Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Volume 3, Number 3—September 1997

Synopsis

Using a Mathematical Model to Evaluate the Efficacy of TB Control Measures

Laura Gammaitoni and Maria Clara NucciComments to Author 
Author affiliations: University of Perugia, Perugia, Italy

Main Article

Table 2

Percentage of purified protein derivative conversions predicted to occur during various procedures, by using various environmental control strategies and respiratory protective devices

Control measuresa Bronchoscopy
q=6, t=150 minb Abscess irrigation
q=38, t=150 min Autopsy
q=90, t=150 min Intubation
q=514, t=66 min
GV 34.3 93 99.9 61.7
GV+HF 13.6 60.5 90 30.1
GV+UVGI 5.8 31.4 60.5 13.7
GV+SM 22.3 79.7 98.1 43.8
GV+HF+SM 8.4 42.7 74.8 19.3
GV+UVGI+SM 3.5 20.2 42.8 8.5
GV+DMR 5.9 32 61.5 13
GV+HF+DMR 2.1 12.6 28.3 5.1
GV+UVGI+DMR 0 .9 5.3 12.6 2.1
GV+HM 1.3 7.7 17.9 2.8
GV+HF+HM 0.4 2.7 6.7 1.1
GV+UVGI+HM 0.2 1.1 2.8 0.4

aGV=general ventilation; HF=HEPA filtration; SM=surgical masks; DMR=dust/mist respirators; HM=HEPA masks.
bq=quanta; t=time.

Main Article

Top of Page

USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO