Occult methicillin-resistant Staphylococcus aureus abscesses in 2 pediatric patients

Henry M Feder1

  • 1University of Connecticut Health Center, Farmington, Connecticut 06030, USA. feder@nso2.uchc.edu

Clinical Pediatrics
|September 18, 2007
PubMed

Insights

Severe MRSA infections, often linked to Panton-Valentine leukocidin (PVL), are increasing. Consider MRSA antibiotics for children with unexplained fever and a family history of MRSA infections.

Area of Science:

  • Pediatric Infectious Diseases
  • Bacteriology
  • Public Health

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) infections are rising globally.
  • Severe MRSA infections, including necrotizing pneumonia and skin abscesses, are increasingly reported.
  • The Panton-Valentine leukocidin (PVL) virulence factor is frequently associated with severe MRSA infections.

Observation:

  • Two pediatric cases of occult deep tissue abscesses are presented.
  • Both children initially presented with fever of unknown origin.
  • A family history of severe MRSA skin abscesses was noted in both cases.

Findings:

  • Deep tissue abscesses caused by PVL-positive MRSA evolved in both children.
  • Early diagnosis and treatment are crucial for managing severe MRSA infections.

Implications:

  • Empiric antibiotic therapy targeting MRSA should be considered for hospitalized infants and children with unexplained fever.
  • A family history of MRSA infection warrants heightened clinical suspicion for severe MRSA disease.
  • Understanding the role of PVL in severe MRSA infections is critical for effective treatment strategies.

Related Concept Videos

Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...