犬在中国古代发展史中的贡献

《说文稽古篇》所言：“游牧时代,惟犬独多,穴居则畜犬守御,狩猎则携犬自随,因而人必畜犬。”     

Experimental Pasteurella multocida infection of swine. A contribution to the etiology of enzootic porcine pneumonia

Pasteurella can be isolated from about 50 per cent of pneumonically changed pig lungs. Isolation, however, is possible also from intact lungs of conventional or secondary SPF animals. The authors of this paper used the positive hyaluronidase test and identified exclusively Pasteurella multocida, with predominance of capsular type A. Most of the Pasteurella strains tested in this context caused pneumonia in SPF animals, particularly, following intratracheal application. No correlations were found to exist with murine virulence, the serological type or the origin of the strains from affected or intact lungs. Apart from virulence differences between the strains, host reactivity was found to depend primarily on high germ counts and, under natural conditions, on environmental stresses. Pasteurella multocida, hence, can be considered as one of the potential pathogens of porcine pneumonia. Pneumonia foci with transduced localised fibrinous pleuritis are characteristic and constitute a process of purulent inflammation with early involvement of fibrin.     

Dictyocaulus viviparus infestation in reindeer in northern Norway. A contribution to its epidemiology.

Lungworms are not often observed in reindeer in Scandinavia. The present report shows that Dictyocaulus viviparus infestation is probably endemic in reindeer in northern Norway. Serious outbreaks occur in reindeer calves, also in combination with Pasteurella multocida infections.