Parasitology (Lec 11 & 12) - Cattle, Sheep, Goats - Premium Answers

The most economically significant parasite in cattle production.a) Haemonchus contortusb) Ostertagia spp.c) Trichostrongylusd) Cooperia {Ans: } b) Ostertagia sp.A significant etiologic cause of fatal anemia in small ruminant hosts.a) Haemonchus contortusb) Ostertagia spp.c) Trichostrongylusd) Cooperia {Ans: } a) Haemonchus contortusGeneral rule: All Trichostrongylid nematode parasites are small, gut dwelling & have no tissue migration.True or False? {Ans: } TrueGeneral rule: All Trichostrongylid nematode parasites have a simple, indirect lifecycle.True or False? {Ans: } False.Direct lifecycleGeneral rule: All Trichostrongylid nematode parasites undergo some level of arrested development (aka hy-pobiosis)True or False? {Ans: } TrueTrichostrongylid: Recently ingested pasture larvae enter the gut tissue, stop developing, and remain in juvenile state for several months. This is known as what? {Ans: } Arrested develop-ment (hypobiosis)The pre-patent period for Trichostrongylid parasites is ~_____ days from infectiona) 15b) 10c) 21d) 30- Eggs are 70x90 x 40x45- Eggs of all species are morphologically indistin-guishable {Ans: } c) 21 8.Trichostrongylid nematodesBrown stomach worm {Ans: } Ostertagia spp.Ostertagia spp. adult worms are parasitic in thea) Rumenb) Abomasumc) Reticulumd) Small intestine {Ans: } b) AbomasumThis parasite has distinct spiculesa) Haemonchus contortusb) Ostertagia spp.c) Trichostrongylusd) Cooperia {Ans: } b) Ostertagia spp.Direct