Diseases of The Ear
External otitis is also known as: [DNB Dec 2011]
|B||Malignant otitis externa|
Humidity and hot climate are one of the predisposing factors for otitis externa. Hence -otitis extern a is also k/a Singapore ear (where climate is hot & humid) or Telephonist ear as talking on phone causes humidity around ear) or Swimmers ear.
Pseudomonas aeruginosa is a normal inhibitant of external ear. Its numbers are kept in balance by the normal acidity of EAC. Prolonged swimming or abusive use of cotton typed ear buds can alter the pH, producing a more basic nvironment in which pseudomonas grows rapidly.