The adult body is whip-shaped; the anterior end fine, hair-like, and embedded in the wall of the large intestine (see Fig. 8.76); and the posterior end stout and lying free in the lumen

Intermediate host of Dioctophyme renale

Intermediate host of Thelazia spp.

Dioctophyme renale eggs are passed in

However, in the unique life history of, both adult and larval stages occur in sequence in the same host, the tiny adults lying within the villi of the small intestine and the larvae they produce becoming curled up in cysts in the striated muscle

Which is nearer on the surface of the skin?

Toxocara is a genus of ascaridoids that as adults parasitize the of various mammals.

Adult Trichinella are found in

Dioctophyme renale adult is found in

is a parasite of cats and dogs in cooler climates of the world, which they acquire by the ingestion of infective eggs or paratenic hosts

Dirofilaria immitis are

The giant kidney worm of carnivorans, swine and sometimes humans.

The pups whimper and shriek almost continuously and adopt a peculiar straddle-legged posture of the hindlimbs when standing or walking.

Adult heartworms are found in the

Human infection is abortive and results in radiographic changes referred to as “coin lesions,” which have been misinterpreted as representing neoplasia and can lead to unnecessary thoracic surgery

Parafilaria are

These parasites live in the subcutaneous and intermuscular connective tissues and, when sexually mature, produce crops of pea-sized nodules that bleed through a tiny pore.

Trichinelloidea are

Eggs passed in the feces contain only a single cell and are not infective.

Life cycle of Toxocara canis

causes the ophthalmitis of “river blindness.”

If ingested by a coprophagous beetle, this vermiform embryo develops into a larva capable of infecting dogs and a broad range of paratenic hosts, including lizards, chickens, and mice.

Spirocerca lupi is found in

Ascarirds are

Summer bleeding

Ascarids mature in the

An infective first-stage larva develops inside the egg in about 1 month but does not hatch unless swallowed by a suitable host.

Adult Trichuris is found

THe final host is always infected by eating a firststage larva, even if a paratenic host is involved

Minks are the principal definitive hosts of this nematode.

Intermediate hosts of Parafilaria

Also, the first-stage larvae of all these genera have a little stylet called an onchiostyle.

In pig livers, the inflammation heals by fibrosis, giving rise to the so-called milk spot lesions (see Fig. 7.152) that cause the organ to be condemned by meat inspectors as unfit for human consumption.

are parasites of the conjunctival and lachrymal sacs of domestic animals.

Members of this superfamily are distinguished by their stichosome esophagus, which consists of a capillary tube surrounded by the bodies of a single-file column of gland cells called stichocytes

Life cycle of Toxocara cati

Intermediate host of Spirocerca lupi

a parasite of canids, is found in fibrous nodules in the wall of the esophagus or stomach

These worms are parasites of the pulmonary arteries