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    Tytuł:
    Czynniki mikrobiologiczne na pokładzie lekkich samolotów pasażerskich
    Microbial Agents on Board of Light Passenger Aircrafts
    Autorzy:
    Stobnicka, A.
    Górny, R.
    Gołofit-Szymczak, M.
    Cyprowski, M.
    Ławniczek-Wałczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818069.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    lekkie samoloty pasażerskie
    zanieczyszczenie powietrza
    bakterie
    grzyby
    bioaerozol
    light passenger aircrafts
    air contamination
    bacteria
    fungi
    bioaerosol
    Opis:
    Light passenger aircrafts, also known as „air taxis”, are a fast and comfortable way of transport, which becomes more and more popular nowadays. However, there is a lack of publications regarding harmful biological agents in the cabin air of light passenger aircrafts. The aim of the study was a quantitative and qualitative evaluation of microbial contamination of cabin air in eight light passenger aircrafts with open cabin type and two helicopters. The bioaerosol sampling was carried out with a stationary, volumetric method using MAS-100 NT impactor. The concentration of microorganisms was expressed as CFU/m3.The highest concentration of bacteria was detected in the helicopter Robinson R44 Raven 2 I (175 CFU/3), while the highest concentration of fungi was detected in the plane model TB9 Socata Tampico (385 CFU/m3). Kruskal-Wallis test did not show any statistically significant difference in the concentration of microorganisms in the air between the tested aircrafts, and between them and the outside background.The predominant groups of microorganisms in bioaerosols were fungi and Gram-positive cocci, which constituted 31.1-83.0% and 5.6-62.2% of the total microbiota, respectively. Sixteen species of bacteria belonging to the 8 types and 14 species of fungi belonging to 13 genera were identified in the samples.The qualitative analysis showed the presence of bacterial and fungal saprophytic strains belonging to the 1. risk group, and species belonging to the 2. risk group (Bacillus subtilis, Streptomyces spp.). Taking into account the influence of temperature and relative humidity on the concentration of bacteria and fungi in the air, it was observed that the higher temperature determined the higher concentration of bacteria, but there was no such relationship concerning fungi. Relative humidity did not significantly determine the concentration of bioaerosols.Our results indicate that the concentrations of bacteria and fungi in the cabin air were very low. However, even such an environment cannot be considered as free from pathogens. As shown by the results, the bioaerosols in the cabin air of light passenger aircrafts may contain potentially pathogenic bacteria and fungi belonging to the 2. risk group. However, bioaerosols may contain potentially pathogenic bacteria and fungi belonging to the 2. risk group. Direct contact with the afore-mentioned microorganisms, especially in the case of people with weakened immunity systems, can cause adverse health effects, as well as allergic reactions.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 492-505
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aerozole pochodzenia bakteryjnego w pomieszczeniach roboczych zakładu gospodarki odpadami
    Aerosols of Bacterial Origin in Working Rooms of Waste Management Facility
    Autorzy:
    Cyprowski, M.
    Stobnicka, A.
    Górny, R.
    Gołofit-Szymczak, M.
    Ławniczek-Wałczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818046.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    zakład gospodarki odpadami
    bakterie
    peptydoglikany
    endotoksyny
    rozkłady ziarnowe
    waste management facility
    airborne bacteria
    peptidoglycans
    endotoxins
    size distribution
    Opis:
    The aim of the research was to identify aerosols of bacterial origin, including aerobic and anaerobic bacteria, peptidoglycans and endotoxins in working rooms of waste management facility, which included sorting and composting of municipal waste. Four sampling points were located in the plant: in the pre-sorting cab, in sorting hall at conveyor belts, in the composting bunkers hall, as well as in the front of entrance gate, as a sample of external background. Air samples for the presence of bacteria were collected using a 6-stage Andersen impactor, wherein two types of microbial media were loaded: TSA agar with defibrinated sheep blood for aerobic bacteria and Schaedler's agar for anaerobic bacteria. Air samples for the presence of endotoxins and peptidoglycans were carried out using 8-stage cascade impactor, wherein the glass fiber filters were provided. Biochemical API tests were used for a detailed identification of bacteria. Determination of peptidoglycans was carried out using the SLP test (Silkworm Larvae Plasma) and endotoxin - LAL assay (Limulus Amebocyte Lysate). The results of the quantitative analysis of bioaerosols at the three tested working rooms showed the following geometric mean (GM) concentrations: aerobic bacteria – 4348 cfu/m3 (geometric standard deviation, GSD = 1.14); anaerobic bacteria – 19914 cfu/m3 (GSD = 3.65); endotoxins – 173.6 ng/m3. (GSD = 2.39); peptidoglycans – 1446.6 ng/m3 (GSD = 1.21). Comparative analysis revealed statistically significant differences (p < 0.01) between the concentrations of aerobic bacteria in the working rooms and the external background – 551 cfu/m3. Anaerobic bacteria were the dominant group and accounted for 82% of all identified microorganisms. A total of 22 species of bacteria, belonging to 13 genera was identified in waste management facility. The greatest taxonomic diversity was observed in the sorting area (21 species), composting – 15, while in the background samples – 13 species. Among the identified species, six (Actinomyces israelii, A. meyeri, A. naeslundii, Clostridium perfrin-gens, Proteus vulgaris, and Streptomyces spp. can be treated as potentially harmful to waste workers, as they were classified into the second risk group by the ordinance of Minister of Health from 2005. Analysis of size distributions of bacteria showed that they occurred mostly in the form of single cells with an aerodynamic diameter in the range of 1.1-2.1 µm, and in the range of 4.7-7.0 µm, where the process of aggregation of bacterial cells with organic dust particles takes place. In the case of endotoxins and peptidoglycans we found a gradual increase in the concentrations of particles with aerodynamic diameters in the range of 3.3-11.0 µm. On the basis of the study it can be stated that the working rooms in waste management facility were heavily contaminated with aerosols of bacterial origin. Examination provided the pioneer results for anaerobic bacteria, which were the dominant group. Bacteria that can pose a health risk to exposed workers were also found in the air. The analysis of particle size distribution suggests that the bioaerosols observed in these rooms can accumulate in the middle and upper respiratory tract of employees, causing irritation of the nose and throat.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 294-308
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zanieczyszczenia mikrobiologiczne w instalacjach klimatyzacyjnych budynków
    Microbiological contamination of building air conditioning systems
    Autorzy:
    Gołofit-Szymczak, M.
    Cyprowski, M.
    Ławniczek-Wałczyk, A.
    Stobnicka, A
    Górny, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/180059.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    szkodliwe czynniki biologiczne
    bakterie
    grzyby
    systemy klimatyzacyjne
    harmful biological agents
    bacteria
    fungi
    air conditioning systems
    Opis:
    Instalacje klimatyzacyjne są rozwiązaniem technicznym służącym poprawie jakości powierza wewnętrznego. W miarę wydłużenia się okresu eksploatacji, instalacje klimatyzacyjne mogą ulegać zanieczyszczeniu i stanowić źródło mikrobiologicznego skażenia powietrza. Zarówno w nowych budynkach jak i tych od wielu lat eksploatowanych powinno być prowadzone monitorowanie stanu instalacji klimatyzacyjnych pod kątem ich sprawności technicznej i jakości higienicznej oraz okresowe ich czyszczenie i ewentualna dezynfekcja.
    Air conditioning systems are technical solution for improvement of indoor air quality. With the passage of time, ventilation systems may be contaminated and become one of the most active emission sources of microbial contaminants. In new buildings as well as in those already exploited for many years. a detailed monitoring of air conditioning systems including periodic cleaning and prospective disinfection should be carried out as an immanent part of technical performance and hygienic purity checking.
    Źródło:
    Bezpieczeństwo Pracy : nauka i praktyka; 2014, 4; 24-26
    0137-7043
    Pojawia się w:
    Bezpieczeństwo Pracy : nauka i praktyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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