito feeds on susceptible person injecting sporozoites
  • Sporozoites travel through blood vessels to the liver and infects liver cells
  • Parasite grows to schizont stage where it ruptures merozoites
  • Merozoites infect red blood cells in the circulation
  • First stage immature trophozoite (ring form) grows to mature trophozoite that multiplies for binary fission asexually to become a mature schizont
  • Mature schizonts rupture releasing merozoites that can infect more RBCs
  • After several cycles, merozoites differenciate into male and female gametocytes
  • Gametocytes can then be ingested by a mosquito taking a blood meal and the cycle begins again
  • In cases of P. vivax and P. ovale hypnozoites form in the liver and can reactivate malaria months or years later for a true relapse