Health officials say three more Sheboygan students have an active case of tuberculosis, in addition to the case confirmed last month.
All four students are members of the same family. Health officer Dale Hippensteel says the county has eight infectious cases, all within the same extended family.
TB can be life-threatening if left untreated. Hippensteel says the eight people with confirmed cases are receiving treatment. Tuberculosis can be spread through coughing, sneezing or talking.
About two dozen students who share a classroom throughout the day with the first infected student were tested and found to be negative.
Health officials told The Sheboygan Press they're in the process of compiling a list of students to be tested who share two or more classes with the newly infected students.