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.     

Antibody responses to avian encephalomyelitis virus vaccines when administered by different routes

Antibody responses to a commercial avian encephalomyelitis virus (AEV) vaccine administered by different routes were measured by an enzyme-linked immunosorbent assay (ELISA). Responses to single doses of vaccine administered by the ocular route to 10% of a flock were comparable with those obtained when all birds received a single dose in the drinking water. However, ocular vaccination of 5% of the flock resulted in significantly lower responses than those obtained when 10% were vaccinated. Maternal antibody was shown by the ELISA to persist in chickens from vaccinated flocks for up to 21 days after hatching. Day-old chickens with serum absorbances of < 0.3 at 492 nm, as determined by the ELISA, were shown to be susceptible to intracerebral challenge with the neurotropic Van Roekel strain of AEV.     

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。     

Das Rete mirabile der Arteria maxillaris des Löwen (Panthera leo, L. 1758)

Seventeen lion heads were examined. Their arteries were injected with colored supervinyl-chloride (dissolved in acetone) after which the heads were macerated biologically. The rete mirabile of the maxillary artery was located extracranially and was formed by numerous arteries that arose from the dorsal and medial surfaces of the maxillary artery. The rete released branches (rami retis) which entered the cranial cavity through the orbital fissure where they anastomosed with the intracranial segment of the internal carotid artery. The extracranial portion of the internal carotid was found to be obliterated. Some other arteries leaving the rete anastomosed with the internal ophthalmic artery before it entered the optic canal. The following further arteries left the rete: A. ethmoidalis externa, A. ophthalmica externa, rami musculares and ramus pterygoideus. The rete mirabile of the maxillary artery in the lion provides the principal source of the blood for the brain; it also supplies the orbit.     

Pathology of infectious diarrhea of infant rats (IDIR) induced by an antigenically distinct rotavirus

Suckling rats were inoculated with a group B rotavirus to determine the progression of the morphologic changes induced in the intestine by this virus. Several changes were observed by light microscopy 1 day after viral inoculation: shortening of small intestinal villi, villous epithelial necrosis, and villous epithelial syncytia. The lesions were most often present in the distal small intestine, although other small intestinal segments were affected to a lesser degree. By day 3 post-inoculation, epithelial necrosis, and syncytia were no longer present; however, the villous epithelium was disorganized and irregularly vacuolated, and intestinal crypt epithelium was hyperplastic. Alterations in villous height to crypt depth ratios were present in portions of the small intestine for the remainder of the 12-day study period. Epithelial syncytia appeared to form by the breakdown of the lateral interdigitating membranes of the absorptive villous epithelium. Viral particles, abundant in the syncytia, appeared to form from amorphous or reticular arrays of viral precursor material. Group B rotaviral antigens, as detected by indirect immunofluorescence, were present in large amounts in the small intestinal villous epithelium only on the first day after viral inoculation. These studies show that two important diagnostic features of group B rotaviral infections of rats, epithelial syncytia and viral antigen as determined by immunofluorescence, are present only on the first day of disease. These findings should be taken into consideration when attempting to diagnose disease induced by this agent.