Her goal was to test their effectiveness against laboratory cultures of a variety of disease-causing parasites, with the aim of isolating any active principles they might contain.

她的目标是测试它们对实验室培养的各种致病寄生虫的有效性，目的是分离出它们可能包含的任何活性成分。

To explore the matter, they grew laboratory cultures of the sorts of epithelial cells that line human airways and monitored their gene-expression profiles when exposed to LasB, a toxic enzyme produced by the bacterium.

为了探究这一问题，他们在实验室培养了人体呼吸道内的各种上皮细胞，并监测了它们在接触LasB时的基因表达谱，LasB是一种由细菌产生的有毒酶。