Where is Toxocara canis found?
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 causes Toxocara canis?
Toxocariasis is an infection caused by the ingestion of larvae of the dog roundworm Toxocara canis or the cat roundworm Toxocara cati. The soil of parks and playgrounds is commonly contaminated with the eggs of T canis, and infection may cause human disease that involves the liver, heart, lung, muscle, eye, and brain.
What is the specific definitive host organism of the roundworm?
Roundworm infection, or toxocariasis, is a zoonotic disease — a disease that can be transmitted from animals to humans. Dogs and cats are the definitive hosts for the roundworm species that commonly cause human disease.
What is an intermediate host in microbiology?
1 : a host which is normally used by a parasite in the course of its life cycle and in which it may multiply asexually but not sexually — compare definitive host.
What is a definite host?
Definition of definitive host
: the host in which the sexual reproduction of a parasite takes place — compare intermediate host sense 1.
What is Toxocara canis in dogs?
Toxocara canis is a roundworm which primarily affects dogs. Although it doesn’t commonly cause disease in adult dogs, symptoms can be severe in young puppies. More importantly, Toxocara Canis can infest humans as an intermediate host, causing several different syndromes.
How many larval stages are in the life cycle of Toxocara canis and which one is infective?
canis will have different number of larval stages. Most worms have three larval stages before becoming infective. Toxocara canis is dioecious having morphology distinctly different for the male and female.
How is Toxocara canis diagnosed?
A blood test is available that looks for evidence of infection with Toxocara larvae. In addition to the blood test, diagnosis of toxocariasis includes identifying the presence of typical clinical signs of VT or OT and a compatible exposure history.
How is Toxocara Cati transmitted?
Cases of adult Toxocara cati passed from children are documented, but they originate from the ingestion of worms expelled with vomit or faeces by an infected animal.