Holstein-Friesian Irkı Bir Buzağıda Boynuz Köreltme Sonrası Beyin Hasarı

Öz

 Sinirsel bulgular gösteren 25 günlük bir buzağının ölüm sonrası nekropsisi yapıldı. Nekropside boynuz kaidelerinde deride yanıklar şekillenmiş olduğu gözlendi. Kafatası açıldığında sağ boynuz bölgesine denk gelen beyin dokusunda hemorajik ve nekrotik değişikliklerin şekillenmiş olduğu görüldü. Beyne atılan kesitlerde, kanama ve nekrozun beynin parenkiminde de bulunduğu dikkati çekti. Anamnezde sıcak dağlama ile boynuz köreltme işleminin yapıldığı öğrenildi. Alınan doku örneklerine mikroskobik inceleme için rutin takip prosedür-leri uygulandı. Mikroskobik incelemede beyinde yaygın nekroz ve kanama ile birlikte non-purulent meningitise rastlandı. Bazı parenkimal kan damarlarında fibrin trombüsleri dikkati çekti. Bu vakada beyin lezyonlarının koterizasyon kullanımı esnasında oluşan yüksek ısı etkisinden kaynaklanabileceği düşünülmüştür. 

Anahtar Kelimeler

• Boynuz köreltme,buzağı,beyin hasarı

Brain Damage Following Dehorning in a Holstein-Friesian Calf

Öz

 A calf was necropsied after showing clinical neurological signs and death. Skin burns were observed at the bases of horns. Necrotic and hemorrhagic changes were seen in brain tissue just beneath the right horn. Similar lesions were also noticed in the cut sections of brain parenchyma. In the anamnesis, it was told the calf was operated for the dehorning by using electrocauterization. Tissue samples were collected and processed rou-tinely for the microscopical evaluation. Necrotic and hemorrhagic lesions and non-purulent meningitis were diagnosed in the microscopical examination of brain. Fibrin thromboses were also observed in some parenchy-mal blood vessels. We considered the brain lesions in the case may originatedue to high temperature used during the cauterization process. 

Anahtar Kelimeler

• Dehorning,calf,brain damage

Kaynakça

1. Graf B. and Senn M., 1999. Behavioural and physiological responses of calves to dehorning by heat cauterization with or without local anaesthesia. Applied Animal Behaviour Science, 62, 153–171.
2. Vickers K.J., Niel L., Kiehlbauch L.M., Weary D.M., 2005. Calf response to caustic paste and hot-iron dehorning using sedation with and without local anesthetic. Journal of Dairy Science, 88, 1545-1459.
3. Kihurani D.O., Mbiuki S.M., Ngatia T.A., 1989. Healing of dehorning wounds. The British Veterinary Journal, 145, 580-585.
4. Thompson K.G., Bateman R.S., Morris P.J., 2005. Cerebral infarction and meningoencephalitis following hot-iron disbudding of goat kids. New Zealand Veterinary Journal, 53, 368-70.
5. Nation P.N. and Calder W.A., 1985. Necrosis of the brain in calves following dehorning. The Canadian Veterinary Journal, 26, 378–380.
6. Wright H.J., Adams D.S., Trigo F.J., 1983. Meningoencephalitis after hot-iron disbudding of goat kids. Veterinary Medicine/Small Animal Clinician, 78, 599–601.
7. Sanford S.E., 1989. Ontario. Meningoencephalitis caused by thermal disbudding in goat kids. The Canadian Veterinary Journal, 30, 832.
8. Dickson J., 1984. Brain damage in dehorned goat kids. The Veterinary Record, 114, 387.

9. McDannold N., Vykhodtseva N., Jolesz F.A., Hynynen K., 2004. MRI investigation of the threshold for thermally induced blood-brain barrier disruption and brain tissue damage in the rabbit brain. Magnetic Resonance in Medicine, 51, 913-23.
10. Barton J.K., Rollins A., Yazdanfar S., Pfefer T.J., Westphal V., Izatt J.A., 2001. Photothermal coagulation of blood vessels: a comparison of high-speed optical coherence tomography and numerical modelling. Physics in Medicine and Biology, 46, 1665-78.
11. El-Sabban F., Fahim M.A., 1995. Local cerebral hyperthermia induces spontaneous thrombosis and arteriolar constriction in the pia mater of the mouse. International Journal of Biometeorology, 38, 92-97.