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Multiple strains of C. difficile cause severe patient outcomes

No single strain associated with the worst cases of infectious diarrhea


2015-08-20
(Press-News.org) NEW YORK (August 20, 2015) - No single genetic strain of the widespread Clostridium difficile (C. difficile) bacteria appears to be any more harmful than other strains, according to new research published online today in Infection Control & Hospital Epidemiology, the journal of the Society for Healthcare Epidemiology of America.

The findings contradict previous research suggesting that the emergence of the most severe C. difficile infections (CDI) could be linked with a particular strain known as Ribotype 027 (R027). C. difficile is a highly infectious diarrhea that is the most common cause of healthcare-associated infections (HAI) in the United States.

"Clinical severity markers of CDI, such as white blood cell count and albumin level, a protein in blood, are more important predictors of severe outcomes than any specific strain, especially in hospitals with no single predominant strain," said Samuel L. Aitken, PharmD, lead author of the study.

This multicenter observational cohort study used data from more than 700 patients at seven hospitals in the Houston, TX area to assess disease severity at presentation and the clinical outcomes of patients with varying C. difficile strains. Researchers conducted epidemiologic strain typing of C. difficile to identify both the prevalence of different strains, as well as the impact of distinct strains on disease severity and patient outcomes.

Although C. difficile R027 was the most prevalent strain associated with severe onset of the disease, it was found to not be any more likely to cause severe outcomes than other C. difficile strains. However, researchers noted that continued use of non-C. difficile antibiotics was a strong predictor of severe CDI outcomes in all strains. The continued use of other antibiotics has previously been associated with prolonged diarrhea and CDI treatment failure.

Strain typing remains a valuable source of information for tracking emergence of different strains and may potentially influence treatment decisions, said Aitken, but clinical severity markers appear to be more important predictors for the determining the severity of CDI patient outcomes.

INFORMATION:

Samuel L. Aitken, M. Jahangir Alam, Mohamed Khaleduzzuman, Seth T. Walk, William L. Musick, Vy P. Pham, Jennifer Christensen, Robert Atmar, Yang Xie, Kevin W. Garey. "In the Endemic Setting, Clostridium difficile Ribotype 027 Is Virulent But Not Hypervirulent." Web (August 20, 2015).

About ICHE Published through a partnership between the Society for Healthcare Epidemiology of America and Cambridge University Press, Infection Control & Hospital Epidemiology provides original, peer-reviewed scientific articles for anyone involved with an infection control or epidemiology program in a hospital or healthcare facility. ICHE is ranked 13th out of 158 journals in its discipline in the latest Web of Knowledge Journal Citation Reports from Thomson Reuters.

SHEA is a professional society representing physicians and other healthcare professionals around the world with expertise and passion in healthcare epidemiology, infection prevention, and antimicrobial stewardship. SHEA's mission is to prevent and control healthcare-associated infections, improve the use of antibiotics in healthcare settings, and advance the field of healthcare epidemiology. SHEA improves patient care and healthcare worker safety in all healthcare settings through the critical contributions of healthcare epidemiology and improved antibiotic use. The society leads this specialty by promoting science and research, advocating for effective policies, providing high-quality education and training, and developing appropriate guidelines and guidance in practice. Visit SHEA online at http://www.shea-online.org, http://www.facebook.com/SHEApreventingHAIs and @SHEA_Epi.

About Cambridge Journals Cambridge University Press publishes over 350 peer-reviewed academic journals across a wide spread of subject areas, in print and online. Many of these journals are leading academic publications in their fields and together form one of the most valuable and comprehensive bodies of research available today.

For further information about Cambridge Journals, visit journals.cambridge.org.

About Cambridge University Press Cambridge University Press is part of the University of Cambridge. It furthers the University's mission by disseminating knowledge in the pursuit of education, learning and research at the highest international levels of excellence.


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[Press-News.org] Multiple strains of C. difficile cause severe patient outcomes
No single strain associated with the worst cases of infectious diarrhea
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