Endotoxin lies in the inner part of the gram-negative cell walls.Endotoxin releases due to the cell-wall disintegration and exocytosis.

• 内毒素存在于革兰阴性细菌菌体的细胞壁内,在细菌死后细胞壁崩解时释出,活菌亦可以发疱形式将内毒素释出。