Stafilococo meticilino resistente de la comunidad. un patógeno emergente

Community-Acquired MRSA: Evolving Pathogens
William T. Basco, Jr., MD

The Pediatric Academic Societies Annual Meeting was held May 14-17, 2005 at the Washington, DC Convention Center. Over 5000 participants attended the meeting. Medscape conference coverage will include an update on methicillin-resistant Staphylococcus aureus (MRSA), particularly community-acquired MRSA (CA-MRSA), a brief update on immunizations, and an extensive review of research on the obesity epidemic in the United States and the metabolic syndrome.
Epidemiology Overview

A "Hot Topic" session sponsored jointly by the PAS and the Pediatric Infectious Diseases Society focused on the increasing difficulties posed by CA-MRSA. The epidemiology of MRSA was described by Daniel Jernigan,[1] Centers for Disease Control and Prevention, Atlanta, Georgia. He noted that when MRSA resistance began in the 1970s it was mostly a phenomenon of strains isolated within hospitals. However, by the late 1990s or certainly early 2000's, CA-MRSA had emerged.

Defining a strain as CA-MRSA is not as easy as it may seem. In the final analysis, it is more of a syndromic diagnosis. In order to consider an MRSA isolate as "community associated," the patient should not have had a recent hospitalization, recent in-dwelling catheters or other hardware, or have undergone any surgical procedure within the past year. In addition, CA-MRSA should have an antibiotic sensitivity profile that demonstrates sensitivity to most antibiotics, in contrast to the profile of healthcare associated MRSA (HA-MRSA). http://www.medscape.com/viewarticle/507869