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Echinococcus

  • Armando Gonzalez
  • Luis A. Gomez-Puerta
Chapter
Part of the Food Microbiology and Food Safety book series (FMFS)

Abstract

Cystic hydatid disease is a zoonotic disease caused by infection with the larval stage (hydatid cyst) of the tapeworm Echinococcus granulosus. The genus Echinococcus (Family: Taeniidae) are zoonotic helminth parasites (phylum Platyhelminthes, class Cestoda) with a worldwide distribution. The adult worm lives in the small intestine of suitable canids, felids, and hyenids laying eggs that are excreted with the feces of the animal and contaminating the environment. Susceptible intermediate host species that accidentally ingest infective eggs will develop the parasite’s larval stage or metacestode (Carmena and Cardona 2014). The life cycle of E. granulosus is similar to that of many other tapeworms that are transmitted between predator and prey, dogs, or other canids. Host animals are usually herbivores and ungulates. Humans may also harbor the intermediate form. Infection of an intermediate host is due to accidental ingestion of tapeworm eggs passed into the environment with feces from definitive hosts (Craig et al. 2015). Nevertheless, high environmental dog contamination index does not necessarily correspond to high prevalence in humans as transmission is strongly linked to human behavior and hygiene (Chaabane-Banaoues et al. 2015), the global public health impact of human CE is significant and is caused primarily by the G1 genotype (Budke et al. 2006).

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Center for Global Health TumbesUniversidad Peruana Cayetano HerediaTumbesPeru
  2. 2.Department of Veterinary Epidemiology and Economics, School of Veterinary MedicineUniversidad Nacional Mayor de San MarcosLimaPeru
  3. 3.Center for Global Health TumbesUniversidad Peruana Cayetano HerediaTumbesPeru

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