Final answer:
Bacterial conjunctivitis involves purulent discharge and might require topical antibiotics, while viral conjunctivitis is associated with a watery discharge and resolves on its own. Allergic conjunctivitis arises from allergens and is treated with anti-allergy medications.
Step-by-step explanation:
Comparing bacterial conjunctivitis, viral conjunctivitis, and allergic conjunctivitis is crucial for appropriate treatment (Tx). Bacterial conjunctivitis is characterized by inflammation of the conjunctiva with a purulent discharge, commonly caused by Haemophilus influenzae, Staphylococcus aureus, or Streptococcus pneumoniae. It is highly contagious but typically resolves in a few days, though topical antibiotics may be prescribed to aid recovery and prevent spread.
Viral conjunctivitis often accompanies a cold or upper respiratory infection and presents with a more watery discharge. It is also contagious, and while it does not respond to antibiotics, symptoms usually resolve without treatment within one to two weeks.
Allergic conjunctivitis is caused by allergens such as pollen and is not contagious. Treatment includes avoiding allergens and may involve antihistamines or other anti-allergy medications.