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ODHHS Information
5 Common Causes of Deafness
1. Rubella
  • between 1963 - 65 : 40 - 80% (North American)
  • visual problems, heart defects
  • adults - 25 years old
2. Heredity
  • leading cause of deafness throughout this century : 50 - 60%
  • occurs in 1/2,000
  • 90% of genetic deafness : carried by a recessive gene
  • fewer defects
3. Premature Birth
  • lack of oxygen and cerebral hemorrhage which can damage the nervous system
4. Complications of Rh Factor
  • blood type incompatibility between mother (-) and the child (+)
  • 80% - partial hearing loss
  • 50% - cerebral palsy
5. Meningitis
  • high number at age four - males - 4 to 10 times than in females

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