Bacterial conjunctivitis is most commonly caused by Staphylococcus aureus, Haemophilus influenzae or Pseudomonas aeruginosa. The bacteria need a warm, moist environment to grow. Bacteria reproduce by binary fission. The rate depends on the type of bacteria, but for most it is very quickly. The vector is humans! More specifically, human hands. It spreads from person to person when someone touches the infected eye then touches another eye. The vector may also be towels, washcloths, etc. These also provide a warm, moist environment for the bacteria to grow on, so they are able to live a long time. The incubation period is 24 to 72 hours. The infection can be killed by antibiotics that the bacteria are sensitive to. Polymyxin, gentamicin, tobramycin, cyloxin, ocuflox and chibroxin are antibiotics that work well for bacterial conjunctivits. If there is significant inflammation of the eye, Tobradex is the drug of choice. Tobradex combines an antibiotic (tobramycin) with a steroid (dexamethasone). Hope this helps.
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