Colleges combating coronavirus turn to stinky savior: sewage

SALT LAKE CITY (AP) — Days after he crossed the country to start college, Ryan Schmutz received a text message from Utah State University: COVID-19 had been detected at his dorm.

Within 10 minutes, he dropped the crepes he was making and was whisked away by bus to a testing site.

“We didn’t even know they were testing,” said Schmutz, who is 18 and from Omaha, Nebraska. “It all really happened fast.”

Schmutz was one of about 300 students quarantined to their rooms last week, but not because of sickness reports or positive tests. Instead, the warning bells came from the sewage.

Colleges across the nation — from New Mexico to Tennessee, Michigan to New York — are turning tests of waste into a public health tool. The work comes as institutions hunt for ways to keep campuses open despite vulnerabilities like students' close living arrangements and drive to socialize. The virus has already left its mark with outbreaks that have forced changes to remote learning at colleges around the country.

The tests work by detecting genetic material from the virus, which can be recovered from the stools of about half of people with COVID-19, studies indicate. The concept has also been used to look for outbreaks of the polio virus.

Sewage testing is especially valuable because it can evaluate people even if they aren’t feeling sick and can detect a few cases out of thousands of people, experts say. Another wastewater-flagged quarantine of 300 students at Arizona State University, for example, turned up two cases. Both were students who were asymptomatic, but they could potentially still have spread the virus.

“That’s just tremendously valuable information when we think about the setting of a college dorm, and how quickly this disease can spread through that...