[Resistance to antibiotics of Staphylococcus aureus responsible of osteoarticular infections]

Area of Science:

• Pediatric Infectious Diseases
• Microbiology
• Molecular Epidemiology

Background:

• Osteo-articular infections are common invasive Staphylococcus aureus infections in children.
• Panton-Valentine leukocidin (PVL) production by S. aureus correlates with increased disease severity, irrespective of methicillin resistance.
• Community-acquired methicillin-resistant S. aureus (CA-MRSA) strains are increasingly implicated in pediatric osteo-articular infections.

Purpose of the Study:

• To highlight the role of PVL in the severity of pediatric osteo-articular infections.
• To discuss the increasing prevalence and molecular characteristics of CA-MRSA in this context.
• To emphasize the need for epidemiological surveillance of these virulent strains.

Main Methods:

• Review of existing literature on Staphylococcus aureus osteo-articular infections in children.
• Analysis of the association between PVL production and disease severity.
• Identification of molecular markers (SCCmec types IV/V, PVL genes) associated with CA-MRSA.
• Discussion of risk factors for CA-MRSA acquisition.

Main Results:

• PVL production by S. aureus is a key factor in enhancing the severity of osteo-articular infections in children.
• CA-MRSA, often PVL-positive and susceptible to other antibiotics, are increasingly prevalent.
• SCCmec types IV or V linked with PVL genes are molecular markers for CA-MRSA.
• Young age and overcrowding are identified risk factors for CA-MRSA acquisition.

Conclusions:

• PVL-producing S. aureus significantly worsens pediatric osteo-articular infections.
• The global rise of CA-MRSA necessitates focused epidemiological monitoring.
• Understanding the molecular epidemiology of CA-MRSA is crucial for public health strategies.