A Bit About Bostons. A cross between the English bulldog and the white English terrier, the Boston originated in Boston, Massachusetts in the late 19th century. Not larger than 25 pounds, the dog is muscular, alert and intelligent, and has an easygoing personality. That said, heart disease is the leading cause of death in this breed.
Many children are born deaf because of a genetic reason. Deafness can be passed down in families even though there appears to be no family history of deafness. Sometimes the gene involved may cause additional disabilities or health problems. Deafness can also be caused by complications during pregnancy. Illnesses such as rubella, cytomegalovirus (CMV), toxoplasmosis and herpes can cause a child to be born deaf.
1 Sensorineural hearing loss-hearing loss is caused by dysfunction of the inner ear, the cochlea, auditory nerve, or brain damage. 2  Usually, this kind of hearing loss is due to damage of the hair cells in the cochlea.3  As humans get older, the hair cells lose some of their function, and our hearing gets worse.nilateral deafness (single-sided deafness or SDD) refers to just one ear, while bilateral means a hearing impairment in both. People with unilateral hearing impairment may find it hard to carry on a conversation if the other person is on their deaf side.