[Drug resistance of opportunistic enterobacteria isolated from various sources].

Resistance of 159 strains of opportunistic enterobacteria to 9 antibacterial drugs was studied. The strains were isolated from man and cattle. It was shown that the overwhelming majority of the isolates (93 per cent) were polyresistant irrespective of the genus.

[Variability of the pathogenicity traits of populations of staphylococci in a surgical hospital].

The results of the study of heterogeneity of staphylococcal populations at a surgical ward are presented. The study deals with qualitative and quantitative characteristics of three groups of pathogenicity factors: protease (the penetration factor), protein A (the function of protection from phagocytosis) and alpha-hemolysin (the toxic function). The study shows that the greatest number of S.