Observations on the Ultrastructural Appearance of Endocrine Cells of the Small Intestine of the Calf     

G. R. Pearson  E. F. Logan 《Anatomia, histologia, embryologia》1983,12(1):1-6

The endocrine cells of the small intestine of neonatal calves are described, with the aid of transmission and scanning electron microscopy. It is demonstrated that endocrine cells have long microvilli, and are organized into two populations, similar to those of other species.  相似文献   

Studies on the immunity of the calf to colibacillosis. 3. The local protective activity of colostrum within the gastro-intestinal tract   总被引：2，自引：0，他引：2  

E F Logan  W J Penhale 《The Veterinary record》1971,89(24):628-632

  相似文献   

The Effect of Potato Haulm Treatment on the Incidence of Potato Gangrene in Storage   总被引：1，自引：1，他引：0  

C. Logan 《Plant pathology》1970,19(2):95-98

  相似文献   

Pathological changes in the small intestine of neonatal calves naturally infected with reo-like virus (rotavirus).     

G R Pearson  M S McNulty  E F Logan 《The Veterinary record》1978,102(21):454-458

Nine calves, of which six had been challenged with an enteropathogenic strain of Escherichia coli, were found to be naturally infected with rotavirus. Rotavirus was recovered from the faeces of six calves and rotavirus antigen was detected in the intestinal mucosa of all calves. Stunting and fusion of villi were seen principally in the proximal and middle small intestine, where rotavirus antigen was detected by immunofluorescence. Typical lesions of enteric colibacillosis were found in the distal ileum of the challenged calves, associated with adhesion of the challenge strain of E coli to the mucosa. All samples were removed from the intestine under general anaesthesia and denudation of villi was not observed. However, following exsanguination and resampling at the same site in the small intestine of one calf, denudation was a constant feature.  相似文献   

Studies on the immunity of the calf to colibacillosis. II. Preparation of an IgM-rich fraction from bovine serum and its prophylactic use in experimental colisepticaemia     

W J Penhale  E F Logan  A Stenhouse 《The Veterinary record》1971,89(24):623-628

  相似文献   

Gene expression profiling of avian macrophage activation     

Bliss TW  Dohms JE  Emara MG  Keeler CL 《Veterinary immunology and immunopathology》2005,105(3-4):289-299

  相似文献   

Saving the mind faces high hurdles     

Travis J 《Science (New York, N.Y.)》2005,309(5735):731

  相似文献   

Respiratory syncytial virus pneumonia in young calves: clinical and pathologic findings   总被引：3，自引：0，他引：3  

D G Bryson  M S McNulty  E F Logan  P F Cush 《American journal of veterinary research》1983,44(9):1648-1655

Nine young calves given respiratory syncytial virus by a combined intranasal and intratracheal route developed a severe respiratory tract disease in which coughing, tachypnea, and hyperpnea were prominent clinical features. Calves were euthanatized on postinoculation (initial) days (PID) 1 to 13. At necropsy, large areas of consolidation were present in the cranial, middle, accessory, and cranial parts of the caudal lung lobes of calves killed between PID 4 and 13. Histopathologic examination revealed widespread and severe lesions in small bronchi, bronchioli, and alveoli. Multinucleate epithelial syncytia on bronchiolar and alveolar walls, many containing eosinophilic intracytoplasmic inclusion bodies, were present in the lungs of calves killed on PID 4, 5, and 6. Necrosis and epithelial loss, hyperplasia, and metaplasia were also observed in the epithelium of small bronchi and bronchioli. The lumina of these airways were occluded to varying degrees with exudate. Exudate was present within alveoli, and interalveolar septa were markedly thickened. Collapse of the thickened septa produced large areas where alveolar air spaces were totally obliterated. Repair was evident in the lungs of calves killed at PID 10 and 13 with reepithelialization of damaged bronchiolar mucosa, organization of bronchiolar exudate leading to bronchiolitis obliterans, and peribronchial and peribronchiolar fibrosis. Inoculation of 3 calves by an intranasal route alone produced a less severe clinical disease with only minimal lesions present at necropsy.  相似文献   

Coronavirus infection of the bovine respiratory tract   总被引：5，自引：0，他引：5  

M S McNulty  D G Bryson  G M Allan  E F Logan 《Veterinary microbiology》1984,9(5):425-434

Two viruses, morphologically resembling coronaviruses and antigenically indistinguishable from bovine enteric coronavirus, were isolated in bovine tracheal organ cultures from the lungs and trachea of young calves with respiratory disease. Intranasal and intratracheal inoculation of these viruses into neonatal calves resulted in a predominantly upper respiratory tract infection, which was associated with the development of mild respiratory symptoms.  相似文献   

What is your diagnosis? Incidental melanosis of a salivary gland lesion     

Pownder S  Fidel JL  Saveraid TC  Gailbreath KL  Gavin PR 《Journal of the American Veterinary Medical Association》2006,229(2):209-210

  相似文献