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Usually the disease is self-limiting, partly because the dog is a false host for the worms. Diagnosis is made by skin scraping, in which the larvae, measuring about 600×38 μm, can be easily identified with a microscope.
Eggs are deposited in feces of dogs, becoming infectious after 2–4 weeks. [8] Dogs ingest infectious eggs, allowing the eggs to hatch and the larval form of the parasite to penetrate through the gut wall. In dogs under 3 months of age, the larvae hatch in the small intestine, get into the bloodstream, migrate through the liver, and enter the ...
Cats, dogs, and foxes can become infected with Toxocara through the ingestion of eggs or by transmission of the larvae from a mother to her offspring. [16] [25] Transmission to cats and dogs can also occur by ingestion of infected accidental hosts, such as earthworms, cockroaches, rodents, rabbits, chickens, or sheep. [9] [22]
The estimations of the number of eggs in a gravid female pinworm range from about 11,000 [19] to 16,000. [21] The egg-laying process begins about five weeks after initial ingestion of pinworm eggs by the human host. [19] The gravid female pinworms migrate through the colon towards the rectum at a rate of 12 to 14 cm per hour. [19]
Many of the worms referred to as helminths are intestinal parasites. An infection by a helminth is known as helminthiasis , helminth infection, or intestinal worm infection. There is a naming convention which applies to all helminths: the ending "-asis" (or in veterinary science: "-osis") is added at the end of the name of the worm to denote ...
The repellent, such as Vectra 3-D, keeps mosquitoes from feeding on the dog and transmitting the L 3 stage worms. If a dog is bitten, the heartworm preventive takes over when administered. If a mosquito feeds on a heartworm positive dog on a repellent, they do not live long enough for the microfilaria they ingested to molt into the infective L ...