ENT 201 Lecture Notes - Lecture 11: Rickettsia, Spotted Fever, Deet
Document Summary
Disease- negative response of the host to the agent (illness) Agent - pathogen responsible for infection (virus, bacterium, etc) Vector - the organism (insect, mite, tick) that transmits the agent from an infected host to non-infected host. Reservoir - host animals that harbors (maintains) the agent for long periods of time, often with no symptoms of the disease. Mechanical transmission - disease agent piggy-backs on vector i. Biological transmission - some part of disease agents life cycle in vector i. ii. Injected during lbood meal or frass rubbed into bite. Lyme disease - discovered in u. s. in 1975 i. ii. Reservoir - wild animals ( white footed mice; white tailed deer?) Symptoms - fatigue, headache, stiff neck, muscle ii. Symptoms - fatigue, headache, stiff neck, muscle ache, fever, chills within 2 weeks. Bull"s eye rash on 50-80% of people within 30 days b. iii. We nc have most cases of rocky mtn spotty fever in piedmont and foothills iv.
