Hearing Impairments in Consanguineous Marriage
September 2004 - Number 2 (6 صفحه - از 9 تا 14)
Consanguineous marriage is strongly favored in many large human populations. In the most parts of south Asia, consanguineous marriage account for 20% to over 50% of the general population. The effect of consanguinity on hereditary deafness has been well studied and documented. Many authors have suggested that approximately one half of sensory neural hearing loss in children can be attributed to hereditary causes. This research was carried out in Rehabilitation Deputy of welfare organization of Iran in seven provinces. 1352 infants and preschool aged children participate in this research. The prevalence of SNHL due to consanguineous marriage in first cousin and second cousin were studied. Consanguinity was found among 45.7% in first cousin and 17.2% in second cousin. Hereditary Factors were thought to be the cause of 863(62.9%) of bilateral SNHL children in this research. The incidence of hereditary hearing impairment is very high in developing countries compared to developed countries. Prevention is essential to reduce the incidence of genetic hearing loss. Consanguinity should be discouraged and genetic counseling is to be applied at least for those at risk of developing genetic diseases including hearing impairments.خلاصه ماشینی:
"Hearing impairments in consanguineous marriage Younes Lotfi ,MD University of Social welfare and Rehabilitation Sciences Saeideh mehrkian Master degree in audiology Abstract: is strongly favored in many large human populations. Many authors have suggested that approximately one half of sensory neural hearing loss in children can be attributed to hereditary causes. The siblings of consanguineous marriages have a significantly higher incidence of hereditary disease including hearing impairments (4). It consisted of information regarding age, sex, consan- guinity of parents, family history of deaf- ness, hearing and speech deficits and exposure to various known risk factors for hearing impairment. Many authors have suggested that approx- imately one half of sensory neural hearing loss in children can be attributed to heredi- tary causes (6). 1 per- cent hereditary deafness in 168 children with sensory neural hearing loss in his first study and 36. A. study of the causes of hearing loss in population of deaf children with special reference to genetic factors ."
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