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Articles by Ahmet AKKOC
Total Records ( 8 ) for Ahmet AKKOC
  Ahmet AKKOC , A. Levent KOCABIYIK , M. Ozgur OZYIGIT , I. Taci CANGUL , Rahsan YILMAZ and Cuneyt OZAKIN
  Burkholderia cepacia and Aeromonas hydrophila infections are described in an African Grey Parrot (Psittacus erithacus erithacus) that presented with neurological signs, lassitude, and respiratory distress. At postmortem examination, subperiosteal ecchymotic hemorrhages in the skull, and severe subcutaneous edema in the neck and abdomen were prominent. Round, disseminated, whitish necrotic foci were noted in the congested liver. Microscopic examination revealed chromatolysis in brain neurons. Multifocal coagulation necroses were found in the liver. Non-purulent, subacute myocarditis, thromboembolic nephritis, and interstitial pneumonia were observed. Microbiological examination revealed mixed cultures of Burkholderia cepacia and Aeromonas hydrophila in brain, lung, liver, kidney, and heart samples.
  A. Levent KOCABIYIK , Esra BUYUKCANGAZ , Ahmet AKKOC , Cuneyt OZAKIN and I. Taci CANGUL
  A systemic infection with Streptococcus equi subsp. zooepidemicus is described in a 22-day-old female foal for the first time in Turkey. Clinically the foal was in poor condition and had severe pneumonia. Painful swellings of the carpal and tarsal joints were evident. Examination of the dam revealed clinical mastitis. Postmortem histopathological and microbiological examinations of samples from the foal revealed a disseminated infection with S. equi subsp. zooepidemicus. The causative agent was also recovered in pure culture from a milk sample of the mare.
  Ahmet AKKOC , Rahsan YILMAZ , I. Taci CANGUL and M. Ozgur OZYIGIT
  Fatal pulmonary aspergillosis and AA type amyloid accumulations in the liver and spleen are described in a female ostrich (Struthio camelus). The animal had had respiratory problems and long-term inappetence over an 8-week period. Necropsy revealed that several soft, grayish to white nodules ranging from 1 to 3 mm in diameter were scattered throughout the lungs and thoracic air sacs. Prominent enlargement of the liver and spleen was observed. No gross lesions were found in the other organs studied. The microscopic examination showed severe, necrotizing, granulomatous pneumonia, and air sacculitis. Aspergillus fumigatus was recovered from the lungs and air sacs as pure culture colonies. Amyloid deposition was demonstrated in the liver and spleen slides by Congo red and immunohistochemistry. To the authors’ knowledge, to date no case of amyloid accumulation in ostrich has been reported. We report, for the first time, diffuse AA amyloidosis in the liver and spleen of an ostrich, probably occurring secondary to aspergillosis.
  Ahmet AKKOC , I. Taci CANGUL and M. Ozgur OZYIGIT
  This report describes a case of multicentric intrahepatic biliary cystadenoma observed in a 13-year-old, male, Irish setter dog. The dog had a history of chronic inappetence, weight loss, intermittent icterus, and diarrhoea. In the ultrasonographic examination of the abdominal organs, 5 spherical masses were found in various liver lobes. The largest mass was 12 cm in diameter and was located on the quadrate lobe. It had spongy consistency and had several cystic structures, 3 mm-2.5 cm in diameter, on the cut surface. While this mass bulged through the normal outline of the liver, smaller masses were engraved within the liver parenchyma. Histopathologically, cystic glandular structures lined by cubical to columnar epithelial cells were observed. Immunohistochemically, tumoural cells stained positively with anti-cytokeratin 7 and anti-cytokeratin 19 antibodies. We report herein a rare case of multicentric biliary cystadenoma in an Irish setter dog with histopathological and immunohistochemical findings.
  Rahsan YILMAZ , Ahmet AKKOC and M. Ozgur OZYIGIT
  In the present study, an ileal leiomyoma encountered in a captive zebra ((Equus burchelli) was reported. A 29-year-old, female zebra was found dead in the Bursa zoo. According to the referring veterinarian the most prominent clinical signs were intermittent colic (responsive to analgesics) and constipation. At post mortem examination, abdomen was severely distended. A firm, multilobular, well vascularized and encapsulated tumoural mass, 12 cm in diameter, embedded into the proximal part of the ileum wall, and protruded from the serosal surface was found. The cut section of the mass had whorled appearance, pale yellow to white in colour, and had no sign of coagulation necroses and haemorrhages. In the microscopical examination, it was observed that tumoural mass consisted of interlacing bundles of well-differentiated, haphazardly arranged, and smooth muscle cells. Mitotic figures were not common. Immunohistochemically, neoplastic cells were stained strongly with alpha smooth muscle actin and the mass was diagnosed as leiomyoma.
  Ebru YALCIN , Nureddin CELİMLİ , İ. Taci CANGUL , Ahmet AKKOC and Zeki YILMAZ
  A 12-week-old, intact, male German shepherd dog was presented with a history of regurgitation since weaning to solid food. The dog was emaciated, and the cervical esophagus of the animal was palpable as a flaccid and air-filled cavity. Contrast radiography of esophagus revealed contrast material accumulation in the thoracic esophagus craniodorsal to the heart. A diagnosis of vascular ring anomaly was made and surgical correction of the defect was decided. The dog died during the preoperative period despite supportive treatment in intensive care unit. Necropsy findings confirmed a diagnosis of persistent right aortic arch.
  The present study describes giant-cell tumor of bone (GCToB) with lymph node involvement in a 5-year-old crossbred cat. The animal was referred to the surgery clinic with progressive subcutaneous swelling in the left proximal femoral region, severe lameness, constipation, and dysuria. A moderately firm, subcutaneous, palpable mass, 9 cm in diameter, was observed, and biopsy samples were taken. Histopathologically, the mass was constituted by ovoid-shaped mononuclear cells intermixed with many multinucleated giant cells (MGC). Immunohistochemically, the giant cells were positively stained with antivimentin, and the same cells were negative for antidesmin and anti-S100 staining. Tartrate-resistant acid phosphatase (TRAP) activity in tumor cells was evaluated and the tumor was diagnosed as malignant GCToB; the cat was euthanized. Macroscopically, while the regional lymph nodes were intact, giant cells were found in the left popliteal lymph node during microscopy. Although a few cases of GCToB have been reported in cats, the case herein displays, for the first time, evidence of lymph node involvement during the process of metastasis.
  A Maedi-Visna virus (MVV) infection was diagnosed in a 10-month-old lamb from a Turkish flock. The animal suddenly showed nervous signs and died within 2 days. At necropsy, different pulmonary and nervous lesions were observed. A Coenurus cerebralis cyst was also present in the right-brain hemisphere. Severe nonpurulent meningoencephalitis and lymphoproliferative pneumonia were detected by histopathology. MVV proviral DNA was demonstrated by polymerase chain reaction (PCR) in formalin-fixed and paraffin-embedded samples collected from the brain and the lungs. This unusual report in a young animal confirms that not only adult sheep but also lambs can develop MVV disease. The hypothesis that concurrent nervous and pulmonary diseases increase the severity of the lesions due to MVV and reduce the incubation time should be better evaluated.
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