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W6 Nematodes Strongyloides and Trichostrongyloidea-I

Emma Gray 19 questions 5.0 (1 rating)

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  1. 1The relevant genus's of order Rhabditida include
    1. AStrongyloides, Rhabditis, & Micronema
    2. BCoccidia, Rhabditis & Ransomi
    3. CPseudophyllidea & Cyclophyllidea
    4. DSpiruroids, Filarioids, & Enoplids
  2. 2The important orders of phylum Nematoda include
    1. ARhabditids & Strongylids
    2. BAscarids & Oxyurids
    3. CSpiruroids & Filarioids
    4. DEnoplids
    5. EPseudophyllidea & Cyclophyllidea
  3. 3The following image is a parasite of order Rhabditida. Identify the following features of the worm: Corpus, Isthmus, BulbImage for question 3
    1. ACorpus
    2. BIsthmus
    3. CBulb
  4. 4Match the following spicules with their correct species of Trichostrongylus species.Image for question 4
    1. AT. colubriformis
    2. BT. vitrinus
    3. CT. rugatus
    4. DT. axei
    5. EBarb-like tip
    6. FDissimilar and unequal
    7. GTapering end
    8. HThick and dissimilar
  5. 5These spicules belong to which species of Trichostrongylus and how would you describe their morphology?Image for question 5
    1. AT. colubriformes, with a barb like tip on the spicules
    2. BT. vitrinus, with a barb like tip on the spicules
    3. CT. rugatus, with dissimilar and unequal spicules
    4. DT. axei, with dissimilar and unequal spicules
  6. 6The life cycle of Trichostrongylus involves a host stage, a [blank_start]dung[blank_end] stage, and a pasture stage. Dung containing worm eggs is passed from the sheep onto the pasture. At this stage eggs develop through L1 and L2 stages to the L3 stage. The L3 stage is known as the [blank_start]infective[blank_end] stage. Generally development to the infective stage is markedly reduced at temperatures below [blank_start]10˚[blank_end] and above [blank_start]35˚[blank_end]. During the pasture phase the L3 larvae migrate into [blank_start]moisture[blank_end] where they wriggle, some onto pasture, where they will then be consumed by the host. During the pasture phase the [blank_start]cuticle[blank_end] of L2 is retained by [blank_start]L3[blank_end] and acts to protect it from harsh conditions in the environment. After the L3 larvae is consumed it is [blank_start]exsheathed[blank_end] in the [blank_start]rumen[blank_end]. Infective larvae become adult that live for many months within the sheep's gut to reproduce and lay eggs. The minimum time from L3 to egg laying is [blank_start]18[blank_end] days.
    1. Adung
    2. Binfective
    3. C10˚
    4. D35˚
    5. Emoisture
    6. Fcuticle
    7. GL3
    8. Hexsheathed
    9. Irumen
    10. J18
  7. 7Name the strongyloid species that affect the mammalian hosts below. For example S. stercoalis is a strongyloid of dogs, cats and humans.
    Ruminants = [blank_start]S. papillosus[blank_end]
    Pigs = [blank_start]S. ransomi[blank_end]
    Horses = [blank_start]S. westeri[blank_end]
    Cat = [blank_start]S. cati[blank_end]
    [blank_start]Primates[blank_end] = S. fuelleborni
    1. AS. papillosus
    2. BS. ransomi
    3. CS. westeri
    4. DS. cati
    5. EPrimates
  8. 8The parasitic strongyloides are all found in the stomach, with the exception of the kangaroo species which can be found in the small intestines.
    1. ATrue
    2. BFalse
  9. 9Which of the following statements is false regarding the lifecycle of S. papillosus?
    1. AOnly female worms have been found parasitising the host
    2. BThere is a homogonic lifecycle and a heterogonic lifecycle
    3. CThe heterogonic lifecycle is free living and has a rhabditiform oesophagus
    4. DAt temperatures above 34˚C the parasitic lifecycle is triggered.
    5. EThe L1 and L2 larvae of the homogonic lifecycle have the oesophageal morphology of a filariform
  10. 10Ivermectin and Oxibendazole are appropriate treatments for Strongyloides.
    1. ATrue
    2. BFalse

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Description
Masters Degree Parasitology (Nematodes) Quiz on W6 Nematodes Strongyloides and Trichostrongyloidea-I, created by Emma Gray on 12/04/2016.
Author
Emma Gray
Language
English
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275
Rating
5.0 out of 5 · 1 rating
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