Trichuris trichuria Flashcards
(28 cards)
Synonym
Trichocephalus trichurius, Trichocephalus dispar
Common name
Whipworm
Infective stage:
Embryonated ova
Main habitat
Cecum, appendix
Principal host
man, but has been found in hogs, monkeys,
cattle, dogs, mice
Life span
5-10 yrs
Ova shape
Barrel/football shape or japanese lantern
3 layers
undeveloped, unicellular embryo
outermost layer – smooth, bile-stained
Hyaline/Mucus plug
Smooth, bile-stained layer
Outermost layer
Polar plug layer
Hyaline/ mucus plug
Unsegmented at ovi position
Unfertilized egg
Adult color?
Flesh colored
anterior three-fifths is attenuated (whiplike)
Adult
Male posterior portion is?
Coiled
lanceolate spicule protruding through a refractile
pineal sheath
Male
Distinguishing character of male
Pineal sheath
inverted spiculate at the posterior portion of the
male
Adult male
bluntly rounded posterior end
Adult female
Bluntly rounded posterior end
Female
Embryonic development will take place in what?
Outside of the host
Unhatched infective first stage larva is produced in how many weeks?
Three weeks
Favorable envi
Warm, moist and shaded soil
Disease
Trichuriasis
the weakness and wasting due
to severe chronic illness. It is sometimes present in
test.
Extreme cachexia
