Exercise 15: Family Trichostrongylidae Flashcards
Adults occur in the abomasum of sheep, goat, and infrequently cattle
Haemonchus contortus
Also known as the twisted stomach worm, wire worm or barber’s pole worm, caused by the ovaries spirally wound around the intestines
Haemonchus contortus
It is blood sucking
Haemonchus contortus
Buccal cavity is mall and armed with a curved dorsal lancet
Haemonchus contortus
Copulatory bursa: dorsal lobe is pramedian in position, arising close to the left lateral lobe
H. contortus male
Presence of spicules
Male H. contortus
Ligualiform anterior flap covering the vulva
Haemonchus contortus female
Eggs of H. contortus resemble those of
Strongylus spp
Occurs in abomasum of cattle
H. similis
Both species occur in Philippines
H. contortus
H. similis
Occurs in the abomasum of cattle and carbaos in the Philippines
Mecistoccirus digitatus
Vulva opens near the anus
Mecistocirrus digitatus
Spicules which are long and slender and united for almost their entire length
Mecistocirrus digitatus
Genus Characterized by transveresly striated and often inflated cuticle of the head region
Cooperia
Occur in small intestines and rarely abomasum of ruminants
Cooperia
9 mm or less (small)
Cooperia
Occur in small intestines and rarely abomasum or ruminants
Cooperia
Spicules have prominent wing
Cooperia
Cooperia spp occuring in the Philippines:
Cooperia curticei- cattle
Cooperia punctata- cattle
Cooperia pectinuta- cattle
Occurs in small intestine of water buffalo causing nodule formation
Paracooperia nodulosa
Very small worms and buccal cavity not well defined or absent. There is prominent excretory pore
Trichostronglyus
Trichostrongylus occuring in the Philippines
T. longispicularis- SI, cattle & sheep
T. colubriformis- SI sometimes abomasum of ruminants, rabbits, pig, dog, man
T. capricola- SI, sheep & goats
T. axei- abomasum of ruminants, stomach of horses, pigs and man
