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Updated: May 22, 2025
Multiplex PCR Assay for Typing of Staphylococcal Cassette Chromosome Mec Types I to V in Methicillin-resistant Staphylococcus aureus
Published on: September 5, 2013
First nationwide case - case study on factors associated with emerging methicillin-resistant Staphylococcus aureus
Johanna J Young1,2, Tjede Funk1,2, Tinna Ravnholt Urth1
1Department of Infectious Disease Epidemiology and Prevention, Statens Serum Institut, Copenhagen, Denmark.
Abstract:
Methicillin-resistant Staphylococcus aureus (MRSA) spa type t4549 is increasingly prevalent in Denmark, yet its epidemiological sources remain unclear. This study aimed to generate hypotheses about possible risk factors that may be associated with MRSA t4549 infections. We conducted a nationwide case - case questionnaire study comparing MRSA t4549 cases to other MRSA types (t002, t008, t127, t304, and t223) reported between January 2022 and November 2023. The analysis, which included descriptive statistics and logistic regression, found that 75% of MRSA t4549 cases were male. Infections were significantly more frequent in the foot (28%) and toe (54%) compared to other MRSA types. Key risk factors identified were contact with pheasants (OR = 8.70; 95%CI 1.25-174.29), participation in indoor team sports (OR = 7.54, 95%CI: 1.58-54.82) and swimming (OR = 4.15, 95%CI: 1.97-9.03). Although the limited number of cases warrants cautious interpretation, it is crucial to emphasize the need for preventive measures at both the individual and sports facility levels. Further environmental studies are needed to clarify the role of the environment and wildlife in MRSA t4549 transmission. The increasing prevalence of this spa type in Denmark underlines the importance of implementing effective public health strategies to reduce the risk of MRSA transmission.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) spa type t4549 is rising in Denmark. Risk factors include contact with pheasants, indoor team sports, and swimming, with infections often in the feet.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) spa type t4549 is emerging in Denmark.
- The epidemiological sources and risk factors for MRSA t4549 remain largely unknown.
Purpose of the Study:
- To generate hypotheses regarding potential risk factors associated with MRSA t4549 infections.
- To compare MRSA t4549 cases with other prevalent MRSA spa types.
Main Methods:
- A nationwide case-case questionnaire study was conducted.
- Data from January 2022 to November 2023 were analyzed using descriptive statistics and logistic regression.
- MRSA t4549 cases were compared against MRSA types t002, t008, t127, t304, and t223.
Main Results:
- MRSA t4549 infections were predominantly observed in males (75%).
- Infections were significantly more common in the foot and toe compared to other MRSA types.
- Identified risk factors included contact with pheasants (OR=8.70), indoor team sports participation (OR=7.54), and swimming (OR=4.15).
Conclusions:
- While case numbers are limited, findings suggest potential associations between MRSA t4549 and specific activities and exposures.
- Preventive measures at individual and sports facility levels are recommended.
- Further environmental and wildlife studies are necessary to understand MRSA t4549 transmission dynamics.
