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Image of intravenous infusion tube colonized by Klebsiella pneumoniae biofilm: from left to right, (A) not colonized negative control, (B) treated positive control, (C) treated with 500 μg/ml methanol extract of C. sempervirens , (D) treated with 500 μg/ml Eo of C. sempervirens and (E) treated with 500 μg/ml ceftriaxone as reference antibiotic.
