While US national reporting of active TB began in 1953,1
there are only four states that require reporting of a positive
tuberculin skin test (TST). These are South Dakota (SD), Missouri (MO),
Indiana (IN; Indianapolis excluded), and Arkansas (nursing homes and
prisons). We investigated the annual positive TST rate in these states.
The Department of Health TB control programs of all four states were
contacted. Longitudinal data were available from three states: SD, MO,
and IN. These were accumulated and analyzed for patterns and
relationship to demographic characteristics. Positive TST rate
increased in all three states: in SD from 715 to 795 cases (11%
increase) from 1994 to 1997; in MO from 1,095 to 4,083 cases (270%
increase) from 1991 to 1997; and in IN from 4,612 to 4,624 cases from
1996 to 1997. Denominator data were not available.