Practical 5 Flashcards
How many times do the nematodes moult during their
ontogenic development?
4
What is the name of the expanded chitinous mouthpart of the nematodes?
Buccal capsule
Eggs of gastro-intestinal worms are:
Thin-shelled
What term is correct for the nematodes?
Sexes usually are separated
They’re covered by cuticle
What organ can be the part of the body of nematodes?
Speculum
Bursa copulatrix
Uterus
How long in the pre-patent period of the gastro-intestinal worms usually?
3 weeks
Which species develop directly?
Hyostrongylis rubidus
Amidostonum anseris
Ostertagia ostertag
What is the Latin name of red stomach worm?
Hyostrongylus rubidus
What causes croupos-diphtheritic gastritis?
Hyostrongylus rubidus
Which adult worm is the smallest (min. size)?
Hyostrongylus rubidus
What is the cell stage of Hyostrongylus egg in vomitus?
4-8 cell stage
What is the correct term that characterize the Hyostrongylus worms?
Reddish body
Small cephalic vesicle
What is the infective stage of Hyostrongylus rubidus?
L3 infective larvae
What is the Latin name of gizzard worm?
Amidostomum anseris
Which adult worm is the largest (max. size)?
Amidostomum anseris
Gizzard worms effect:
Goslings, ducklings, young aquatic fowls
What is the most important host of Haemonchus contortus?
Sheep
What is the rare of mortality in case of Type II Ostertagiosis?
high
Which of the Trichostrongylid worms that have the largest eggs?
Nematodirus
What is the best way to detect eggs of Trichostrongylids in faeces?
flotation
What genera of worms can cause villous atrophy and erosion in the jejunum?
Cooperia
Nematodirus
Trichosdtrongylus
What is the method to separate the different Trichostrongylid worms in faecal sample?
Faecal culture of larvae
Which worms can cause haemorrhagic gastritis out of the following ones?
haemonchus
What is the host of Haemonchus contortus?
Sheep and goat
What is the host of Trichostrongylus colubriformis?
Sheep and goat
What causes abomasal nodules?
Ostertagia ostertagi
What is the cell stage of Nematodirus egg in faces?
4-8 cell-stage
What species can be found in abomasum of cattle?
Ostertagia ostertagi
What morphological character does not fit for Haemonchus contortus?
Smaller than 1cm
How worms can cause sub-mandibular oedema within the group of Trichostrongylids?
In mucosa
Which worms can produce umbilicated nodules on the surface of mucosa?
Ostertagia
What type of diarrhoea can be observed during the winter form of Ostertagiosis?
Intermittent
What kind of nematodes can be detected according to eggs?
Nematodirus
Eggs of Nematodirus spp. (compared to ‘Trichostrongyle-type’ eggs) are twice as big (130-260 um)
and in 4-8 cell stage.
In case of Type II Ostertagiosis, what can be detected in the faeces?
Few eggs
In the autumn, they ingest a lot of L3 which enter hypo-biotic state, and only a few eggs are
produced.
