Related Experiment Video
Updated: Feb 20, 2026
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
[MLVA analysis and virulence profile of community-acquired methicillin-resistant Staphylococcus aureus causing
Fátima Rodríguez Acosta1, Wilma D Basualdo Acuña2, Héctor Castro2
1Departamento de Biología Molecular y Biotecnología, Departamento de Análisis Clínicos y Microbiología, Instituto de Investigaciones en Ciencias de la Salud, UNA, 2160 San Lorenzo, Paraguay.
Abstract:
Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) is one of the first causes of skin and soft tissue infections, and can also produce severe diseases such as osteomyelitis and pneumonia. The aim of this descriptive study was to determine the SCCmec type and virulence profile and to study the genetic diversity by MLVA analysis of 21 CA-MRSA isolates that infected Paraguayan children in 2010. The SCCmec type and virulence factors were performed by PCR and genetic diversity by MLVA (multiple locus variable analysis). All the isolates carried SCCmec cassette iv. hla, hlb and sea genes were detected in 28,6%, 9,5% and 4,8% respectively. The MLVA analysis showed high genetic diversity with congruent antibiotic resistance and virulence profiles. This study revealed the presence of CA-MRSA harbouring SCCmeciv with high genetic diversity, providing information not available in our country.
Insights
Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) in Paraguayan children showed high genetic diversity. All isolates carried SCCmec type iv, with varying virulence factors, indicating diverse infection profiles.
Area of Science:
- Infectious Diseases
- Microbiology
- Genetics
Background:
- Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) is a leading cause of skin and soft tissue infections.
- CA-MRSA can also lead to severe invasive diseases, including osteomyelitis and pneumonia.
Purpose of the Study:
- To characterize CA-MRSA isolates from Paraguayan children by determining SCCmec type and virulence factors.
- To analyze the genetic diversity of these CA-MRSA isolates using MLVA (multiple locus variable analysis).
Main Methods:
- Polymerase Chain Reaction (PCR) was used to identify SCCmec type and virulence factors (hla, hlb, sea genes).
- Multiple Locus Variable Analysis (MLVA) was employed to assess the genetic diversity of the CA-MRSA isolates.
Main Results:
- All 21 CA-MRSA isolates analyzed harbored the SCCmec cassette type iv.
- The prevalence of specific virulence genes detected was: hla (28.6%), hlb (9.5%), and sea (4.8%).
- MLVA analysis revealed significant genetic diversity among the isolates, with consistent antibiotic resistance and virulence profiles.
Conclusions:
- The study identified CA-MRSA strains with SCCmec type iv and high genetic diversity in Paraguayan children.
- This provides crucial, previously unavailable data on CA-MRSA epidemiology within the country.
