Haemonchus contortus, also known as red stomach worm, wire worm or Barber's pole worm, is very common parasite and one the most pathogenic
nematode of
ruminants. Adult worms are attached to
abomasal mucosa and feed on the blood.Females may lay over 5,000 eggs a day, which are secreted from the animal via the
faeces. After hatching from their eggs, H. contortus
larvae molt several times, resulting in a L3 form that is
infectious for the animals. They can take up these larvae when eating grass leaves. The L4 larvae, formed after another molt, suck blood in the abomasum of the animal, potentially giving rise to
anaemia and
oedema, which eventually can lead to death.
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Stor löpmagmask, stor magmask, magmask (Haemonchus contortus) är en rundmask som lever som parasit i löpmagen på bland annat
får. Ekologiska gårdar har fått kritik för att de inte gör tillräckligt mycket för att skydda djuren mot olika parasiter, med fokus på löpmagmasken.
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