[Epidemic security of the population of Tyrnyauz in Kabardin-Balkar Republic under the conditions of emergency situation caused by flood].

Materials characterizing the consequences of emergency situation caused by natural type in Tyrnyauz, the Kabardin-Balkar Republic, are presented. As shown in these materials, mud flows from the surrounding mountains resulted in the damage inflicted to the main life-supporting systems of the town: water supply and sewage, power supply, medical institutions and, partially, housing resources. As the result of urgent measures carried out in cooperation with the departments of the Ministry of Emergency Situations, health services and state sanitary and epidemiological surveillance services epidemiological safety could be ensured in the town.

[Testing and isolation of high-purity restriction endonucleases].

A new method of testing restriction nucleases is proposed. This method is based on high-temperature treatment of crude cell extracts. Disrupted cells were heated at 50-60 degrees C, centrifuged, and assayed for restrictases.

[Study of antibiotic sensitivity of microorganisms by the method of diffusion in agar layers].

The proposed method for assessing microorganism sensitivity in solid and semisolid liquid nutrient media provides more accurate results and permits isolation of resistant forms of bacteria and studies of antibiotic interactions. Bacteriological study of latent growth zones of bacteria, although rather long, makes the results more reliable. The method can be used for assessing the microflora sensitivity in patients without resorting to isolation of pure cultures and in biotechnology for isolation of new antibiotics.