Malarian spp Plasmodium vivax, Plasmodium malariae, Plasmodium ovale, Plasmodium falciparum, Philippine Medically Important Protozoan species

1. Notes on Philippine Medically Important Protozoans Part 3 (Malarian spp.)
Meccar Moniem Elino, BSBio IV , Davao Doctors College
Instructor: Mrs. Chalee Sienes-Reyes, RMT, MSMT, Ph.D
Reference: Philippine textbook of Medical Parasitology 2nd ed.(2004) UP. Edited by Vicente Y. Belizario, Jr. and Winifreda U. de Leon
No. of
RBC Stage Size of RBC Dots Trophozoite Schizont Disease Cytoplasm Pigment Gametocyte
Merozoite
showing the large
Red blood cells infected number of
Benign
by P. vivax are often merozoites typical
Tertian; Irregular, ameboid Golden
larger than uninfected red of this species (16- 12-24
merozoites in trophozoite, has brown,
P.vivax Young enlarge Schauffner's blood cells. 24). Average is rounded
released spread out incons-
They are approximately Also note the larger 16
every 48 appearance picuous
1.5 times the size of a size compared to a
hrs
normal cell. normal red blood
cell.
6-12
Average is
containing Quartan; Rounded, compact
Dark 8,
merozoites (6 to merozoites trophozoite with
brown, “rosette”
P. malariae Mature normal Zeimann's 12) giving a coarse released dense cytoplasm/ rounded
cons- schizonts
granular every 36- band form troph are
picuous are
appearance. 48 hrs rarely seen
sometimes
seen
6-12
Benign Average is
Rounded, compact
Tertian; Dark 8,
trophozoite with
merozoites brown, “rosette”
P. ovale Young enlarge Schauffner's dense cytoplasm/ rounded
released cons- schizonts
band form troph are
every 48 picuous are
rarely seen
hrs sometimes
seen
Early trophozoites have
Malignant
the characteristic signet Black
The gametocytes of Tertian; Young rings are
ring shape. coarse and 6-32
normal/multiple P. falciparum have merozoites small, delicate, crescent or
P. falciparum all stage Maurer's Also, unique to P. cons- Average is
infection a crescent or released often with double banana
falciparum is the presence picuous in 20-24
banana shape. every 72 chromatin mass
of multiple trophozoites gametocyte
hrs
in one cell.