Which of the following animals is not responsible for the transmission of rabies?

Appeared in: MP NHM CHO-2024 (Shift-2)

Explanation

Rabies is a viral disease that almost exclusively affects mammals, which are warm-blooded animals.
Snakes are cold-blooded reptiles and are not susceptible to the rabies virus, meaning they cannot contract or transmit the disease.
The biological characteristics of the rabies virus restrict its hosts to the mammalian class.

Option A: Dogs are the most common source of human rabies transmission globally, accounting for over 90% of cases, especially in Asia and Africa.
Option B: Cats are mammals that can be infected with and transmit rabies. In the United States, more rabid cats are reported annually than rabid dogs.
Option C: Bats are a major wildlife reservoir for rabies, especially in the Americas. They are responsible for most human rabies deaths in the United States.

Visual 1: Infographic: A chart showing common rabies vectors (dogs, bats, raccoons, skunks, cats) versus non-vectors (reptiles, birds, fish, amphibians).
Visual 2: Diagram: The rabies transmission cycle, illustrating how the virus moves from an infected mammal's saliva to a new host through a bite.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Rabies virus transmission and animal vectors as background academic context rather than a clinical decision trigger.
Understanding which animals transmit rabies is critical for nurses when assessing a patient after an animal bite to determine the need for post-exposure prophylaxis (PEP).
Patient education is a key nursing role, including advising the public to avoid contact with wild animals and to ensure domestic pets are vaccinated against rabies.
What if? If a patient is bitten by a squirrel or mouse, PEP is generally not recommended, as rabies is extremely rare in small rodents. However, if bitten by a bat, raccoon, or skunk, PEP is almost always indicated unless the animal is captured and tests negative.

How to Approach the Question

First, identify the core of the question: it asks which animal does NOT transmit rabies. The keyword 'NOT' is crucial and inverts the logic.
Second, recall the basic biology of rabies: it is a viral disease that affects mammals.
Third, evaluate each option by classifying the animal. Dog (mammal), Cat (mammal), Bat (mammal), Snake (reptile).
Fourth, identify the outlier in the group. The snake is the only non-mammal listed.
Conclude that the snake, being a reptile, cannot transmit rabies, making it the correct answer to this negatively framed question.

Concept Tested & Keywords

Concept Tested: Rabies virus transmission and animal vectors
Stem keywords: rabies, transmission, animal
Lead-in keywords: not responsible
Negative lead-in flag: The question asks to identify the animal that is NOT a vector for rabies.

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Practise the full MP NHM CHO-2024 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.