Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Survival rates produced by selected Mycobacterium tuberculosis clinical isolates. Twenty mice were infected with the indicated M. tuberculosis strain by the intratracheal route, and spontaneous death was recorded along the infection comparing with control animals infected with the laboratory strain H37Rv. *Statistically significant (P< 0·05), when compared with mice infected with H37Rv strain analysed by Kaplan–Meier test.
