Bioaerosol in laying hen house (CROSBI ID 528511)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Vučemilo, Marija ; Vinković, Bara ; Matković, Kristina ; Brezak, Renata
engleski
Bioaerosol in laying hen house
Intensive production and housing of laying hens result in a significant amount of hazardous pollutants in the air of poultry house. Under specific conditions, these pollutants can affect the health of both poultry and people who work in poultry houses. The study was carried out in winter period on a farm with a capacity of 17000 Shaver hybrid laying hens from 25th week of production. Laying hens were housed in cages, 8– 10 per cage. Samples were collected in the morning once a week for six weeks, at 5 sites in the house. Air was sampled by use of a Merck MAS-100 (Merck KgaA, Darmstadt, Germany) device onto commercial nutrient and Sabouraud agar (Biolife, Milan, Italy). Upon incubation, microorganisms grown on the medium (bacteria and fungi) were counted and predominant species were inoculated for determination. Dust was sampled by an SKC pump (SKC Ltd., Blandford Forum, UK) on filters (Whatman International Ltd., Maidstone, UK). Temperature (t °C), relative humidity (rh %) and air velocity (w m/s) were determined by a Testo 400 (Testo Inc., Lenzkirch, Germany) device. The concentration of ammonia and carbon dioxide was determined by a Dräger-Multiwarn II (Dräger, Darmstadt, Germany) device. The measured values of study parameters were processed by Microsoft Excel and Statistica 6 software. Descriptive statistics was employed and statistical significance at 5% (p<0.05) was determined by Student's t-test. The concentration of bacteria ranged from 1.6 x 102 to 2.7 x 103 cfu/m3, of fungi from 0.8 x 102 to 6.9 x 102 cfu/m3, and of dust from 1.6 to 3.8 mg/m3. The mean level of ammonia was between 5.87 and 9.22 ppm. The predominant bacteria were from the genera Staphylococcus and Streptococcus, and fungi from the genera Aspergillus and Penicillium. The results on all microclimate parameters were in line with recommended standards. The low air count of the bacteria, fungi and dust could be attributed to the relatively low temperature recorded in the housing and its environment.
bioaerosol; laying hen; bacteria; fungi; dust
nije evidentirano
nije evidentirano
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nije evidentirano
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Podaci o prilogu
297-301-x.
2007.
objavljeno
Podaci o matičnoj publikaciji
Animal health, animal welfare and biosecurity
Aland, A.
Tartu: ISAH
Podaci o skupu
XIII International congress in animal hygiene
predavanje
17.06.2007-21.06.2007
Tartu, Estonija