v.8, n.1, 1
Eight of 57 water buffalo (Bubalus bubalis) died after grazing 30 days on 38-hectare pasture contaminated with Baccharis coridifolia in the north of the Province of Corrientes (northeastern Argentina). Most were found dead, others showed depression, anorexia, diarrhea, incoordination of movements and collision against fences. The conditions that caused the poisoning were overgrazing, poor pasture and lack of aversion to the consumption of Baccharis coridifolia. Gross findings included necrotic rumenitis, necrotic-hemorrhagic abomasitis, necrotic-hemorrhagic enteritis and marked brain edema. The histopathological findings were necrosis of the epithelium of the mucosa of the forestomachs, necrosis and hemorrhage in mucosa of the small intestine, necrosis of lymphocytes in lymph follicles in spleen and thymus and vasogenic brain edema. The lesions, except for brain edema, are typically reported in cattle intoxicated by Baccharis coridifolia. Vasogenic brain edema is not described in any animal species naturally experimentally intoxicated with this plant; this change may be due to direct toxic effect of Baccharis coridifolia that cause vascular injury was a secondary injury.
Key words: poisonous plants, water buffalo, necrotic rumenitis, lymphocyte necrosis, brain edema.
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v.8, n.1, 2
A 2-day-old Mangalarga Marchador colt was presented with clinical signs of severe mental depression, unable to stand, and lacking a suckling reflex. Despite intensive medical care, there was no improvement and the colt died 30 hours later. Gross lesions were characterized by aplasia of the cerebellar vermis, cystic dilatation of the fourth ventricle, communicant hydrocephalus involving all ventricles and villus hyperplasia of the choroid plexusin the fourth ventricle. The cerebral parenchyma adjacent to lateral ventricles was markedly reduced. In addition, there was aspiration pneumonia. Aplasia of the cerebellar vermis and cystic dilatation of the fourth ventricle could be compared to the Dandy-Walker-syndrome (DWS). Nevertheless, congenital cerebellar anomalies combined with villus hyperplasia of the choroid plexusin the fourth ventricle and hydrocephalus are describing for the first time in animals, alerting clinicians and pathologists for future investigations about the incidence and etiology of the condition.
Key words: colt, cerebellar vermis aplasia, choroid plexus hyperplasia, hydrocephalus.
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v.8, n.1, 3
A-2-year-old heifer showed a mass on the frontal part of the skull. Cytological analysis displayed pleomorphic, polyedric and fusiform cells with extracellular hyaline material. Histologically, the excised mass showed proliferation of spindle-to-polyhedral cells that exhibited anisocytosis and anisocaryosis. Osteoid substance was demonstrated by Masson´s thricromic stain. Tumoral cells and osteoid expressed osteocalcin. This case report communicates a very rare osteosarcoma in the corneal process of a young heifer. As the heifer was previously dehorned, it is possible that this procedure was a predisposing factor for malignant growth.
Key words: cattle, corneal process, osteosarcoma, immunohistochemistry.
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v.8, n.1, 4
The aim of this study was to report a case of infiltrative lipomatosis in the neck and colon in a horse. A 12-year-old male Spanish Pure Breed Horse with deformation of dorsal neck, weighing 650 kg, with a history of acute colic for approximately 24 hours. Euthanasia was undertaken. A necropsy revealed general excessive lipid accumulation in subcutaneous tissue in the dorsal neck. The pelvic flexure of the large colon was found to be displaced into the right cranial abdomen. A large multinodular and multifocal infiltrative fatty mass coalescing was present in a 1.5 m segment of colon with severed lipomatosis; the small intestine proximal to this lesion was moderately distended with fluid. Lipomatosis in the dorsal neck was observed, characterized by diffuse thickening of the subcutis by mature adipose tissue. In conclusion we report a case of severed infiltrative lipomatosis intestinal in large colon and neck.
Key words: horses, neck, lipomatosis, pathology.
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v.8, n.1, 5
In the present study, a case of papillary urothelial neoplasm of low malignant potential (PUNLMP) is described in a 7-year-old male terrier dog based on the WHO/ISUP consensus classification with cytologic description in urine sample. Cytological findings including the presence of cell clusters and multi nucleated umbrella cells, increased nucleus/cytoplasm (N/C) ratio, cytoplasmic homogeneity, nuclear eccentricity, nuclear molding, anisokaryosis, and anisonucleosis were compatible with low grade papillary urothelial carcinoma. Histopathologically, cells within papillae were well arranged, and minimal nuclear atypical was observed. Significant mitotic activity and pleomorphism were not found. The thickness of the epithelium varied from normal to much thicker and umbrella cells were prominent. Based on these criteria, the final diagnosis was papillary urothelial neoplasm of low malignant potential (PUNLMP). These findings are important for following research on the treatment of canine urothelial tumors and will encourage the use of such tumors as a model for human disease.
Key words: dog, papillary urothelial neoplasm, cytology, histopathology.
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v.8, n.1, 6
This paper describes the main aspects of natural infection of a street cat with Platynosomum illiciens in Cruz das Almas, Bahia, Brazil. The most significant histopathological findings included nonsuppurative cholangiohepatitis and hepatic fibrosis, which explain partially the main clinical signs displayed by the patient: cachexia, jaundice, and stupor. The gallbladder, biliary ducts and ductus choledochus were dilated, thickened, and highly infested with flukes. This report should serve to warn veterinarians about the presence of P. illiciens in the Recôncavo region of Bahia, and reinforces the importance of platynosomiasis in the differential diagnosis for feline liver diseases.
Key words: platynosomiasis, Platynosomum sp., liver fluke, feline.
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v.8, n.1, 7
A two-month-old calf was presented to the Bovine Clinic of the Universidade Federal Rural de Pernambuco, Campus Garanhuns (Brazil), with a history of lack of motor coordination in the hind limbs, progressing toward laterally inclined ambulation and imbalance since birth. The recent onset of daily seizures left the calf unable to stand. The animal exhibited pedaling movements and salivation. During the clinical exam, the calf was in lateral recumbency, with hyperextension of the fore and hind limbs, myoclonus, intention tremors (mainly of the head), opisthotonus and nystagmus. The signs were exacerbated upon stimulation. Anus and tail reflexes were diminished. The blood count findings were non-specific. The necropsy revealed a whitish, friable mass with an irregular contour affecting the surface and interior of the cerebellum and brain stem, with the left cerebellar hemisphere more affected. The lateral ventricles (mainly the left ventricle) were dilated and herniation of the cerebellum through the magnum foramen was observed. The diagnosis of medulloblastoma was performed based on the anatomical location and histopathological characteristics of the tumor.
Key words: primary neoplasm, cerebellum, bovine.
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v.8, n.1, 8
Accessory liver lobe (ALL) is an extremely rare anomaly, which can potentially undergo torsion and ischemia. A case with a herniated and twisted ALL originating from the umbilical fissure in conjunction with liver proper and lung abnormalities in a 2-day-old lamb is presented. The primitive presentation of the case was umbilical hernia that underwent herniorrhaphy and expired because of multiple anomalies. ALL seems to be caused by extra-embryonic entrapment of a portion of the liver as a result of high intra-abdominal pressure.
Key words: accessory liver lobe, liver lobe torsion, hepatic diseases, sheep diseases.
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