Other notable court cases have shown similar results, including the Mike Tyson trial of the 1990s. Bedspreads in an Indianapolis hotel in the trial found body fluids from Tyson but also other people. That news released an avalanche of TV news lab tests in at least a dozen cities. Indianapolis station WTHR, for example, found dried semen and several other body fluids on bedspreads and blankets in each of four hotels. The cleanliness of hotel bedspreads is hard to gauge.
Housekeepers typically conduct sight tests when cleaning rooms at most hotels.
If it has a visible stain, it's removed. Otherwise it's not. There are some sanitation issues, especially with the hepatitis B virus, which lives in body fluids and can last a week or longer. But I do think the hotel and lodging organizations are more aware today of these bio-security issues. The agency that enforces the hotel sanitation section of the Iowa Code is the Iowa Department of Inspections and Appeals, which conducts an inspection once every two years unless there is a complaint.