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A parasite that lives on the exterior of its host.



a parasitic organism that lives on the surface of the body of the host. Ectoparasites make up the largest group of organisms that live on the surface of other organisms. Some ectoparasites are permanently attached to the host, such as copepods living on the skin and gills of fish. However, most move along the host’s body, for example, Urcelariidae and monogenetic flatworms, which parasitize fish, and lice and bird lice, which parasitize birds and occasionally mammals. Various and frequently complex organs of attachment, such as suckers, suction disks, and hooks, are the principal means by which they adapt to existence on the host.

References in periodicals archive ?
During handling of animals, ectoparasite loads were evaluated visually; ears were inspected for ticks and mites, and fleas were removed by hand while searching the body, but concentrating on neck and abdominal areas.
The effect of nest ectoparasite abundance on Cliff Swallow colony site selection, nestling development, and departure time.
Integumental lesions caused by ectoparasites in a wild population of the side-blotched lizard (Uta stansburiana).
We suggest future investigations attempt a comprehensive nest and ectoparasite examination, instead of focusing solely on C.
As a result of these efforts, we recently developed Seresto, a new product from Bayer Animal Health that offers a significant new step in the long-term management of ectoparasite threat in both dogs and cats and that we think gives the promise of a paradigm shift in the management of CVBDs.
Male hosts usually have greater intensities of ectoparasites than female hosts (Zuk, 1990; Zuk and McKean, 1996; Roberts et al.
Prevalence of one Dipteran ectoparasite (Philornis porteri) on Northern Mockingbirds (Mimus polyglottos) was not directly related to urbanization in Florida (Le Gros et al.
The three species of Sceloporus had ectoparasites in the neck region, inside folds behind the eardrums (Fig.
Abstract: As part of a larger ecologic research project and to collect disease prevalence information on backyard chicken flocks in northwestern Ecuador, 100 randomly selected birds from 10 flocks were examined, and blood, fecal, and ectoparasite samples were collected.
We have described the detailed protocols, including bat sampling for peripheral blood, fecal droppings, and ectoparasites; metagenomic analysis of fecal DNA; isolation of Bartonella from peripheral blood; extraction of DNA from bat blood, ectoparasites, and Bartonella isolates; Bartonella and ectoparasite PCR analyses; transmission electron microscopy; and nucleotide sequence and phylogenetic analyses in the online Technical Appendix (wwwnc.