CLINICAL MEDICINE

Detailed explanation-1: -Middle ear infections, which are the most common ear infections, are caused by a bacterium or virus that infects fluid that builds up in the middle ear. Ear infections are often a direct result of a common cold, allergy or other upper respiratory illness.

Detailed explanation-2: -Bacteria, like Streptococcus pneumoniae and Haemophilus influenzae (nontypeable) are the two most common bacteria causing middle ear infection. Viruses, like those that cause colds can cause middle ear infection.

Detailed explanation-3: -Causes of ear infections sudden changes in air pressure – such as during airline travel. smaller than average Eustachian tubes, or a blocked Eustachian tube. cleft palate. young age – babies and children are more prone to ear infections.

Detailed explanation-4: -Causes of otitis externa can include: a bacterial infection – usually by bacteria called Pseudomonas aeruginosa or Staphylococcus aureus.