Studies on Congenital Abnormalities of Head, Neck, Thorax and Forelimb of Cattle in Karnataka

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dc.contributor.advisorJamuna, K.V.
dc.contributor.advisorPrasad, R.V.
dc.contributor.advisorNagaraja, C.S.
dc.contributor.advisorChandrashekar Murthy, V.
dc.contributor.advisorByre Gowda, S.M.
dc.contributor.authorSathish Kumar, B. M.
dc.date.accessioned2016-10-28T14:57:00Z
dc.date.available2016-10-28T14:57:00Z
dc.date.issued2014-09-26
dc.descriptionPG Thesisen_US
dc.description.abstractTwo cases of schistosomus reflexus (SR), two cases of hydrocephalus and single case of cyclopia, dicephalus and a polydactylism were studied under four categories namely head, neck, thorax and forelimb in cattle. Both SR calves, showed a cleft sternum, exposure of thoracic contents and hypoplasia of lungs and diaphragm. In one calf brachiocephalic trunk originated from left ventricle and common aorticopulmonary trunk from right ventricle, a shunt connecting brachiocephalic trunk with aorta and ventricular septal defect was noticed. Complete absence of left forelimb, and anomalous origin of left subclavian artery from the aortic arch were noticed in the second calf with SR. Two cases of hydrocephalus studied, showed enlarged cranial cavities with dome shaped skull and thinning of cranial bones like frontal, parietal and temporal, enlarged lateral ventricles with thinning of brain parenchyma around it. Cyclopic calf was characterized by single centrally placed orbit containing fused eyeballs, rudimentary eyelids and absence of skeletal structures of nose resulting in lower jaw longer than upper one. Trachea and esophagus sharing a common lumen was a very rare finding, observed in an altodymus dicephalic calf. An additional digit on the medial aspect of both forelimbs noticed in the bull with polydactylism. SR and hydrocephalus might have resulted because of autosomal recessive mode of inheritance, cyclopic condition could be because of interruption in the Shh (Sonic hedgehog) mediated patterning of ventral neural tube. “Y” shaped notochord formation during the process of development may be the probable reason for the dicephalic condition. Polydactylism might be due to the presence of an extra amount of progenitor tissue or due to an abnormal apoptosis of tissue during the development of digits. Studying the congenital abnormalities is the basic step to elucidate the possible cause, apart from adding some valuable information to the field of embryology, it also helps in understanding the normal process of development.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/82806
dc.language.isoenen_US
dc.publisherKarnataka Veterinary, Animal and Fisheries Sciences University, Bidaren_US
dc.subVeterinary Anatomy and Histologyen_US
dc.subjectSR, hydrocephalus, cyclopia, altodymus, dicephalic, polydactylism, autosomal recessive, calf, bull.en_US
dc.titleStudies on Congenital Abnormalities of Head, Neck, Thorax and Forelimb of Cattle in Karnatakaen_US
dc.typeThesisen_US
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