ZOONOTIC HELMINTHS FROM DOGS AND CATS: A CONTINUING PROBLEM

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1. ZOONOTIC HELMINTHS FROM DOGS AND CATS: A CONTINUING PROBLEM FOR

VETERINARIANS ($4.95 USD, 27 KB) 100%

KEVIN R. KAZACOS, DVM, PHD

Tufts Animal Expo Conference Proceedings, September 1, 2001

 

Toxocara and Ancylostoma are common in dogs and cats, leading to

considerable human exposure. Patent Baylisascaris occurs in a low

percentage of dogs, which could also expose humans to infection with

this parasite. Humans become infected with ascarid larvae by

accidentally ingesting infective eggs from contaminated areas or

articles, including soil, hands, food, and fomites such as toys.

Humans become infected with animal hookworm larvae by skin penetration

or oral ingestion of infective larvae. Humans become infected from

environmental areas previously contaminated with dog or cat feces.

Infected pets are a particular problem because they contaminate the

immediate home environment with eggs, and since infected animals can

shed millions of eggs per day, they can rapidly and extensively

contaminate an area. With adequate moisture, infective ascarid eggs

may survive for years in the soil, and contaminated areas become

long-term sources of human infection.