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Infections of humans caused by the transmission of disease agents that naturally live in animals. People become infected when they unwittingly intrude into the life cycle of the disease agent and become unnatural hosts. Zoonotic helminthic diseases, caused by parasitic worms, involve many species of helminths, including nematodes (roundworms), trematodes (flukes), cestodes (tapeworms), and acanthocephalans (thorny-headed worms). Helminthic zoonoses may be contracted from domestic animals such as pets, from edible animals such as seafood, or from wild animals. Fortunately, most kinds of zoonotic helminthic infections are caused by rare human parasites.

The best-recognized example of a food-borne zoonotic helminthic disease is trichinosis, caused by the trinchina worm, Trichinella spiralis, a tiny nematode. People commonly become infected by eating inadequately prepared pork, but a sizable proportion of victims now contract the worms by eating the meat of wild carnivores, such as bear. Trichinosis is usually a mild disease, manifested by symptoms and signs of intestinal and muscular inflammation, but in heavy infections damage done by the larvae to the heart and central nervous system can be life threatening. Because of public awareness about properly cooking pork and federal regulations about feeding pigs, trichinosis has become uncommon in the United States. People who eat inadequately prepared marine fish may become infected with larval nematodes. Of the many potential (and rare) helminthic zoonoses from wild animals in the United States, Baylisascaris procyonis is particularly dangerous. The nematode is highly prevalent in raccoons, the definitive host. See Medical parasitology, Nemata

McGraw-Hill Concise Encyclopedia of Bioscience. © 2002 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



infectious diseases whose causative agents adapted in the course of evolution to parasitism in certain animal species. Zoonoses include cattle plague, hog cholera, and pasteurellosis. Zoonoses may arise among human beings under certain sanitary and economic conditions that favor a given mechanism of transmission of the causative agent. However, the causative agents of zoonoses, in contrast to zooanthroponoses, cannot circulate among human beings. Man represents a biological dead end for them because he is not part of the epizootic process and does not participate in the causative agent’s evolution as a parasitic species.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Diseases which are biologically adapted to and normally found in lower animals but which under some conditions also infect humans.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Dado el alto nivel de enfermedades profesionales y AO registrados en la practica veterinaria en general y en nuestro pais en particular (2, 18), se planteo este trabajo con el objetivo de estimar la frecuencia de AO y zoonosis, la percepcion de riesgos (PR), y el uso de elementos de proteccion personal (EPP) en estudiantes de veterinaria de Argentina, asi como las asociaciones con potenciales factores de riesgo.
The word zoonosis originates from Greek words zoion (animal) and noses (disease) and is defined as the diseases transmitted from animals to humans are called as zoonotic diseases and the phenomena is called as zoonosis.1 The phenomena of zoonosis have been classified into direct and cyclozoonosis.2 Diseases transmitted either by infected vertebrate or with a fomite or any mechanical vector is called direct zoonosis.
Reverse Zoonosis. In fact, according to Armando Hoet, DVM, Ph.D., Director of the Veterinary Public Health Program at Ohio State University, reverse zoonosis is the main concern with staph infections.
Prof Malcolm Bennett, co-director of the UK National Centre for Zoonosis Research, Liverpool.
According to the World Health Organisation (WHO), Congo is a viral hemorrhagic fever of zoonosis nature (transmitted from animals to humans and vice-versa).
Interestingly, these HEV isolates from swine are genetically related to human isolates of India from 71.6 to 74.6 per cent indicating that a zoonosis may be a mode of transmission for HEV also in India.
between animal and human infectious disease (zoonosis).