What bacteria is commonly associated with bacterial conjunctivitis?

Bacterial conjunctivitis, often referred to as "pink eye," is primarily caused by a variety of bacteria, and Staphylococcus aureus is one of the most common pathogens associated with this condition. Staphylococcus aureus can easily infect the conjunctiva due to its ubiquitous presence on the skin and mucous membranes.

This bacterium is particularly notable because it can cause more severe forms of conjunctivitis, potentially leading to complications like corneal ulcers if not treated properly. The versatility of Staphylococcus aureus in causing infections and its ability to form biofilms are factors that contribute to its prominence as a causative agent in conjunctivitis cases.

While Pseudomonas aeruginosa is indeed a significant pathogen, particularly in contact lens wearers or those with compromised ocular surfaces, it is less frequently the initial cause in the general population compared to Staphylococcus aureus. Escherichia coli and Streptococcus pyogenes are associated with specific situations, such as neonatal conjunctivitis or certain skin infections, but are not as commonly linked to conjunctivitis overall.