Epidemiology of Infectious Disease

4. The presence of a living infectious agent on the body’s exterior surface, upon which a local reaction may be invoked
6. The capacity of an agent to enter and multiply in a susceptible host and produce infection or disease
8. Refers to an agent’s capacity to induce disease in the host
9. Infectious diseases that are potentially transmittable to humans by vertebrate animals
11. A person (or animal) who permits lodgment of an infectious disease agent under natural conditions
14. Concerns the resistance of the host to a disease agent
16. The domain external to the host in which the agent may exist, survive, or originate
17. Act as insect vectors that carry a disease agent from its reservoir to humans
19. The capacity of the agent to cause overt disease in the infected host

1. Refers to the capacity of the agent to produce a toxin or poison
2. The medium that contains the agent
3. An inanimate object laden with disease-causing agents
5. The ability of the agent to induce antibody production in the host
7. Agents multiply on the surface of the body without invoking tissue or immune response
10. Include intestinal parasites such as roundworms, pinworms, and tapeworms
12. A genus of bacteria that can grow within cells
13. A living insect or animal involved with the transmission of a disease agent
15. Cause diseases such as coccidioidomycosis, ringworm, and athlete’s foot
18. The ability of the agent to survive adverse environmental conditions