nebulizers placed in a surgical intensive care unit that had higher numbers of bacteria and a predominance of gram-negative organisms in background air had a significantly higher incidence of nebulizer contamination ( 33.0 % ) than did nebulizers placed in a non-patient-care area that had lower bacterial counts and a predominance of gram-positive organisms ( 0 % ) ( p less than .05 ) .
C0004611
bacteria
C0029235
organisms