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The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites

INTRODUCTION: The identification of patients infected and/or colonised by methicillin resistant Staphylococcus aureus (MRSA) is necessary for the timely introduction of measures for infection control. We compared the diagnostic efficacy of combinations of MRSA surveillance swabs routinely taken by h...

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Autores principales: Grmek Kosnik, Irena, Storman, Alenka, Petrovic, Ziva, Robnik, Slavica, Dermota, Urska, Zohar Cretnik, Tjasa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: De Gruyter 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5329782/
https://www.ncbi.nlm.nih.gov/pubmed/28289460
http://dx.doi.org/10.1515/sjph-2017-0004
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author Grmek Kosnik, Irena
Storman, Alenka
Petrovic, Ziva
Robnik, Slavica
Dermota, Urska
Zohar Cretnik, Tjasa
author_facet Grmek Kosnik, Irena
Storman, Alenka
Petrovic, Ziva
Robnik, Slavica
Dermota, Urska
Zohar Cretnik, Tjasa
author_sort Grmek Kosnik, Irena
collection PubMed
description INTRODUCTION: The identification of patients infected and/or colonised by methicillin resistant Staphylococcus aureus (MRSA) is necessary for the timely introduction of measures for infection control. We compared the diagnostic efficacy of combinations of MRSA surveillance swabs routinely taken by health institutions in the country. METHODS: All surveillance samples, which were sent for a microbiological analysis to detect MRSA with the culture method in 2014, in the three departments for medical microbiology of the National Laboratory for Health, Environment and Food, were included in this study. RESULTS: Among 65,251 surveillance cultures from 13,274 persons, 1,233 (2.1%) were positive (490 positive persons). Prevailing positive surveillance cultures were throat swabs (31.3%), followed by nose swab (31.2%), skin swab (18.9%), perineum (16.4%) and wound swabs (1.4%). The contribution of other samples, such as aspirate, urine and excreta, was under 1%. We found no statistically significant differences in the frequency of detection of a positive patient, if the combination of samples NTS (nose, throat, skin) or NTP (nose, throat, perineum) was analysed. However, statistically significant differences were confirmed when any of the anatomic sites would be omitted from the sets of NTP and NTS (chi square; p<0.01). Adding additional samples resulted in only 24 additional positive patients (4.9%). CONCLUSIONS: The results indicate that increasing the number of surveillance cultures above three does not add much to the sensitivity of MRSA surveillance, the exception could be wound. The swabs from the perineum and from the skin are exchangeable.
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spelling pubmed-53297822017-03-13 The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites Grmek Kosnik, Irena Storman, Alenka Petrovic, Ziva Robnik, Slavica Dermota, Urska Zohar Cretnik, Tjasa Zdr Varst Original Scientific Article INTRODUCTION: The identification of patients infected and/or colonised by methicillin resistant Staphylococcus aureus (MRSA) is necessary for the timely introduction of measures for infection control. We compared the diagnostic efficacy of combinations of MRSA surveillance swabs routinely taken by health institutions in the country. METHODS: All surveillance samples, which were sent for a microbiological analysis to detect MRSA with the culture method in 2014, in the three departments for medical microbiology of the National Laboratory for Health, Environment and Food, were included in this study. RESULTS: Among 65,251 surveillance cultures from 13,274 persons, 1,233 (2.1%) were positive (490 positive persons). Prevailing positive surveillance cultures were throat swabs (31.3%), followed by nose swab (31.2%), skin swab (18.9%), perineum (16.4%) and wound swabs (1.4%). The contribution of other samples, such as aspirate, urine and excreta, was under 1%. We found no statistically significant differences in the frequency of detection of a positive patient, if the combination of samples NTS (nose, throat, skin) or NTP (nose, throat, perineum) was analysed. However, statistically significant differences were confirmed when any of the anatomic sites would be omitted from the sets of NTP and NTS (chi square; p<0.01). Adding additional samples resulted in only 24 additional positive patients (4.9%). CONCLUSIONS: The results indicate that increasing the number of surveillance cultures above three does not add much to the sensitivity of MRSA surveillance, the exception could be wound. The swabs from the perineum and from the skin are exchangeable. De Gruyter 2016-07-28 /pmc/articles/PMC5329782/ /pubmed/28289460 http://dx.doi.org/10.1515/sjph-2017-0004 Text en © National Institute of Public Health, Slovenia http://creativecommons.org/licenses/by-nc-nd/3.0 This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
spellingShingle Original Scientific Article
Grmek Kosnik, Irena
Storman, Alenka
Petrovic, Ziva
Robnik, Slavica
Dermota, Urska
Zohar Cretnik, Tjasa
The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites
title The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites
title_full The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites
title_fullStr The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites
title_full_unstemmed The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites
title_short The evaluation of MRSA surveillance cultures by the number and combinations of anatomical sites
title_sort evaluation of mrsa surveillance cultures by the number and combinations of anatomical sites
topic Original Scientific Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5329782/
https://www.ncbi.nlm.nih.gov/pubmed/28289460
http://dx.doi.org/10.1515/sjph-2017-0004
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