A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves
Nature and cause of ocular dermoids were investigated by field studies, pedigree analysis, clinical examination and light microscopy. It was determined that ocular dermoids in cross-bred calves are genetically-transmitted defects. Calves typically were affected unilaterally or bilaterally with multi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Tripoli University
2012-04-01
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| Series: | Open Veterinary Journal |
| Subjects: | |
| Online Access: | http://www.openveterinaryjournal.com/2012/OVJ-052-11-11%20M.M.%20Alam%20and%20M.M.%20Rahman.pdf |
| _version_ | 1818582064119676928 |
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| author | M.M. Rahman M.M. Alam |
| author_facet | M.M. Rahman M.M. Alam |
| author_sort | M.M. Rahman |
| collection | DOAJ |
| description | Nature and cause of ocular dermoids were investigated by field studies, pedigree analysis, clinical examination and light microscopy. It was determined that ocular dermoids in cross-bred calves are genetically-transmitted defects. Calves typically were affected unilaterally or bilaterally with multiple, connected ocular growths that clinically and histologically mimicked normal haired skin. Sites most commonly involved included ventro-lateral limbus, third eyelid, medial canthus, eyelid and conjunctiva. Centro-corneal and anterior segmental dermoids were also observed. It is postulated from this study that bilateral ocular dermoids are genetically-transmitted defects in Hereford cattle. Characteristics of both autosomal recessive and polygenic inheritance were observed. However, mode of inheritance and role of environment in the pathogenesis of these peculiar and important developmental defects remain undefined. Extensive breeding trials utilizing superovulation, embryo transfer, and pre-terminal caesarean section as well as further field studies might be mandatory to confirm sex incidence, significance of associated somatic defects, role of environment in phenotypic expression, and mode of transmission of ocular dermoids in cross-bred calves. |
| first_indexed | 2024-12-16T07:43:26Z |
| format | Article |
| id | doaj.art-af16bd44164b4b0493c7ba9eb9429122 |
| institution | Directory Open Access Journal |
| issn | 2218-6050 |
| language | English |
| last_indexed | 2024-12-16T07:43:26Z |
| publishDate | 2012-04-01 |
| publisher | Tripoli University |
| record_format | Article |
| series | Open Veterinary Journal |
| spelling | doaj.art-af16bd44164b4b0493c7ba9eb94291222022-12-21T22:39:02ZengTripoli UniversityOpen Veterinary Journal2218-60502012-04-0121014A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calvesM.M. RahmanM.M. AlamNature and cause of ocular dermoids were investigated by field studies, pedigree analysis, clinical examination and light microscopy. It was determined that ocular dermoids in cross-bred calves are genetically-transmitted defects. Calves typically were affected unilaterally or bilaterally with multiple, connected ocular growths that clinically and histologically mimicked normal haired skin. Sites most commonly involved included ventro-lateral limbus, third eyelid, medial canthus, eyelid and conjunctiva. Centro-corneal and anterior segmental dermoids were also observed. It is postulated from this study that bilateral ocular dermoids are genetically-transmitted defects in Hereford cattle. Characteristics of both autosomal recessive and polygenic inheritance were observed. However, mode of inheritance and role of environment in the pathogenesis of these peculiar and important developmental defects remain undefined. Extensive breeding trials utilizing superovulation, embryo transfer, and pre-terminal caesarean section as well as further field studies might be mandatory to confirm sex incidence, significance of associated somatic defects, role of environment in phenotypic expression, and mode of transmission of ocular dermoids in cross-bred calves.http://www.openveterinaryjournal.com/2012/OVJ-052-11-11%20M.M.%20Alam%20and%20M.M.%20Rahman.pdfCross-bred calvesDermoid cystsIncidenceOcular dermoidsSurgical intervention |
| spellingShingle | M.M. Rahman M.M. Alam A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves Open Veterinary Journal Cross-bred calves Dermoid cysts Incidence Ocular dermoids Surgical intervention |
| title | A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves |
| title_full | A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves |
| title_fullStr | A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves |
| title_full_unstemmed | A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves |
| title_short | A three years retrospective study on the nature and cause of ocular dermoids in cross-bred calves |
| title_sort | three years retrospective study on the nature and cause of ocular dermoids in cross bred calves |
| topic | Cross-bred calves Dermoid cysts Incidence Ocular dermoids Surgical intervention |
| url | http://www.openveterinaryjournal.com/2012/OVJ-052-11-11%20M.M.%20Alam%20and%20M.M.%20Rahman.pdf |
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