Air and surface contamination patterns of meticillin-resistant Staphylococcus aureus on eight acute hospital wards.
J Hosp Infect
; 86(3): 201-8, 2014 Mar.
Article
en En
| MEDLINE
| ID: mdl-24529449
ABSTRACT
BACKGROUND:
Meticillin-resistant Staphylococcus aureus (MRSA) can be recovered from hospital air and from environmental surfaces. This poses a potential risk of transmission to patients.AIM:
To investigate associations between MRSA isolates recovered from air and environmental surfaces with those from patients when undertaking extensive patient and environmental sampling.METHODS:
This was a prospective observational study of patients and their environment in eight wards of a 700-bed tertiary care hospital during 2010 and 2011. Sampling of patients, air and surfaces was carried out on all ward bays, with more extended environmental sampling in ward high-dependency bays and at particular times of the day. The genetic relatedness of isolates was determined by DNA microarray profiling and spa typing.FINDINGS:
MRSA was recovered from 30/706 (4.3%) patients and from 19/132 (14.4%) air samples. On 9/132 (6.8%) occasions both patient and air samples yielded MRSA. In 32 high-dependency bays, MRSA was recovered from 12/161 (7.4%) patients, 8/32 (25%) air samples, and 21/644 (3.3%) environmental surface samples. On 10/132 (7.6%) occasions, MRSA was isolated from air in the absence of MRSA-positive patients. Patient demographic data combined with spa typing and DNA microarray profiling revealed four likely transmission clusters, where patient and environmental isolates were deemed to be very closely related.CONCLUSION:
Air sampling yielded MRSA on frequent occasions, especially in high-dependency bays. Environmental and air sampling combined with patient demographic data, spa typing and DNA microarray profiling indicated the presence of clusters that were not otherwise apparent.Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Microbiología Ambiental
/
Staphylococcus aureus Resistente a Meticilina
/
Centros de Atención Terciaria
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Hosp Infect
Año:
2014
Tipo del documento:
Article
País de afiliación:
Irlanda