Average number of mites found on the body in a person suffering from scabies is?
## **Core Concept**
Scabies is a skin infestation caused by the mite *Sarcoptes scabiei var. hominis*. The condition is characterized by intense itching and a pimple-like skin rash. The mites burrow into the upper layer of the skin, where they lay eggs.
## **Why the Correct Answer is Right**
The average number of mites found on the body in a person suffering from scabies is typically around 10-15. This relatively small number of mites can cause significant symptoms due to the host's immune response to the mites, their eggs, and their burrowing activity. The low mite burden is why scabies is often considered a condition where the host's reaction to the parasite is more significant than the direct damage caused by the parasite itself.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because the number provided does not match the known average.
- **Option B:** This option suggests a much higher number than what is typically found.
- **Option D:** This option suggests a range or a single number that does not align with the established average.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that even though the number of mites is usually low, scabies can still cause significant discomfort and requires treatment to prevent spread and complications. A classic clinical correlation is that scabies infestation can lead to secondary bacterial infections due to scratching.
## **Correct Answer:** B. 10-15.