protozoan part 3
DESCRIPTION
Malarian spp Plasmodium vivax, Plasmodium malariae, Plasmodium ovale, Plasmodium falciparum, Philippine Medically Important Protozoan speciesTRANSCRIPT
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
RBC Stage Size of RBC Dots Trophozoite Schizont Disease Cytoplasm Pigment No. of
Merozoite Gametocyte
P.vivax Young enlarge Schauffner's
Red blood cells infected by P. vivax are often
larger than uninfected red blood cells.
They are approximately 1.5 times the size of a
normal cell.
showing the large number of
merozoites typical of this species (16-
24). Also note the larger size compared to a normal red blood
cell.
Benign Tertian;
merozoites released every 48
hrs
Irregular, ameboid in trophozoite, has
spread out appearance
Golden brown, incons-picuous
12-24 Average is
16 rounded
P. malariae Mature normal Zeimann's
containing merozoites (6 to
12) giving a coarse granular
appearance.
Quartan; merozoites
released every 36-
48 hrs
Rounded, compact trophozoite with dense cytoplasm/
band form troph are rarely seen
Dark brown, cons-
picuous
6-12 Average is
8, “rosette” schizonts
are sometimes
seen
rounded
P. ovale Young enlarge Schauffner's
Benign Tertian;
merozoites released every 48
hrs
Rounded, compact trophozoite with dense cytoplasm/
band form troph are rarely seen
Dark brown, cons-
picuous
6-12 Average is
8, “rosette” schizonts
are sometimes
seen
rounded
P. falciparum all stage normal/multiple
infection Maurer's
Early trophozoites have the characteristic signet
ring shape. Also, unique to P.
falciparum is the presence of multiple trophozoites
in one cell.
The gametocytes of P. falciparum have
a crescent or banana shape.
Malignant Tertian;
merozoites released every 72
hrs
Young rings are small, delicate,
often with double chromatin mass
Black coarse and
cons-picuous in
gametocyte
6-32 Average is
20-24
crescent or banana