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Ecotoxicity of bacterium-treated crude oil and dispersed crude oil and of Corexit only. All toxicity measurements were determined using the marine rotifer Brachionus manjavacas. All controls met the minimum requirement for survival (>90%). (A to C) Toxicity associated with Corexit 9500A alone (A), 0.5% (vol/vol) Macondo surrogate crude oil alone (B), and 1:50 Corexit 9500A-dispersed Macondo crude oil (C).
