Intestinal Cestodes continued Clinical Microbiology Review 252
GRAVID INTERMEDIATE DIAGNOSTIC
CESTODE SCOLEX PROGLOTTID OVUM HOST TRANSMISSION STAGE OTHER
Taenia
solium
Diphyllobothrium
latum
Pork tape-
worm. Ova
infective to
humans.
Causes
cysticercosis.
Fish tape-
worm. Can
cause vitamin
B 12 deficiency.
Longer than
wide. 7–13
uterine
branches per
side. Regularly
alternating
genital pores.
Wider than
long. Central
rosette-shaped
uterus.
4 cup-shaped
suckers.
2 rows of
hooklets
around
rounded
rostellum.
Almond-
shaped. Lat-
eral groove
on each side.
No hooklets.
Same as
T. saginata.
Ovoid. 45 ×
70 μm. Yellow-
brown. Oper-
culum. Small
knob at
posterior.
Ingestion of
larva in under-
cooked pork
Ingestion of
larva in under-
cooked freshwa-
ter fish
Pig
1st: crustacean.
2nd: fish
Ova in feces
Ova in feces
continued...
