An atypical case of lymphosarcoma (sporadic bovine leukosis) in a heifer.

An 18-month-old Friesian heifer had several unusual, raised, black, cutaneous plaques, some of which were up to 20 cm in diameter, on its head and neck, limbs, thorax and perineum. There was also generalised lymphadenopathy. A clinical diagnosis of lymphosarcoma (sporadic bovine leukosis) was derived from a fine needle aspiration of a skin lesion. Post mortem and histological examinations confirmed a multicentric lymphosarcoma with widespread infiltration into many of the tissues recognised as predilection sites for this type of tumour. However, in the authors' experience, the presence of tumour masses in the trachea and the right mainstem bronchus was atypical.     

Sero-epidemiological and pathological studies on enzootic bovine leukosis in Turkey.

The prevalence of enzootic bovine leukosis (EBL) in Turkey was investigated by serological screenings using the agargel immunodiffusion test (AGID). A total of 4,047 blood samples obtained from 2,780 cattle between one and 14 years of age and taken in 6-8 month-intervals in three dairy farms were tested for the presence of EBL-specific antibodies. A high prevalence of EBL-sero-positive animals was found amongst cattle in two of the farms. Furthermore, recommendations based upon the regulation implemented by an expert group of the European Commission and considering the local dairy management conditions were presented.     

Pathological studies on systemic mycoses in calves.

Systemic mycoses were found in 19 (4.7%) of 406 calves less than 6 months old which were autopsied during the past 10 years. Alimentary mycosis occurred in 12 (63.2%) of 19 cases. In alimentary mycosis, mucormycosis showed the highest rate of occurrence (91.7%, 11/12 calves) followed by aspergillosis 41.7% and candidiasis was 9.3%. Mucormycosis and aspergillosis were characterized by focal hemorrhagic necroses with hyphal proliferation and thrombi in the mucosa and muscular layers of the forestomach, abomasum, and small intestine. Candidiasis was characterized by hyperkeratosis with pseudohyphae and microconidia in the mucosa of the omasum. Four of 12 calves (33.3%) had mixed infections of the alimentary tract consisting of Mucorales and Aspergillus species. Pulmonary aspergillosis was found in 10 (52.6%) of 19 calves. There were micro-abscesses with hyphal proliferation or asteroid bodies in the lungs. Infections involving both the alimentary tract and respiratory organs were noted in 3 (10.5%) of 19 calves. Disseminated mycosis was found only in one calf. In alimentary mycosis, administration of antibiotics for the treatment of diarrhea and early weaning were thought to be an important predisposing factor.     

人工感染猪支原体肺炎的病理学观察

用猪肺炎支原体人工感染仔猪。发病猪临床表现轻度咳嗽和气喘。尸体剖解可见肺呈心叶、尖叶、中间叶和膈叶边缘胰样变,支气管淋巴结肿胀,切面湿润;右心室肥大、心包积液;肾脏稍肿大,色褐黄;肝脏轻度肿大,色泽较黄。病理组织学变化为细支气管周围有淋巴细胞增生,形成"管套"或结节,肺泡壁上皮细胞变性、坏死;肝细胞、肾小管上皮细胞颗粒变性。     

商品代肉鸡J亚群禽白血病的病理及病毒分离鉴定

通过对山东某肉鸡养殖场发病的商品肉鸡组织病理学检查和将病料接种鸡胚成纤维细胞 (CEF) ,我们在国内首次从商品代肉鸡中分离到了 J亚群禽白血病病毒 (AL V- J)。从组织切片中可以看到肝脏、脾脏等器官的髓细胞瘤细胞 ,呈散在或成簇 ,髓细胞瘤细胞的细胞质内显现嗜酸性颗粒。用抗 AL V- J囊膜糖蛋白的单克隆抗体进行的 IFA中 ,病料接种 CEF后进行的 IFA呈现强阳性