Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: November 4, 2004
Publication Date: November 4, 2004
Citation: Kolz, A., Moorman, T.B., Ong, S., Scoggin, K.D. 2004. Degradation of tylosin in aerated and anaerobic swine manure lagoons [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, WI.
Antibiotics have been detected in rivers and streams; and, confined animal feeding operations (CAFOs) are thought to be one source. Tylosin is an antibiotic commonly used in swine production and this research examined the fate of tylosin in samples from two swine manure lagoons. Immediately after addition to lagoon samples tylosin was rapidly dissipated, except under anaerobic conditions where 5 to 15% of the added tylosin persisted for long periods. Biotic and abiotic degradation and binding of tylosin to the solid manure particles contribute to the loss. Dihydrodesmycosin and an unknown degradate with molecular mass of 933.5 amu were detected. In addition to these degradates, shifts in the proportions of tylosin A, B, and D were observed. The results indicate that most tylosin entering the lagoon system will be degraded or bound, but since anaerobic conditions are common, some tylosin will enter farmers' fields when the lagoon slurries are applied to the soil.