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.
Effect of storage on bacterial load. Box plots of bacterial numbers per 50 microscopic fields in 3+ and 2+ slides. Boxes show median values and the interquartile ranges, the whiskers denote 2.5th and 97.5th percentiles and the circles indicate the outlier values. 1 M and 2 M refer to 1 month and 2 months of sputum storage at -20°C.
