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.
The bacterial counts of indoor aerosols in the two housing system houses. NRS, plastic-net housing system; LRS, floor-litter housing system; a,b. Means with different superscripts within each period are significantly different (p < 0.05). Lines connected above the bars indicate the standard deviation. wk, week.
