MRSA dynamic circulation between the community and the hospital setting: New insights from a cohort study - 15/01/20
Study Group of S. aureus in Córdoba, Argentinap
Alejandra Corso n, Adrián G. Turjanski o, José L. Bocco a, Claudia Sola a, ⁎
Highlights |
• | MRSA carriage at admission was of 4.2%, children: 6.1% and adult: 2.5%, Argentina. |
• | Higher CA-MRSAG carriage in children than in adult. |
• | All acquisitions were CA-MRSAG, acquisition rate was 2.3/1000 patient-days at-risk. |
• | 3.2% of patients admitted for ≥3 days were discharged carrying MRSA, most CA-MRSAG. |
• | Most imported and acquired MRSA belonged to CA-MRSA ST30-IV and ST5-IV clones. |
Summary |
Dissemination of methicillin-resistant-Staphylococcus aureus/(MRSA) is a worldwide concern both in hospitals [healthcare-associated-(HA)-MRSA] and communities [community-associated-(CA)-MRSA]. Knowledge on when and where MRSA colonization is acquired and what clones are involved is necessary, to focus efforts for prevention of hospital-acquired MRSA-infections.
Methods |
A prospective/longitudinal cohort study was performed in eight Argentina hospitals (Cordoba/ October-December/2014). Surveillance cultures for MRSA (nose-throat-inguinal) were obtained on admission and at discharge. MRSA strains were genetically typed as CA-MRSAG and HA-MRSAG genotypes.
Results |
Overall, 1419 patients were screened and 534 stayed at hospital for ≥3 days. S. aureus admission prevalence was 30.9% and 4.2% for MRSA. Overall MRSA acquisition rate was 2.3/1000 patient-days-at-risk with a MRSA acquisition prevalence of 1.96% (95%CI: 1.0%-3.4%); 3.2% of patients were discharged back to community with MRSA. CA-MRSAG accounted for 84.6% of imported, 100.0% of hospital-acquired and 94% of discharged MRSA strains. Most imported and acquired MRSA strains belonged to two major epidemic CA-MRSA clones spread in Argentina: PFGEtypeI-ST5-IVa-t311-PVL+ and PFGEtypeN/ST30-IVc-t019-PVL+.
Conclusions |
CA-MRSA clones, particularly ST5-IV-PVL+ and ST30-IV-PVL+, with main reservoir in the community, not only enter but also are truly acquired within hospital, causing healthcare-associated-hospital-onset infections, having a transmission capacity greater or similar than HA-MRSAG. This information is essential to develop appropriate MRSA infection prevention-control programs, considering hospital and community.
Le texte complet de cet article est disponible en PDF.Keywords : MRSA, MRSA carriage, CA-MRSA, Hospital-acquired infections, ST5-IV, ST30-IV, Argentina
Plan
Vol 80 - N° 1
P. 24-37 - janvier 2020 Retour au numéro
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