Indole degradation in a model system and in poultry manure was studied using an enrichment culture of two Acinetobacter species; Acinetobacter toweneri NTA1-2A and Acinetobacter guillouiae TAT1-6A.Degradation of indole was quantified using reverse phase high performance m1917a1 kelly helmet liquid chromatography (HPLC).The two strains were capable of degrading initial concentrations of indole ranging from 58.
58–300 mg/L.The degradation efficiency was 66.36% (NTA1-2A), 94.
87% (TAT1-6A), and 96.00% (mix) in 6 days when the initial concentration <300 mg/L.The strains were tested for enzymatic activity using 120 mg/L indole.
The enzyme extracts of NTA1-2A and TAT1-6A from culture medium degraded indole completely, and no appreciable change of indole concentration was witnessed in the control group.The NTA1-2A, TAT1-6A, and the mix of strains were also used for in vivo poultry manure fermentation and removed 78.67%, 83.
28%, and 83.70% of indole, respectively in 8 d.The strains showed a statistically whip carbon magnum significant difference (p < 0.
05) in indole removal efficiency compared with the control, but no significant difference between the two strains and the mix in indole removal capacity.We concluded that A.toweneri NTA1-2A and A.
guillouiae TAT1-6A are promising strains to remove indole and its derivatives to control the notorious odor in poultry and other livestock industries.