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.
Reportable and uninterpretable PZA direct test results according to smear grading. The grading scale was based on WHO guidelines, as follows: negative (0 colonies/100 fields), scanty (1 to 9 colonies/100 fields), 1+ (10 to 99 colonies/100 fields), 2+ (1 to 10 AFB/field), or 3+ (>10 AFB/field).
