Protozoa: Sporozoa

Question 1

Plasmodium vivax (Ring)

Answer 1

only in reticulocytes
delicate cytoplasmic ring. (1/3 rbc)
ring surrounds vacuole
schuffner’s dots (stippling) may be present

Question 2

Plasmodium vivax (troph)

Answer 2

irregular ameboid appearance
ring remnants common
brown pigment
schuffner’s dots

Question 3

Plasmodium vivax (schizont)

Answer 3

Merozoites (12-24) in cell
surrounded by cytoplasmic material
brown pigment
schuffner’s dots

Question 4

Plasmodium malariae (Ring)

Answer 4

only mature rbcs
delicate cytoplasmic ring 1/6 rbc diameter
heavy chromatin dot
vacuole filled in.
NO schuffner’s dots

Question 5

Plasmodium malariae (troph)

Answer 5

non-ameboid appearance
cytoplasm is oval/basket/bar shaped (takes up most of rbc)
No vacuoles in mature form

Question 6

Plasmodium malariae (schizont)

Answer 6

Merozoites (6-12)
rosette pattern
has brown green pigment

Question 7

Plasmodium falciparum (Ring)

Answer 7

all rbc ages/sizes
1-2 chromatin dots
little cytoplasm
small vacuole
multiple rings
applique forms

Question 8

Plasmodium falciparum (gametocyte)

Answer 8

sausage/banana shape
compact chromatin
black pigment

Question 9

Babesia species (Ring)

Answer 9

RBCs
1 or more chromatin dots
little cytoplasm
no pigment
multiple rings (2-4)
can be vacuolated
can have the cross in it