Aim. Determination of the actual spectrum of pathogenic microorganisms to which medical workers of mobile teams of emergency medical care (EMC) are exposed, and scientific justification of the class of the working conditions of this professional group in terms of the biological factor. Materials and Methods. Data of the electronic journal of the automated Ambulance Service control system for infectious patients, and records of the register for infectious diseases among workers of the municipal emergency medical care station of Ryazan (300 medical assistants, 64 doctors) for 2016-2019 were used. Results. The average amount of calls to patients with infectious pathology in 2016-2019 made 2178.5221.3 per year. Most emergency calls were for intestinal infections, common cases were varicella, erysipelas, viral hepatites, tuberculosis infection, herpes zoster. The main load in servicing these calls fell on linear (from 63.7 to 77.4%) and pediatric (from 24.8 to 35.1%) teams; calls of resuscitation teams to patients of such profile were sporadic. The level of infectious morbidity of doctors made 0.78 cases per 100 doctors which is 1.2-fold higher than the level of medical assistants (t=3.79; р=0.0003). Conclusion. The confirmed cases of diseases of the studied group of workers resulting from professional contacts with sources of infections of Group III pathogenicity permits to refer the working conditions of medical workers of mobile teams of emergency medical care stations to hazard Class II. However, a high probability for professional contact with high pathogenicity strains of group A influenza, HIV-1 and HIV-2, hepatitis C, D, E viruses belonging to Group II pathogenicity, and existence of the evident contacts with SARS-CoV-2, permit to raise the class of the working conditions to hazard Class III.
When characterizing vehicle emissions, as a rule, the speed of traffic flows is not taken into account, which significantly reduces its accuracy. In this regard, the use of the cartographic method for assessing the speed of traffic flows on the tracks is quite reasonable and relevant. The assessment of the intra-annual dynamics of the intensity of traffic flows and emissions of the main components of exhaust gases by vehicles on the streets of the city of Ryazan and bypass roads using a cartographic method for recording the intensity of traffic flows was carried out. The study was conducted in 2018–2019 on the territory of Ryazan. The material used for the study was cartographic data published in free access on the website www.yandex.ru traffic jams. The length of traffic flows with a speed of 5-10 km / h (heavy traffic conditions – TTU) was determined at different times of the day on days of the week. The indicators of the average hourly length of heavy transport conditions were calculated. Bypass roads of the city were characterized by a significantly greater length of sections with TTU compared to the city streets from Tuesday to Thursday and Sunday (p<0.05). The increased complication of traffic conditions during morning and evening rush hours led to an average annual increase in emissions of the main components of vehicle exhaust gases of 17.7% and 14.9% respectively, with the largest increase in emissions being typical for the city center. At the same time, the maximum complication of transport conditions on the bypass roads was observed in the summer and spring (from Monday to Wednesday and Sunday), while on city highways - on working days in the autumn and weekends in winter. On the city streets, the greatest length of heavy traffic conditions during the morning rush hour was observed in winter, and the shortest was in summer, while the evening rush hour, on the contrary, was most pronounced in autumn. On the bypass roads, there was a clear tendency towards heavier transport conditions over a longer period of the day according to the scheme winter–autumn–spring– summer.
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