At present multiple sclerosis (MS) 1 presents a very complex medical problem. There are three fundamental reasons for this: first, the diagnosis of MS is extremely difficult (1) ; secondly, the etiology of the disease is unknown (2) ; and finally, a problem that is the keystone to the analysis of the other problems is the lack of a system, other than man, in which the disease can be studied. In...

horizontal transmission of an isolate of the etomopathogenic fungus, beauveria bassiana kcf102, was examined by allowing inoculated eurygaster integriceps put. adults to mate with non-inoculated ones. in case of susceptibility to b. bassiana, there was no significant difference between the males and females. however, there was significant difference among treatments for mortality of non-inocula...

Gnotobiotic piglets inoculated with Escherichia coli O157:H7, its luxS mutant derivative, or nonpathogenic E. coli were evaluated for attaching and effacing lesions. Although no differences in clinical symptoms were seen between pigs inoculated with the parent and those inoculated with the luxS mutant, the luxS mutant-inoculated pigs had a lower frequency of attaching and effacing lesions in th...