Ultrastructural changes in some pathogenic bacteria after treatment with ethylendiamintetraacetic acid.

The ultrastructure of Pseudomonas pseudomallei, Pseudomonas aeruginosa. Yersinia pseudotuberculosis, Salmonella typhimurium, Listeria monocytogenes was studied after treatment with EDTA. The study established that the most sensitive species were: Pseudomonas pseudomallei and Pseudomonas aeruginosa.

Influence of D,L-ureidosuccinic acid dihydrazide on some biological properties of Pseudomonas pseudomallei and of Salmonella typhimurium.

The changes induced in strains of Pseudomonas pseudomallei and Salmonella typhimurium under the action of D.L-ureidosuccinic acid dihydrazide were characterized. A decrease of the speed of multiplication in vitro and of the oxygen consumption was established.

On the metabolic characteristics of hybrids Shigella flexneri x Escherichia coli, devoid of their ability for intracellular multiplication in the epithelial cells. IV. Growth characteristics in the presence of some tricarboxylic acid cycle intermediates.

The dynamics of avirulent xyl-str and xyl + hybrids Sh. flexneri was investigated in minimal medium in the presence of some tricarboxylic acid cycle intermediates (succinate, malate, fumarate) and pyruvate. It was established that the hybrids with a replaced xyl-str or xyl-region show a considerably lower rate of multiplication in artificial media than the virulent recipient strains.

On the metabolic characteristics of Shigella flexneri X Escherichia coli, devoid of ability for intracellular multiplication in epithelial cells. III. Oxygen uptake and dehydrogenase activity.

The oxygen uptake and dehydrogenase activity of avirulent xyl+ and xyl- str hybrids (KCP-), obtained from virulent strains Sh. flexneri (Sh. flexneri 222 5 a and Sh.