Two Indiana geneticists are playing key roles in a national effort to map the DNA of body lice the tiny, biting insect that spreads typhus in developing nations.

• 两名印度科学家在描绘体虱的基因图谱的工作中发挥了关键的作用。体虱体积极小,在发展中国家它通过叮咬,传播斑疹伤寒。