Chronic partial obstructive urolithiasis causing hydronephrosis and chronic renal failure in a steer.

A 13-month-old Angus steer was examined with a 6-week history of lethargy, malaise and dribbling urine. Laboratory exam revealed crystalluria and poor renal function. Ultrasound revealed hydronephrosis and hydroureter. Euthanasia was chosen because of a poor prognosis for economic recovery. Necropsy demonstrated numerous calculi causing partial urethral obstruction approximately 25 cm from the end of the penis. Secondary renal changes were confirmed. Urolithiasis occurs commonly in ruminants. Secondary obstruction is usually complete with severe consequences. This is the first report of chronic partial obstructive urolithiasis resulting in endstage renal disease.     

Radiological assessment of 50 cases of incisive or maxillary neoplasia in the dog

This paper reviews the radiological features of 50 canine incisive or maxillary tumours and discusses the value of radiological assessment in the diagnosis and staging of these tumours. The 50 tumours examined included 21 sarcomas, 15 carcinomas, three melanomas and an assortment of benign tumours of the oral cavity. There was not any site specificity for the different histological tumour types within the upper dental arcade, although fibrosarcomas had a tendency to be maxillary whereas the squamous cell carcinomas were equally distributed between the incisive and maxillary regions. Seventy-eight per cent of fibrosarcomas, 82 per cent of squamous cell carcinoma and all three melanomas examined showed radiological evidence of bone involvement. Radiographic changes were also seen in the benign tumours. The pattern of growth of tumours correlated with the radiological changes observed. Malignant tumours showed a tendency to irregular or aggressive bone loss whereas bone production predominated in the benign tumours.     

Seroprevalence of porcine and human influenza A virus antibodies in pigs between 1986 and 1988 in Hassia

1,268 sera collected from slaughtered pigs in Hassia (FRG) from 1986 to 1988 were tested for antibodies against porcine and human influenza A virus strains using the single radial haemolysis test (SRHT). Antibodies against the porcine strains (subtype H1N1) A/Swine/Arnsberg/1/81, A/Swine/Iowa/15/30 and A/New Jersey/7/76 were detected in 411 (32.4%), 318 (25.1%) and 304 (24.0%) of sera, respectively. Up to 1988 a slight increase (10%) in the seroprevalence to A/Swine/Arnsberg/1/81 was noticed, whereas the results obtained with the other strains showed little variation. Antibodies against the human H1N1 strain A/Singapore/6/86 were only found in sera collected 1987 and 1988 in rates of 1.6% and 3.0%. Serological indication of infections with the human H3N2 strains A/Victoria/1/75, A/Hong Kong/1/68 and A/Philippines/2/82 could be shown in 286 (22.6%), 178 (14.4%) and 135 (10.6%) of the serum samples. Within the three year period the rate of sera positive for antibodies against A/Philippines/2/82 increased from 6.5% to 23.0%, whereas no variation in the rates were found using the other H3N2 strains. Antibodies simultaneously against porcine (H1N1) and human (H3N2) virus strains were detected in 9.9% of all sera tested.     

An unusual tumor of the nictitating membrane gland of dogs-- a case report]

A tumor of the third eyelid gland was diagnosed in a 13 year old female Chihuahua. Histopathology of the excised tissue revealed an apocrine adnexoma with squamous metaplasia. The literature regarding prolapse and tumors of the third eyelid gland was reviewed. No case with similar morphology to this tumor was described to our knowledge.     

Effect of xylazine on cerebrospinal fluid pressure in conscious horses.

Lumbosacral CSF pressure was measured in 6 horses via a catheter inserted through the lumbosacral space. Heart rate, facial artery pressure, central venous pressure, and CSF pressure were measured before IV injection of a saline solution control, for 15 minutes after saline solution injection, and for 60 minutes after the IV injection of 1.1 mg of xylazine/kg of body weight. Arterial pH and blood gases were analyzed before saline solution injection, 15 minutes after saline solution injection, and at 15, 30, and 60 minutes after xylazine injection. Constant craniocervical posture was maintained during sedation. Lumbosacral CSF pressure was significantly decreased for 15 minutes after xylazine injection. Diastolic arterial pressure was significantly increased 4 minutes after xylazine administration and diastolic and mean arterial pressure were increased at 6 and 8 minutes after xylazine administration. Small increases in systolic arterial blood pressure and central venous pressure, and a small decrease in heart rate were observed. There were no significant differences in the arterial blood gas values. It was concluded that IV injection of xylazine causes a decrease in intracranial pressure in healthy conscious horses. The effects may be different in horses with neurologic disease or cerebral trauma.     

Plant interference and chemical toxins in upland pastures

Supernatants derived from desiccated plant material gathered from Agrostis/Festuca vegetation had an inhibitory effect on the germination and early development of seedlings of Trifolium repens cv. S184. Two compounds, o -hydroxyphenylpropionic acid and benzoic acid, were identified chromatographically and their structures confirmed by mass spectrometry. Commercial preparations of the two compounds were effective inhibitors at a concentration of 10⁻² and 10⁻³ m respectively when T. repens was used as the phytometer species. Benzoic acid lost its inhibitory effect when the pH of the two solutions was adjusted to pH 5·5. The roots of seedlings of white clover were severely distorted by o -hydroxyphenylpropionic add at 10⁻³ m . It is likely that phenolic acids, produced from the surface trash created by slot seeding procedures, interfere with the establishment of white clover in upland pastures.     

Progressive Dermal Collagenosis of Male Miniature Swine

Abstract— A unique dermatosis of male miniature swine is described. The disease occurs in post-pubertal pigs, and is characterized by symmetrical, indurated, plaques over the truncal region. Histologically, the dermis and panniculus are effaced by thick, interwoven bundles of collagen resulting in an absence of deep dermal elastin. Hypertrophy and hyperplasia of superficial dermal vessels, fibroblasts and fibrocytes are accompanied by perivascular infiltrates of lymphocytes, plasma cells and eosinophils. The pathogenesis of this unusual dermatosis, designated as “progressive dermal collagenosis of male miniature swine” is unknown. Résumé— Une dermatose originale du cochon nain mâle est décrite. La maladie apparait chez des cochons post pubertaires, et est caractérisée par des plaques sur le tronc, indurées et symétriques. Histologliquement, le derme et le pannicule sont envahis par d‘épais falsceaux de collagène, entrainant l'absence d’élastine dermique. Les vaisseaux du derme superficiei sont hyperplasiés et hypertrophiés, des fibroblastes et des fibrocytes sont accompagnés d'un infiltrat inflammatoire périvasculaire de lymphocytes, éosinophiles et plasmocytes. La pathogénie de cette affection peu commune, appelée “collagénose dermique progressive du cochon nain mâle” est inconnue. Zusammenfassung— Es wird eine einzigartige Hauterkrankung beim männlichen Miniaturschwein beschrieben. Die Krankheit tritt bei postpubertären Schweinen auf und wird durch symmetrische, indurierte Plagues im Rumpfbereich gekennzeichnet. Histologisch treten Dermis und Pannikulus gegenüber dicken, verflochtenen Kollagenbündeln in den Hintergrund, wodurch das tiefe, dermale Elastin verschwindet. Die Hypertrophie und Hyperplasie der oberflächlichen Hautgefäße, Fibroblasten und Fibrozyten wird von perivaskulären Infiltraten aus Lymphozyten, Plasmazellen und eosinophilen Granulozyten begleitet. Die Pathogenese dieser ungewöhnlichen Dermatose, die als “progressive dermale Kollagenose des männlichen Miniaturschweins” bezeichnet wird, ist unbekannt. Resumen El presente artículo es una descripción de una dermatosis única del macho cerdo miniatura. Le enfermedad aparece después de la pubertad, y se caracteriza por la aparición de placas simétricas sobre la región del tronco. El exámen histológico de la dermis y del tejido panicular revela la presencia de gruesas bandas de colágeno entrelazadas, lo cual tiene como resultado la ausencia de la capa de elastina profunda. La hipertrofia e hiperplasia de los vasos superficiales dérmicos, fibroblastos y fibrocitos, se ve acompañadas de infiltrados perivasculares de linfocitos, células plasmáticas y eosinófilos. La patogénesis de esta rara dermatosis Ilamada ‘colagenosis dérmica progresiva del cardo macho miniatura’, es desconocida.     

Distribution of ASFV antigens in pig tissues experimentally infected with two different Spanish virus isolates.

Lymph nodes, spleen, liver, lung and kidney obtained from pigs experimentally infected with two African Swine Fever Virus (ASFV) isolates of differing virulence were fixed by perfusion with glutaraldehyde and embedded in paraffin. An immunoperoxidase technique using a polyclonal anti-ASFV serum was performed on tissue sections in order to detect ASFV antigen. The distribution of ASFV antigen in such infected organs is shown and the differences between both infections compared and discussed. Monocytes, macrophages, hepatocytes, endothelial cells, neutrophils and epithelial cells were found to contain ASFV antigens.     

马鹿假台鹿采精技术的研究

对６头试验公鹿用假台鹿采精，采精前对特制的假阴道以药用凡士林为滑润剂，注水充气，温度为４０℃±１℃，以适宜的压力和滑润度，将其安装在人工制做的假台鹿内。拨赶公鹿于采精场诱其爬跨。结果，试验的６头公鹿中有４头能够采精，共２２头次，射精量平均每头次１．５４ｍｌ，精子密度为１８．６—３７亿／ｍｌ，精子活力在０．８以上。９３年每头次生产细管冻精１０６．２５支（４２５支／４头次），是同年电刺激采精法平均６４．４支／头次（９０２支／１４头次）的１．６５倍，此法既能采到质量高的精液，又比电采法省工、省时、省力、安全，是一种理想的马鹿采精方法。