Degradation of heat-treated cells of Proteus vulgaris P 18 with a protease preparation from a soil Bacillus subtilis allowed the isolation of a cell envelope structural entity, 60-70 Å thick, consisting of two electron-dense layers separated by a light one and composed, at least in part, of lipopolysaccharide O-antigen and of peptidoglycan. An enri...
The wall peptidoglycans in Gaffkya homari ATCC 10400 and in Aerococcus viridans 201 Evans and ATCC 11563 are made up of peptide units L-alanyl-γ-D-glutamyl-L-lysyl-D-alanine and L-alanyl-D-isoglutaminyl-L-lysyl-D-alanine. The yields of the peptide fragments obtained after enzymatic degradations of the walls are consistent with a peptidoglycan struc...
Antagonistic effect of piglet microflora against Clostridium perfringens was studied in germfree mice, to isolate bacterial strains responsible for this colonization resistance. The 1:100 dilution of the feces of a 2 day-old conventional piglet, given per os to germfree mice already harboring C. perfringens, led to the elimination of C. perfringens...
Published in Proceedings of the National Academy of Sciences of the United States of America
A method for determining tissue sites of plasma protein degradation is described as applied to studies of low density lipoprotein (LDL) catabolism in swine. The method is based on the fact that sucrose is not degraded by lysosomal enzymes and thus accumulates in lysosomes. [(14)C]Sucrose was activated with cyanuric chloride and covalently coupled t...
The authors described the apparition of the infection in the swine in French and particulary in Britain, the clinical aspects: septicemiae with nervous symptoms or sudden death. During one year and half (1982-1983) on 273 strains of streptococcus isolated from ill swines 50 % approximatively of the strains are streptococci R (suis II). They emphasi...
