Multiple Choice
In the chain of infection, what is a reservoir host?
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25. Epidemiology
Reservoirs of Infection
Multiple Choice
The following answer choices list a disease followed by the primary organism(s) that carries that disease. Which of the following is not an example of a zoonotic disease?
A
Measles virus; humans.
B
Rabies virus; all mammal species.
C
Yersinia pestis (plague); rodents and fleas.
D
West Nile virus; birds and mosquitos.
Verified step by step guidance1
Step 1: Understand the definition of a zoonotic disease. A zoonotic disease is an infectious disease that can be transmitted from animals to humans.
Step 2: Review each disease and its primary organism(s) to determine if the disease is transmitted from animals to humans (zoonotic) or only between humans.
Step 3: Analyze 'Measles virus; humans.' Measles is a viral disease that is transmitted only between humans, with no animal reservoir involved, so it is not zoonotic.
Step 4: Analyze 'Rabies virus; all mammal species.' Rabies is transmitted from infected mammals to humans, making it a classic example of a zoonotic disease.
Step 5: Analyze 'Yersinia pestis (plague); rodents and fleas' and 'West Nile virus; birds and mosquitos.' Both involve animal reservoirs and vectors transmitting the disease to humans, confirming their zoonotic nature.
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