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Trends Immunol. 2014 Oct;35(10):457-64. doi: 10.1016/ Epub 2014 Sep 22.

Infection-avoidance behaviour in humans and other animals.

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The Hygiene Centre, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 4HT, UK.


Compared with living free, the parasitic way of life has many attractions. Parasites create problems for all animals. Potential hosts can respond by learning to live with parasites (tolerance), actively fighting them (resistance), or they can avoid becoming infected in the first place (avoidance). I propose here a new classification of avoidance behaviour according to the epidemiology of infection risk, where animals must avoid (i) conspecifics, (ii) parasites and their vectors, (iii) parasite-rich environments, and (iv) niche infestation. I further explore how the disgust adaptive system, which coordinates avoidance behaviour, may form a continuum with the immune system through the sharing of signalling pathways, sites of action, and evolutionary history.


avoidance; behaviour.; disgust; hygiene; infection; sanitation

[Indexed for MEDLINE]

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