No abstract

Polycyclic aromatic hydrocarbons (PAHs) formed as a result of incomplete combustion of organic compounds. It contains compounds that cause toxic, teratogenic, mutagenic and carcinogenic damage, such as heterocyclic aromatic amines, benzene and formaldehyde. PAHs can be found in industrial wastes, garbage, cigarette smoke, pesticides and flue gases and can contaminate air, water, soil and food. Although more than 100 PAH compounds are detected in nature, it is accepted that 16 PAH compounds have more harmful effects. It is important to determine the PAH exposure levels of feeds used in animal nutrition, since the contamination of feed plants and factory feeds with PAH compounds will indirectly affect human health. In this study, the physical and chemical properties of PAHs and their effects on animal production and indirectly on human health were compiled.

Sığırlarda solunum sistemi hastalıkları her yaş grubunda yaygın olarak görülmesine rağmen, özellikle yenidoğan buzağılarda daha fazla görülmektedir (1, 2). Neonatal dönemde (0-28 günlük) ortaya çıkan solunum sistemi hastalıklarına bağlı olarak ortaya çıkan gelişme geriliği veya buzağı kayıpları büyük ekonomik kayıplara yol açmaktadır (2, 3).Solunum sistemi hastalıklarında kan gazı analizlerinin yapılması, hastalıkların değerlendirilmesi açısından son derece