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Characteristics of airborne micro-organisms in a neurological intensive care unit: Results from China
Yao Yu1, Sufeng Yin2, Yi Kuan3
1Department of Neurology, Peking University People's Hospital, Beijing, China.
Objective:
To describe the characteristics of airborne micro-organisms in the environment in a Chinese neurological intensive care unit (NICU).
Methods:
This prospective study monitored the air environment in two wards (large and small) of an NICU in a tertiary hospital in China for 12 months, using an LWC-1 centrifugal air sampler. Airborne micro-organisms were identified using standard microbiology techniques.
Results:
The mean ± SD number of airborne bacteria was significantly higher in the large ward than in the small ward (200 ± 51 colony-forming units [CFU]/m(3) versus 110 ± 40 CFU/m(3), respectively). In the large ward only, the mean number of airborne bacteria in the autumn was significantly higher than in any of the other three seasons. A total of 279 airborne micro-organisms were identified (large ward: 195; small ward: 84). There was no significant difference in the type and distribution of airborne micro-organisms between the large and small wards. The majority of airborne micro-organisms were Gram-positive cocci in both wards.
Conclusion:
These findings suggest that the number of airborne micro-organisms was related to the number of patients on the NICU ward.
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