Microbiological Control of Airborne Contamination in Hospitals

Abstract

Air samples from ten conventionally ventilated operating rooms were taken simultaneously by the sedimentation method and by the air sampler. The investigations showed that the number of colony forming units per cubic metre obtained with the sedimentation method was, on average, lower than those found with the impactor sampler (p 0.03). The most commonly isolated pathogenic species of bacteria were: Staphylococcus aureus, Enterococcus spp., Streptococcus z gr. B, Pseudomonas aeruginosa, Acinetobacter lwoffii and Alcaligenes faecalis. The dominant fungal species were Penicillium spp. and Cladosporium spp. When Tryptic Soy Agar with neutralising agents was used, the number of detected airborne micro-organisms was greater (p 0.01).

Bacterial Contamination of Indoor Air in Schools of Riyadh, Saudi Arabia

“…[13]. Strong relationship between occupant density, human activity and microorganisms concentration in the indoor air was reported elsewhere [32][33][34]. Among the five schools that were included during this study, it was found that the highest bacterial concentration in heavily populated in workplaces.…”

“…This study is in agreement with the work of, Li WM et al [34] who suggests that the highest bacterial concentration in heavily populated workplaces. While Fleische RM et al [32] states that in schools the highest level of bacterial contamination was detected in the corridor and in rooms. During lessons and after lessons the number of microorganisms was much lower.…”

“…During this study, the cases observed of the most common disease in the investigated schools between teachers and students varied between acute disease (sore throat, stomach ache, cold, fever, tonsillitis, flu cough, headache and dizziness) and chronic disease (asthma, anaemia, urinary tract infection, rheumatoid, eczema, chest allergy) ( Table 2). It was observed that the diseases were common when the student›s age was between (11-16) years but, the diseases were fewer when the teacher›s age was between (29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40). Results of this study confirm the considerable microbial contamination of most investigated school settings.…”

Aeromycology: studies of fungi in aeroplankton

“…Fungal spores present in the air are subjected to many studies with the use of spore traps, that may be passive, when spores drop down on certain surfaces or gather in containers, due to their gravity (Koch sedimentation method) or active, when the collection of spores is connected with swirling or sucking, that allows capturing of higher spore loads (Fleischer et al 2006). The most popular and advanced methods of spore trapping use volumetric samplers.…”

Indoor Airborne Microbial Burden of Operating Theatres in a Tertiary Hospital in South-Western Nigeria

“…About 10% of hospital acquired infections result in increased patient mortality, morbidity and length of hospital stay in addition to the overall costs of hospital admissions for post-operative surgery (Chacko et al, 2003;Reddy, 2012),Multiple sources have been previously reported as being associated with the contamination of the OT, including drainage of the wounds, ventilation systems, transportation of patients and collection bags, surgical team, degree of indoor traffic, theatre gown, foot wares, gloves, use of inadequately sterilized equipment and grossly contaminated surfaces (Okon et al, 2012;Fleischer et al, …”