Description of various important parasites of animals
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Introductory Lecture on veterinary informaticsFull description
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Parasite summaryFull description
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PRACTICAL MANUAL
GENUS : Trichuris Trichuris ovis : Common name : Whip-worm Location and host : Caecum of sheep, goat, cattle and other ruminants. Morphological Characters : 1. Male 50-80mm and females 35-70mm long. Anterior part of the body is long and slender, while the posterior part is much thicker. 2. 3. In males the hind end is curled and there is one spicule surrounded by a protrusible sheath which is usually armed with fine cuticular spines. 4. In females the vulva is situated at the beginning of the wide part of the body. 5. The worms are white in colour. FAMILY : FILARIIDAE GENUS : Dirofilaria Dirofilaria immitis : Common name
:
Heart-worm of dogs.
Location and host
:
Right ventricle and pulmonary artery of dog, cat, fox, wild carnivora and sometimes in man.
Intermediate host
:
Mosquitoes
Morphological Characters : 1. Males 12-16cm and females 25-30cm long. 2. The worms are slender and white !n colour. 3. In males, the hind end is spirally coiled, and the tail bears small lateral alae and large number of papillae. Spicules are unequal, left is long and pointed and right is short and ends bluntly. 4. In females, vulva is situated just behind the end of the oesophagus. FAMILY: SETARIIDE GENUS: Setaria, Stephanofilaria Setaria digitata : Location and host : Peritoneal cavity of cattle, buffalo, zebra Intermediate host : Mosquitoes Morphological Characters : 1. Worms are several centimeters long, milk-white in colour and taper towards the hind end, which is spirally coiled. 2. Mouth is surrounded by a cuticular ring which bears dorsal and ventral arid frequently also lateral prominences. 3. In males spicules are Unequal and in females the tail has spines or conical projections Stephanofilaria assamensis : Location and host : Skin of catle, particularly at the hump region. Intermediate host : Musca conducens Morphological characters : 1. Small milk-white parasites, males 2.3-3.2mm and females 6.1-8.5mm. long. 2. The oral aperture is surrounded by a protruding cuticular rim which has a denticulate edge. 3. The cuticle is spiney and transversely striated. MORPHOLOGICAL CHARACTERS OF OTHER NEMATODES
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G E N E R A L V E T E R IN A R Y P A R A S IT O L O
