They indicated that stimulation with Acinetobacter LPSs induced significantly higher TNF-α secretion even at 1 ng/mL LPS. They did not mention the levels of endotoxic activity of the Acinetobacter LPSs in that research, but they explained that Acinetobacter baumannii LPS exhibited endotoxic activity and cytokine secretions equal to those of Escherichia coli LPS