PT  - JOURNAL ARTICLE
AU  - Lee, Martin L.
AU  - Kantrowitz, Julia L.
AU  - Ellis, Joyce E.
TI  - An Application of the Negative Binomial Distribution to a Problem in Microbiologically Clean Area Testing
DP  - 1982 Nov 01
TA  - PDA Journal of Pharmaceutical Science and Technology
PG  - 237--241
VI  - 36
IP  - 6
4099  - http://journal.pda.org/content/36/6/237.short
4100  - http://journal.pda.org/content/36/6/237.full
SO  - PDA J Pharm Sci Technol1982 Nov 01; 36
AB  - A method is discussed for monitoring areas that must be biologically clean. A negative binomial distribution was used to analyze data derived from the number of colonies formed on blood agar plates exposed in such areas for varying lengths of time. From this analysis, an upper bound for the number of colonies formed per hour was generated, which conformed to the NASA specifications for any given class of microbiologically clean areas.