Table: Acquired cases—Hearing defect due to:—
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Acquired cases —Hearing defect due to:—
Post-suppurative otitis media Grade I 35 „ IIa 17 „ IIb 20 „ III 7 — 79 Suppurative otitis media (unknown origin) „ I 12 „ IIa 7 „ IIb 6 „ III 2 — 27 Suppurative otitis media (due to infectious disease) „ I 2 „ IIa 3 „ IIb 10 „ III 1 — 16 Suppurative otitis media (due to other known causes) I 2 „ IIa 2 „ IIb 1 „ III 1 — 6 Middle ear catarrh (due to various causes) „ I 51 „ IIa 10 „ IIb 9 „ III 1 — 71 Suppurative otitis media of one ear and middle-ear catarrh of the other „ I 11 „ IIa 3 „ IIb 3 — 17 Wax „ I 1 Meningitis „ IIb 1 „ III 3 — 4 Nerve deafness due to infectious fevers „ I 1 „ IIa 1 „ IIb 11 „ III 10 — 23 Congenital syphilis „ III 1 Mixed deafness due to infectious disease „ IIb 1 Congenital cases. True hereditary deafness I 1 „ III 9 — 10 Sporadic deaf birth „ III 27 Uncertain origin „ IIb 3 „ III 10 — 13 Aphasia „ III 1 Found to be not defective as regards hearing, but M.D. „ 5
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There are 392 children in schools for the deaf, and 135 in those for the partially
