at Tuskegee University

College of Veterinary Medicine


          Level I  › Infection Dynamics   ›  





Infection Dynamics


Review Questions

1. List the components of the cycle of transmission.
2. List the portals of exit and discuss their effect on the transmission and control of disease.
3. Differentiate between horizontal and vertical transmission.
4. List 4 routes of direct transmission and name infectious or noninfectious disease agents transmitted by each route.
5. Differentiate between direct and indirect transmission.
6. Differentiate between a vehicle and a vector.
7. Define propagative vehicle and tell why it has a grater disease producing potential than a non-propagative vehicle.
8. List 5 different types of vehicles encountered in disease transmission and name 2 diseases for which each vehicle is important.
9. Differentiate between internal and external carriage by a vector and give an example of each.
10. Explain the significance of the extrinsic incubation period.
11. List 3 types of agent changes which can occur in biologic vectors and give an example of each.
12. Differentiate transovarial from transstadial.
13. Differentiate between mechanical and biologic vectors and discuss the importance of this distinction.
14. Discuss the ways by which a vector can influence the geographic spread of an agent.
15. List the portals of entry and discuss their relationship to the signs and control of a disease.
16. Define serial interval and list the factors which determine the rate of spread of a disease.






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