What is the intermediate host of Toxocara?
What is the intermediate host of Toxocara?
In the wild, carnivorous animals such as cats and dogs consume infected meat or simply soil containing the eggs, and the parasite persists in their gut. Additionally, transplacental transmission has been documented in dogs and cats. Humans are amongst a plethora of possible intermediate hosts.
Does Toxocara cati have an intermediate host?
Toxocara cati has an incubation period of 8 weeks after ingestion of eggs from the environment or larvae from intermediate hosts, while the faecal excretion of eggs following transmission via milk starts after 6–7 weeks.
What is the infective stage of Toxocara spp?
Eggs embryonate and become infective in the environment (2). Following ingestion by dogs (3), the infective eggs hatch and larvae penetrate the gut wall. In younger dogs, the larvae migrate through the lungs, bronchial tree, and esophagus; adult worms develop and oviposit in the small intestine (4).
Where is Toxocara canis found?
What is toxocariasis? Toxocariasis is an infection transmitted from animals to humans (zoonosis) caused by the parasitic roundworms commonly found in the intestine of dogs (Toxocara canis) and cats (T. cati).
What are the Paratenic hosts of T. cati canis?
Humans are paratenic hosts for Toxocara spp. and eggs are found only in the feces of definitive hosts (cats and dogs).
What is a Parentic host?
[ păr′ə-tĕn′ĭk ] n. An intermediate host whose presence may be required for the completion of a parasite’s life cycle but in which no development of the parasite occurs.
Is Toxocara canis direct or indirect?
The life cycle can be either direct (through ingestion of infective ova) or indirect (through ingestion of infected paratenic hosts such as rodents, birds, worms, or mollusks). In contrast to dogs, there is no transplacental migration with Toxocara spp.
What are the Paratenic hosts of T CATI canis?
Which organism is the intermediate host for Dipylidium Caninum?
or cat flea
Canids and felids are the normal hosts for Dipylidium caninum. The intermediate host is usually the larval stages of the dog or cat flea (Ctenocephalides spp.) and occasionally Trichodectes canis (the dog louse).
What is Paratenic hosts?
A “paratenic host” was defined by Baer in his text Ecology of Animal Parasites in 1951 as “An optional intermediate host is one which the larvae usually enters passively, along with ingested food. The larvae are able to survive for considerable time without the new environment affecting in any way their ontogeny.
What are examples of paratenic host?
Paratenic hosts span a wide range of fauna and are not needed in the nematode’s life cycle, but act as reservoirs in which different larval stages of the parasite can persist but not develop further; they include freshwater shrimp, flatworms, and frogs.