Epidemiology Scavenger Hunt Find an example infectious disease for each of the term(s) or concept(s) below. Give the name of the disease and its causal agent and whether it is viral , prion, bacterial, fungal, protozoan, or helminthic. All of the diseases must be infectious diseases. 12. Concerning epidemics - give an example of a disease that has a common source. 13. Concerning epidemics – give an example of a disease that has a propagated source 14. Give an example of a notifiable viral infectious disease. 15. Give an example of a disease with a seasonal occurrence. Why is it seasonal? Solution Aids - the casual agent is HIV it is a viral disease... Malaria - the casual agent is Plasmodium.. It is a protozoa disease.. Typhoid- the agent is bacteria.. It is a bacterial disease.. Candiasieies - the agent is fungi...!! 14) Chikenpox is a type of viral disease which can be easily noted by seeing the symptoms on the body in their initial stage.. 15) the answer is common cold.. It occurs in a specified season hence seasonal disease...