Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 9

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
RU
В 1980—1984 гг. исследовали ежегодно 92 371— 101 763 лиц, пяофессионально подвергающихся ин­фекции палочками Brucella. Число зарегистрированных случаев бруцеллеза составило 831 Соот­ветственно ежегодно регистрировали: 222, 155, 158, 149, 147. По сравнению с предыдущей 5-леткой число заболеваний уменьшилось на 308 случаев. Наиболее экспонированными на инфекцию были лица, работабщие на следующих постах: ветери­нарный врач-техник-санитар, скотник, дояр, мяс­ник колбасник, убойный.
EN
In 1980—1984 from 92 371 to 101 763 persons pro­fessionally exposed to Brucella infection were exami­ned yearly. The total number of registrated cases of brucellosis was 831 and 222, 155, 158, 149 and 147 cases were diagnosed in each year. Comparing to a previous five years examination the number of cases decreased by 308. Veterinarians, veterinary techni­cians and veterinary nursers, cow barn workers, milk­men, butchers, massage and slaughter service are exposed most often to Brucella infection.
EN
Microbiological air sampling with the use of personal sampler was performed in 14 small agricultural facilities located in Aurangabad (Southern India), including 5 farms (at harvesting and threshing), 6 godowns (small food storing and processing settings) and 3 grain or cotton mills. In 12 facilities, including harvesting on farms, godowns and mills, concentrations of airborne microorganisms were relatively low, ranging from 1.5 x 103 - 8.2 x 104 cfu/m3. The striking rise in the concentrations of airborne microbes, by 2-4 orders of magnitude, was noted on 2 farms during threshing of maize (4.2 x 106 cfu/m3) and pearl millet (1.1 x 107 cfu/m3). This was due to release of large quantities of bacteria. During threshing of maize, the most common microorganisms were thermophilic actinomycetes (40% of the total count) and mesophilic actinomycetes of the genus Streptomyces (39%), while during threshing of pearl millet the most abundant were corynebacteria (68%) and Gram-negative bacteria (22%). Mesophilic bacteria formed 16.7-100% of the total airborne microflora and were prevalent in 11 out of 14 facilities. Thermophilic actinomycetes and fungi formed respectively 0-43.1% and 0-83.3% of the total count and were prevalent in 1 and 2 facilities. The concentrations of airborne dust and endotoxin recorded in the examined agricultural facilities, in most cases were very large and ranged from 2.5-257.5 mg/m3, and from 0.0625-125.0 µg/m3, respectively. In 10 out of 14 facilities, the concentrations of dust were of the order 101-102 mg/m3, ranging from 25.0-257.5 mg/m3. Similarly, in 7 out of 14 facilities the concentrations of endotoxin were of the order 101-102 µg/m3, ranging from 31.25-125.0 µg/m3. In conclusion, Indian agricultural workers could be exposed during handling of various plant materials to airborne biological hazards posing a risk of work-related respiratory disease. Of these, the most important are: bacterial endotoxin and allergenic species of bacteria and fungi. The greatest risk occurs at threshing of pearl millet and maize which requests an application of the appropriate prevention measures, such as wearing respirators by the workers and using modern threshing machines reducing the dustiness.
7
Content available Exposure of hop growers to bioaerosols
61%
EN
Air sampling was performed during picking and sorting of hop (Humulus lupulus) cones on 19 hop farms located in eastern Poland. The concentration and composition of airborne microflora and the concentration of airborne dust and endotoxin were determined. Additionally, 7 samples of settled hop dust were collected and examined for the presence of microorganisms and endotoxin. Total concentrations of airborne microorganisms were within a range of 2.08-129.58 × 103 cfu/m3. Gram-positive bacteria formed 22.2-96% of the total count. Among them, prevailed corynebacteria and endospore-forming bacilli. Fungi constituted 3.7-65.4% of the total count. The dominant species were Penicillium citrinum, Alternaria alternata, and Cladosporium epiphyllum. Thermophilic actinomycetes and Gram-negative bacteria were detected in the air of only 10 and 6 farms, respectively. Airborne dust concentrations at the workplace ranged from 0.17-31.67 mg/m3. The concentrations of airborne endotoxin were in the range of 26-6250 ng/m3. In the samples of settled dust, the concentrations of total microorganisms ranged from 0.25 × 106 to 2.87 × 108 cfu/g. Gram-positive and Gram-negative bacteria constituted respectively 3.2-98% and 0-93.5% of the total count. Fungi formed 0-30.3% of the total count. The most common species were Penicillium spp. and Alternaria alternata. The concentrations of endotoxin were in the range of 312.5-6250 µg/g (median 6250 µg/g). The presence of microorganisms and endotoxin in the samples of settled dust was confirmed by electron microscopy. The hop growers seem to be exposed to lower concentrations of dust, microorganisms and endotoxin compared to other branches of agriculture. This may be partly due to antimicrobial properties of hop plant. Among microbial factors associated with hop dust, bacterial endotoxin and allergenic fungi pose the greatest potential hazard for exposed hop farmers.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.