Camden County Health Department reported Friday that a person from Boone County who had attended the parties tested positive for the virus.
Speaking at a news conference in Jefferson City on Wednesday, Dr. Randall Williams, the director of the Department of Health and Senior Services, said no more cases have been uncovered since, the St. Louis Post-Dispatch reported.
Officials have been trying to trace anyone who may have come into contact with the one person who has tested positive, releasing a brief timeline of their whereabouts including stops at a bar called Backwater Jacks, a bar and restaurant that has a pool, as well as a dining and pool venue called Shady Gators and Lazy Gators.
For some infected people, especially older adults and people with existing health problems, the virus can cause severe illness or death. But for most people, it causes mild or moderate symptoms, such as fever and cough, that clear up in two to three weeks.
Missouri on Wednesday reported 192 additional positive cases, bringing the state's total to nearly 13,800, and three additional deaths, increasing the toll to 786.