chemicals into the environment from manufacturing, use, and disposal. Environ Health
Perspect 110:213–220
Wall R, Strong L (1987) Environmental consequences of treating cattle with the antiparasitic drug
ivermectin. Nature 327:418–421
Westergaard K, Muller AK, Christensen S, Bloem J, Sorensen SJ (2001) Effects of tylosin as a
disturbance on the soil microbial community. Soil Biol Biochem 33:2061–2071
Wolters A, Steffens M (2005) Photodegradation of antibiotics on soil surfaces: laboratory studies
on sulfadiazine in an ozone-controlled environment. Environ Sci Technol 39:6071–6078
314 A.B.A. Boxall