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21 Cards in this Set
- Front
- Back
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Mature nematode from the abomasum of a calf; length 7mm
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Trichostongylus axei, excretory pore in notch
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Mature nematode from the abomasum of a sheep; length 30mm
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Haemonchus contortus, vulvar flap linguiform
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Mature female nematode from the small intestine of calf; length 11mm; eggs of normal size
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Cooperia oncophora, cephalic cuticular dilation
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Mature nematode from the colon of a sheep; large bell-shaped buccal capsule
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Chabertia ovina, reduced leaf crowns
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Mature male nematode from the colon of a horse; 15mm long, no teeth
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Cyathostome, rectangular buccal capsule
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Mature nematode from the small intestine of a dog; length 15cm
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Toxocara canis, round, rough shelled eggs
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mature nematode from the stomach of a pig; length 10mm; cephalic cuticular dilation
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Hyostrongylus rubidus, short equal spicules
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Immature nematode from beneath peritoneum of a horse
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Strongylus edentatus, no buccal teeth
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Mature nematode from the small intestine of a chicken; 15mm long; slender and delicate
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Capillaria sp., eggs with bipolar plugs
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Mature nematode from the lung of a sheep; 10cm long
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Dictyocaulus filaria, males with short spicules
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How many moults and stages are there in the nematode life cycle?
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4 molts, 6 stages
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In the Strongylida the infective stage is...
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L3 in the intermediate host or free-living
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Exsheathment is...
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completion of the second moult of certain larvae after or during infection of the definitive host
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the minimum temp for the development of most infective larvae of stongylid nematodes is in the region of...
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10 degrees C
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The optimum temperature for the development of most free-living infective larvae of strongylid nematodes is in the region of....
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25 degrees C
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The minimum time for the development to the infective stage of free-living larvae of strongylid nematodes under optimum conditions is about...
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6-7 days
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What is ESSENTIAL to the migration and survival of free-living strongylid infective larvae?
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moisture and stable temperatures
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What is the prepatent period of a nematode infection?
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the time between infection of the definitive host and the appearance of eggs or larvae
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Which route are trichostrongyloid nematodes infective by?
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ingestion only
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with few exceptions trichostrongyloid nematodes inhabit..
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the alimentary tract
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with few exceptions trichostrongyloid nematodes have ..... life cycles and ....... migrate in the final host.
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direct life cycles, do not migrate
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