Pruden and her colleagues looked for genes bestowing resistance against tetracycline and sulfonamide, two antibiotics linked to urban and farm activity, in northern Colorado waters.

• 普鲁登和她的同事在科罗拉多州北部的水中寻找抵抗四环素和磺醯胺的基因，这两种抗生素都与市区和农村活动有关。