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Upper respiratory tract infection in the pharynx and tonsils can reach the middle ear ifthe infectious agents spread upwards along the Eustachian tubes. 6
Figure 35.3 Anatomy of the ear and its connection with the upper airways. (Source: WHO, 2006, Primary Ear and Hearing Care Training Resource: Trainer’s Manual – Intermediate Level, p.16)35.2.1 How does acute otitis media affect hearing?QuestionWhat effect do you think pus in the middle ear will have on normal hearing, and why?QuestionCan you recall which vaccine-preventable disease is transmitted by airborne droplets and may lead to acute otitis media (AOM) as one of its complications?End of answer7
Figure 35.4 Smoke from indoor cooking fires escapes from these traditional