A diagram showing the host/parasite continuum

FIGURE WO-27The “host–parasite” continuum

The host–parasite ecological continuum (in this context “parasites” include viruses and parasitic prokaryotes). Most emerging diseases exist within a host and parasite continuum between wildlife, domestic animal, and human populations. Few diseases affect exclusively any one group, and the complex relations between host populations set the scene for disease emergence. Examples of emerging infectious diseases that overlap these categories are canine distemper (domestic animals to wildlife), Lyme disease (wildlife to humans), cat scratch fever (domestic animals to humans), and rabies (all three categories). Arrows denote some of the key factors driving disease emergence.

SOURCE: From Daszak, P., A. A. Cunningham, and A. D. Hyatt. 2000. Emerging infectious diseases of wildlife—Threats to biodiversity and human health. Science 287(21):443-449. Reprinted with permission from AAAS. http://www.sciencemag.org/content/287/5452/443.full.html.

From: Workshop Overview

Cover of Improving Food Safety Through a One Health Approach
Improving Food Safety Through a One Health Approach: Workshop Summary.
Institute of Medicine (US).
Washington (DC): National Academies Press (US); 2012.
Copyright © 2012, National Academy of Sciences.

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