Parasites in Captive Animals: A Review of Studies in Some European Zoos

There are a number of specific characteristics in the system parasites–zoos and lots of studies in this connection have been carried out. In the present work a literature review of the parasitological investigations performed in some European zoos is presented. The summing-up and analyses of the literature data gave us grounds for drawing the following conclusions: Helminths represent the most frequently reported parasites in the animals inhabiting Europe's zoos. According to the frequency of the reports the most widely-spread among the helminths are the nematodes, followed by the cestodes and trematodes. The nematodes are most often represented by those of the Ascaridida order followed by Strongylida, Enoplida (Trichuridae, Capillariidae), Oxyurida and Rhabditida. Protozoa rank second after the nematodes according to the frequency of reports. The ones affecting the gastrointestinal tract and developing without intermediary hosts are most often established (Cryptosporidium, Giardia, Eimeria). Often parasites causing zoonoses are recorded in the zoo animals. Most often these are primates with the nematodes from the genera Trichuris, Ascaris, Strongyloides and Enterobius being the most common zoonoses agents.