Naslov
Bioaerosol in laying hen house

Autori
Vučemilo, Marija ; Vinković, Bara ; Matković, Kristina ; Brezak, Renata

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Animal health, animal welfare and biosecurity / Aland, A. - Tartu : ISAH, 2007, 297-301

Skup
XIII International congress in animal hygiene

Mjesto i datum
Tartu, Estonija, 17.06.2007. - 21.06.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bioaerosol; laying hen; bacteria; fungi; dust

Sažetak
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&#8211; 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.

Izvorni jezik
Engleski

Znanstvena područja
Veterinarska medicina

POVEZANOST RADA