You are explaining to your patient about epidemic typhus. He wants to know how he could have got infected with the disease. All the following are TRUE regarding transmission of epidemic typhus, EXCEPT:

**Core Concept**
Epidemic typhus, also known as **louse-borne typhus**, is a disease caused by the bacterium **Rickettsia prowazekii**. The primary mode of transmission is through the **human body louse**.

**Why the Correct Answer is Right**
The correct answer is related to the fact that epidemic typhus is primarily spread by the **human body louse**, which becomes infected when it feeds on the blood of a person with acute epidemic typhus.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the disease can indeed be transmitted through the bites of infected lice.
**Option B:** This option is incorrect because infected lice can also transmit the disease through their feces.
**Option C:** This option is incorrect because the disease can be spread by the feces of infected lice coming into contact with human skin.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that epidemic typhus is often associated with poor hygiene and **crowding**, which facilitates the spread of the infected lice.

**Correct Answer:** D. Direct person-to-person transmission is the exception, as epidemic typhus is primarily transmitted through lice. **Correct Answer: D.**

✓ Correct Answer: A. It may be transmitted by getting bitten by an infected louse