8 Questions
Which disease is caused by Pasteurella tularensis?
Tularemia
Which of the following mechanisms does not transmit Rocky-mountain spotted fever?
Coxal fluid contaminates bite wound
Which type of life cycle do Rickettsiae exhibit in their tick vector?
Propagative
What is the primary mode of transmission for Lyme disease?
Nymph bite
Which disease is transmitted through both coxal fluid contamination and transovarian pathway?
Endemic relapsing fever
Tick-borne encephalitis is caused by:
Tick-borne encephalitis (TBE) virus
Which control method helps prevent tick-borne diseases?
Repairing cracks
Babesia microti is transmitted through:
Nymph bite
Study Notes
Disease Transmission by Hard Ticks
- Rickettsial diseases are transmitted by hard ticks through saliva contaminating the bite wound (anterior station) and feces contaminating the bite wound (posterior station), with a transovarian transmission mechanism.
- Rocky-mountain spotted fever is caused by Rickettsia rickettsia and has a propagative life cycle in its tick vector.
- Q-fever is caused by Coxiella burneti and has a propagative life cycle in its tick vector.
- Tularemia is caused by Pasteurella tularensis and is transmitted through a propagative mechanism via bite (anterior station).
- Tick-borne Encephalitis (TBE) is caused by TBE virus and is transmitted through a propagative mechanism via bite (anterior station).
- Lyme disease is caused by Borrelia burgdorferi and is transmitted through a propagative mechanism via nymph bite (anterior station).
- Babesiosis is caused by Babesia microti and B.divergens and is transmitted through a cyclopropagative mechanism via nymph bite (anterior station).
Disease Transmission by Soft Ticks
- Endemic relapsing fever is caused by Borrelia duttoni and is transmitted through a propagative mechanism, with coxal fluid contaminating the bite wound (crushing) and transovarian transmission.
- Q fever is also caused by Coxiella burneti in soft ticks.
Prevention and Control of Tick-borne Diseases
- Repairing cracks can help prevent tick-borne diseases.
- Spraying insecticides on floors and cracks can help control tick populations.
- Dusting animals can also help control tick populations.
This quiz covers diseases transmitted by hard ticks, including Rickettsial and Bacterial diseases, such as Rocky Mountain spotted fever and Q-fever. It also explores the mechanisms of transmission, including saliva and fecal contamination.
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