The study it describes, led by John Mitani, of the University of Michigan in Ann Arbor, is the first to offer a detailed picture of organised conflict between chimpanzees.

Michael Imperiale, a microbiologist at the University of Michigan, Ann Arbor, says TMAdV isn't necessarily a public health threat.

ANN ARBOR, Mich.---With school days just around the corner, a University of Michigan researcher has some advice for parents who want to increase their children's academic success.