Michigan parasite outbreak surpasses 700 cases

Michigan is battling a fast-moving outbreak of a diarrheal parasite, with case counts climbing past 700 as health officials scramble to identify a common source. The speed of the spread suggests a shared food or water exposure rather than person-to-person transmission, though investigators have not yet pinpointed the origin. The outbreak is one of the largest of its kind seen in the state in recent years.