Degradation of 17α-methyltestosterone by Rhodococcus sp. and Nocardioides sp. isolated from a masculinizing pond of Nile tilapia fry

► MT-degrading bacteria were isolated from a masculinization pond of Nile Tilapia fry. ► They were related to Rhodococcus sp. and Nocardioides sp. ► All MT-degrading bacteria transformed MT to compounds without androgenic activity.