Conjunctivitis (or pink eye) is an inflammation of the conjunctiva (the outermost layer of the eye and the inner surface of the eyelids), most commonly due to an allergic reaction or an infection.
Some forms of conjunctivitis are extremely contagious while others are not. It all depends on the etiological cause.
These are:
Bacterial conjunctivitis
Bacterial conjunctivitis is an infection caused by bacteria such as staphylococci, streptococci or haemophilus. These organisms may come from the patient's own skin or upper respiratory tract or they may be caught from another person with conjunctivitis.
Viral conjunctivitis
Viral conjunctivitis is often associated with the common cold. This may be caused by a virus called 'adenovirus'. This type of conjunctivitis can spread rapidly between people and may cause an epidemic of conjunctivitis.
Chlamydial conjunctivitis
This type of conjunctivitis is caused by an organism called Chlamydia trachomatis. This organism may also affect other parts of the body and can cause the venereal disease chlamydia .
Allergic conjunctivitis
Allergic conjunctivitis is common in people who have other signs of allergic disease such as hay fever, asthma and eczema. The conjunctivitis is often caused by antigens like pollen, dust mites or cosmetics.
Reactive conjunctivitis - chemical or irritant conjunctivitis
Some people are very susceptible to chemicals in swimming pools or to smoke or fumes and this can cause an irritation of the conjunctiva with discomfort, redness and watering. In such cases these irritants should be avoided.
However there are bacteria in farts so i guess you could get it that way.
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