## **Core Concept**
Acute hemorrhagic conjunctivitis (AHC) is a severe and highly contagious form of conjunctivitis characterized by sudden onset of painful, swollen, and red eyes with subconjunctival hemorrhages. It is primarily caused by viral infections. The condition can lead to significant morbidity and, in some cases, vision loss if not properly managed.

## **Why the Correct Answer is Right**
The correct answer, **Enterovirus 70** and **Coxsackievirus A24 variant**, are well-documented causes of acute hemorrhagic conjunctivitis. These viruses belong to the picornavirus family and are highly contagious. They cause AHC by infecting the conjunctiva, leading to inflammation and hemorrhages. The rapid spread of these viruses can occur through direct contact with an infected person's hands or contaminated surfaces.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because, although other viruses can cause conjunctivitis, they are not specifically associated with acute hemorrhagic conjunctivitis.
- **Option B:** This option is incorrect as it does not directly relate to a known cause of AHC.
- **Option D:** This option is incorrect because it is not a recognized cause of acute hemorrhagic conjunctivitis.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that acute hemorrhagic conjunctivitis can be caused by **Enterovirus 70** and **Coxsackievirus A24 variant**. These viral causes are important to identify because the condition is highly contagious and can lead to outbreaks. Proper hygiene and isolation measures are crucial in controlling the spread of the infection.

## **Correct Answer:** .