Nevertheless, the risk of bacterial contamination exists with any sterile equipment that is employed in an operating room setting. 然而，不管在手術(shù)室環(huán)境內使用什么無(wú)菌的設備，細菌污染的風(fēng)險都是存在的。
That sample did not match a B. subtilis strain found in Ivins' lab, says Bannan, but the bacterial contamination still could have come from somewhere else in Ivins' institution. 布南說(shuō)，盡管樣本和在埃文斯實(shí)驗室里面發(fā)現的枯草芽孢桿菌不匹配，但是這些細菌污染也有可能來(lái)自埃文斯所在的研究機構的其他某些地方。
