Resumen:
Toxocariasis is one of the most commonly reported helminth zoonotic
infections throughout the world. Its main etiologic agent is the Toxocara canis
nematode, and less frequently Toxocara cati, whose final hosts are the dog and cat
respectively [6, 9, and 11]. It is acquired through the ingestion of embryonated
eggs exposed to infected soil, geophagy, poorly washed hands, onychophagy, as
well as the ingestion of vegetables with animal feces and larvae encysted in the
tissue of paratenic hosts (various animals) [2,3,14]. These animals host hipobiotic
larvae in the liver and other tissues, which can be transmitted to humans trough the
ingestion of raw or undercooked meat [1, 4]. However there is little information
available on the prevalence of T. canis infection in humans trough paratenic hosts
such as horses, sheep, birds, etc. [13]. The objective of the present study was to
determine the presence of T. canis antibodies in sheep of Ayapango, Mexico State,
Mexico.
