title: Some factors affecting the efficiency of settle plates.
abstract: An evaluation has been made of some of the factors which may affect the efficiency of settle plates. Water loss was found to be linear with time. Although the count was reduced over an 8 h period the reduction was not statistically significant. No difference in total bacterial counts could be detected between four, 1/2 h exposures and one, 2 h exposure. The addition of water and the surface area of the plates had no effect on the total count.
mesh_terms: D000362:Agar; D000391:Air Microbiology; D001419:Bacteria / Q000254:growth & development; D001431:Bacteriological Techniques; D006018:Glycols / Q000494:pharmacology; D013997:Time Factors; D014867:Water
chemical_list: D006018:Glycols; D014867:Water; D000362:Agar