Questions: Select all that apply Conjunctivitis, or "pink eye," is usually caused by what types of infection? Bacterial Protozoan Viral Fungal

The answer is:

• Bacterial
• Viral

Explanation for each option:

1. Bacterial: Correct. Bacterial infections are a common cause of conjunctivitis. Bacteria such as Staphylococcus aureus, Streptococcus pneumoniae, and Haemophilus influenzae can lead to this condition.
2. Protozoan: Incorrect. Protozoan infections are not a common cause of conjunctivitis. They are more typically associated with other types of infections, such as those affecting the gastrointestinal system.
3. Viral: Correct. Viral infections are another common cause of conjunctivitis. Viruses such as adenoviruses are frequently responsible for this condition.
4. Fungal: Incorrect. Fungal infections are a rare cause of conjunctivitis. They are more likely to cause other types of eye infections, such as keratitis.

Summary: Conjunctivitis, or "pink eye," is usually caused by bacterial or viral infections.