Biology:Deaf animal
Some strains of animals, such as white cats, have a tendency to congenital deafness.[1] Some known chemicals and elements can also affect deafness in animals.[2]
Deafness can occur in almost any breed of cat or dog. This includes both pure-breed and mixed-breed animals, although there may be more prevalence in some specific breeds.[3]
"The association between patterns of pigmentation and deafness in the dog has a long-documented history, with reports dating back over one hundred years. Long suspected of having a genetic basis, the search for loci with a pronounced influence in the expression of hearing loss in the dog has yet to be successful."[4]
Deafness in animals can occur as either unilateral (one ear affected) or bilateral (both ears affected). This occurrence of either type of deafness seems to be relatively the same in both mixed-breed animals and pure-breed animals.[5]
Research has found a significant association between deafness in dogs and the pigment genes piebald and merle. Although merle dogs seem to have higher occurrences of both deafnesses than some other breeds, this research also showed that they had lower occurrences than others. So still there is more to be known about the causes of deafness in animals such as dogs.[6]
Common misconceptions may lead potential owners to believe that deaf dogs may be more likely to have an unpleasant disposition, or that the condition implies other brain abnormalities. Many people have successfully raised and trained deaf animals. Teaching a deaf dog may present unusual challenges, but inventiveness can overcome many of them. For example, when on a walk with a deaf dog, a laser pointer could be used to attract the animal's attention.[7]
See also
References
- ↑ Suga, F; Hattler, K. W. (1970). "Physiological and histopathological correlates of hereditary deafness in animals". The Laryngoscope 80 (1): 81–104. doi:10.1288/00005537-197001000-00007. PMID 5411826.
- ↑ Nakai, Yoshiaki; Nakai, Sumiko (1971). "Ototoxic effect of nitromin and some congenital deaf animal cochlea. An electron microscopical study". Archiv für Klinische und Experimentelle Ohren- Nasen- und Kehlkopfheilkunde 198 (3): 325–38. doi:10.1007/BF00316933. PMID 4255010.
- ↑ Strain, G. M. (2010, October 5). DEAFNESS IN DOGS & CATS [Reference Site]. Retrieved October 10, 2010, from Louisiana State University website: http://www.lsu.edu/deafness/deaf.htm
- ↑ Famula, Thomas R; Cargill, Edward J; Strain, George M (2007). "Heritability and complex segregation analysis of deafness in Jack Russell Terriers". BMC Veterinary Research 3: 31. doi:10.1186/1746-6148-3-31. PMID 17999773.
- ↑ Cvejic, D; Steinberg, T. A.; Kent, M. S.; Fischer, A (2009). "Unilateral and bilateral congenital sensorineural deafness in client-owned pure-breed white cats". Journal of Veterinary Internal Medicine 23 (2): 392–5. doi:10.1111/j.1939-1676.2008.0262.x. PMID 19192155.
- ↑ Strain, G. M.; Clark, L. A.; Wahl, J. M.; Turner, A. E.; Murphy, K. E. (2009). "Prevalence of deafness in dogs heterozygous or homozygous for the merle allele". Journal of Veterinary Internal Medicine 23 (2): 282–6. doi:10.1111/j.1939-1676.2008.0257.x. PMID 19192156.
- ↑ Wilkes, Gary. "Why the Deaf Dog Barks". http://www.clickandtreat.com/dfogb5.htm.
Further reading
- FAQ: Deaf Animals from Gallaudet University
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