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Date of preparation: March 2018

How can bacteria spread from person-to-person?

Bacteria can easily spread from person-to-person in close contact settings such as daycare centres. 1

Children can transmit bacteria via aerosol, droplets, or direct contact with respiratory secretions of someone carrying the bacteria. 2 3
If these bacteria infect the middle ear, they can cause acute otitis media. 4


  1. Daly KA, et al. Epidemiology of otitis media onset by six months of age. Pediatrics. 1999; 103:(6 Pt 1): 1158-66.
  2. New York Department of Health. Ear infections in children. Available at: [Last accessed June 2014].
  3. Department of Health. Chapter 25: Pneumococcal. In: Salisbury DS, Ramsey M, Noakes, eds. Immunisation against infectious disease [Green book]. London; The Stationary Office; 2006: 295–313.
  4. Cripps A, et al. Bacterial otitis media: a vaccine preventable disease? Vaccine 2005; 23: 2304–10.


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