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PubMed · 1730562

Detecting removable surface contamination.

R C Klein·I Linins·E L Gershey
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Abstract

Although surveying for radioactive contamination by wiping surfaces is the norm, this practice can be highly variable and may be inefficient for detecting low-energy beta emitters. Relying on wipe testing may likewise be an inefficient use of personnel and may seriously underrepresent the amount of contamination present. In general practice, it is better to clean and, where applicable, renew surfaces regularly as part of standard operating protocols and work practices.

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Equipment ContaminationLaboratoriesRadioactive PollutantsJournal Article

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R C Klein, I Linins, E L Gershey. 1992. Detecting removable surface contamination.. https://doi.org/10.1097/00004032-199202000-00010

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Clonality of clinical methicillin-resistant Staphylococcus epidermidis isolates in a neonatal intensive care unit.

OBJECTIVE: Study of the clonality of methicillin-resistant Staphylococcus epidermidis responsible of epidemic infections in a neonatal intensive care unit. PATIENTS AND METHODS: All S. epidermidis isolates (mecA+) were collected during the epidemic period (December 2003-September 2004) from different pathological products of newborns. Isolates were characterized by genotyping in pulsed-field gel electrophoresis and by electrophoretic profiles obtained by PCR-based analysis of inter-IS256 spacer polymorphisms. RESULTS: Twenty methicillin-resistant S. epidermidis isolates were collected from newborns during the epidemic period and represented 41.6% of the total isolates of S. epidermidis, which is the first Staphylococcus species isolated from the unit. These isolates were collected from blood cultures (80%), vascular catheters (5%), pus (10%), and intra-tracheal tube (5%). Six genotypic profiles were individualized: type A, type B, type C, type D, type E, and type F, with clear dominance of type A. Five different PCR patterns were found with poor correlation to genotypes defined by PFGE. CONCLUSION: Neonatal nosocomial outbreak of methicillin-resistant S. epidermidis was caused by multiple clones of this species with predominance of one epidemic and multiresistant clone. This clone may be transmitted between babies and was able to persist in the unit. PCR IS 256 proved to be less discriminative than PFGE for typing MRSE.

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