**Question:** All the following are modes of transmission of rabies, EXCEPT:

A. Direct contact with an infected animal's saliva
B. Inhalation of infected dust or aerosols
C. Transmission through blood transfusion
D. Transmission through ingestion of contaminated food or water

**Core Concept:** Rabies is a viral disease primarily transmitted through the nervous system, either through direct contact with an infected animal's saliva, or indirectly through contact with infected body fluids or tissues. Rabies virus can also be transmitted through aerosols, ingestion of contaminated food or water, and transmission through blood transfusion.

**Why the Correct Answer is Right:** The correct answer is **C.** Transmission through blood transfusion is incorrect because rabies virus is not typically found in the blood of infected animals. Rabies is primarily transmitted through direct contact with infected saliva or indirectly through contact with infected body fluids or tissues.

**Why Each Wrong Option is Incorrect:**

**A.** Direct contact with an infected animal's saliva: This is the primary mode of transmission for rabies, as the virus enters the body through the mucous membranes or broken skin.

**B.** Inhalation of infected dust or aerosols: Rabies virus can be aerosolized and inhaled, leading to respiratory infection, but the primary mode of transmission remains direct contact with infected saliva or contact with infected body fluids.

**D.** Transmission through ingestion of contaminated food or water: Rabies virus can survive in contaminated food or water, leading to oral infection. However, the primary mode of transmission is direct contact with infected saliva or contact with infected body fluids.

**Clinical Pearl:** To prevent rabies, it is essential to practice safe handling of animals, avoid contact with animal bites, and ensure proper vaccination and treatment of animal bites. Prompt post-exposure prophylaxis (PEP) is crucial after an animal bite to reduce the risk of rabies infection.

**Correct Answer:** C. Transmission through blood transfusion is incorrect because rabies virus is not typically present in the blood of infected animals. Rabies is primarily transmitted through direct contact with infected saliva or indirectly through contact with infected body fluids or tissues.