id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-313971-czcs1y9w	Zhao, Yang	Airborne Microorganisms From Livestock Production Systems and Their Relation to Dust	2014-04-16		.txt	text/plain	15181	779	45	Specifically, in section 2, we identify the sources, species, size distributions, and concentrations of Identifying the source of microorganisms and dust in livestock production systems helps to elucidate how airborne transmission is generated, and ultimately can help to develop and implement strategies that prevent such transmission from beginning (Bull et al., 2006; Cambra-Lopez, 2010) . Investigations of the size distribution of microorganisms and dust in livestock production systems may provide a useful overview of their quantitative importance, indicate the health risk for human and animals, and facilitate the establishment and evaluation of control techniques. Previous studies showed that the biological decay of airborne microorganisms was species-dependent and was determined by many external factors, such as humidity, oxygen concentration, temperature, ozone concentration, radiation (UV, γ -ray, X-ray), air ions, and air pollutants (CO, SO 2 , and NO x ; Benbough, 1971; Lighthart, 1973) .	./cache/cord-313971-czcs1y9w.txt	./txt/cord-313971-czcs1y9w.txt