Mandibular Osteoma in a Haflinger Mare: Clinical and Pathological Features.

A 11-year-old, Haflinger breed mare developed a slowly growing mass, protruding on the ventral aspect of the mandible. On palpation, the lesion was pedunculated, very firm, cold and not painful. Radiographic examinations showed a radiopaque, multi-lobular, "mushroom-like" lesion, which arose from the mandibular cortex without involving the bone marrow cavity. Thereafter, the mass was excised for cosmetic purposes. Microscopically, the lesion mainly consisted of bone trabeculae, covered by a thick layer of connective tissue resembling the periosteum. History and clinical findings allowed the temptative diagnosis of mandibular osteoma, which was further supported by diagnostic imaging and pathological features. In particular, the presence of pedunculated lesions arising from the bone surface appeared as highly suggestive of osteoma. Equine osteomas usually affect paranasal sinuses and the rostral mandible and share many similarities with other neoplastic and neoplastic-like conditions, such as ossifying fibroma and fibrous dysplasia. The prognosis is good whenever the neoplasm is fully removed, that depending on the localization and the size of the mass.

African Swine Fever Outbreak at a Farm in Central Namibia.

An outbreak of African swine fever (ASF) occurred at a farm in central Namibia in March 2018. Fourteen pigs died out of a herd of 59 animals over a period of 16 days between the first and sixteenth of March 2018. The clinical signs observed included sternal recumbency, fever, weakness, pain and reluctance to move, hyperemia of the skin and anorexia, followed by death. Necropsy findings included large amounts of unclotted blood in the pleural and peritoneal cavities, diffuse carcass congestion, splenomegaly, consolidation of both lungs, hemorrhagic and frothy airways and trachea, hepatomegaly and congestion, congestion of the gastric mucosa, enlarged and congested kidneys, ecchymotic epicardial, and endocardial hemorrhages, and very enlarged and congested urinary bladder. All the remaining pigs were euthanized, burned, and buried under state veterinary supervision. The authors concluded that the outbreak resulted from indirect transmission of the ASF virus due to lapses in biosecurity measures.