Cause of Pink Eye

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Most common cause of pink eye is a viral infection but it can also be bacterial in origin, allergens, or other substances that causes irritation to the eyes. Bacterial and viral cause of pink eye is most of the time contagious. It is advisable to avoid sharing personal belongings specially the ones used in the eyes or the face.

The most common cause of pink eye due to virus is adenoviruses. It can also be caused by Herpes simplex virus often causes a type of viral pink eye known as herpetic keratoconjunctivitis which is a serious condition that needs treatment of acyclovir. Another cause of pink eye is enteroviruses like the Coxsackeivirus A24 and Enterovirus 70. Both of these viruses that causes pink eye is highly contagious and should be treated immediately.

Bacterial cause of pink eye is often associated with Staphyloccocus or Streptococcus bacteria. The most common symptom in bacterial pink eye are swelling of the eye, eye pain, redness, itching, swelling of the lymph node in the ears and a moderate eye discharge that is usually thick and yellowish in color.

Chlamydia is also one of the causes of pink eye in the United States. It is also very common in eastern countries and Africa. Chlamydia causes pink eye in the neonates and also in adults. It is usually treated with Erythromycin or Tetracycline. It is however not given to children less than 8 years old since it causes discoloration of the teeth.

Another cause of pink eye is allergen or a chemical substance that irritates the membranes of the eye which causes the pinkish to reddish discoloration of the eye. It is advisable to seek immediate treatment when the cause of the pink eye is a chemical substance to prevent further damage to the eyes. Allergens that causes pink eye should be avoided.