THE FEEDING MECHANISM OF AVIAN MALARIAL PARASITES

The Feeding Mechanism of Avian Malarial Parasites

Electron microscope studies of the erythrocytic forms, including gametocytes and asexual schizonts, of the protozoa Plasmodium fallax, P. lophurae, and P. cathemerium, have revealed a "cytostome," a specialized organelle of the pellicular membrane which is active in the ingestion of host cell cytoplasm. In material fixed in glutaraldehyde and postfixed in OsO(4), the cytostome appears in face v...

Malarial Fevers and Malarial Parasites

Free Malarial Parasites and the Effect of the Migration of the Parasites of Tertian Malarial Infections

1. The malarial parasite is extracellular throughout its life cycle and migrates from red corpuscle to red corpuscle destroying each before it abandons it; in the brief intervals between, the parasite is free in the blood serum; it does not remain long free, but almost immediately attaches itself to another red corpuscle by means of delicate pseudopodia. 2. The compact form of the tertian paras...

Studies on Malarial Parasites

1. Methods have been described for the preparation and sterilization of a synthetic nutrient medium which supports normal growth during one 24 hour asexual cycle of the erythrocytic form of P. knowlesi. 2. Successive subcultures with good multiplication can be carried out when whole blood or plasma is added to the medium. Data are presented from two such experiments where the sixth and seventh ...

Observations on the Parasites of Malarial Fevers

on 60 different occasions, and the result noted. In recording the appearances seen I only noted pigment-bearing parasites, as, although I believe I have frequently seen the clear, non-pigmented intra-corpuscular amoeboid forms of the parasite, I wished to confine myself at first to describing appearances which could only bear one interpretation. In examining the blood the procedure recommended ...