Microbial contamination of mist therapy units on six pediatric wards.
A study was conducted in six pediatric wards to investigated factors that influence microbial contamination of mist therapy units. Most samples from nebulizer reservoirs were positive for gram-negative bacilli which multiplied rapidly in distilled water and reached levels as high as 3.0 X 10(8) viable microorganisms per ml. High prevalence rates of Pseudomonas aeruginosa and coliform bacteria as well as high levels of gram-negative bacilli were found to be associated with infrequent and inadequate cleaning and disinfection of the nebulizing equipment. In one of the wards exhibiting high rates, a move to new quarters permitted the implementation of improved cleaning and maintenance procedures for mist therapy units. The result was a significant reduction of microbial contamination. This study reemphasizes the role of microbiological surveillance in assuring proper care of nebulizing equipment in the hospital.
D000336:Aerosols; D000391:Air Microbiology; D006748:Hospital Departments; D006797:Housekeeping, Hospital; D008284:Maintenance and Engineering, Hospital; D010372:Pediatrics; D010564:Personnel, Hospital; D012138:Respiratory Therapy / Q000295:instrumentation*
D000336:Aerosols