Methicillin-Resistant Staphylococcus aureus ST398 from human patients, upper Austria.

Area of Science:

• Veterinary Medicine
• Human Infectious Diseases
• Epidemiology

Background:

• Methicillin-resistant Staphylococcus aureus (MRSA) clonal type ST398 is predominantly linked to animal reservoirs.
• The transmission dynamics and human health implications of animal-associated MRSA strains require ongoing investigation.

Purpose of the Study:

• To investigate the prevalence and emergence of MRSA ST398 in human patients in Austria.
• To identify potential risk factors associated with human MRSA ST398 infections.

Main Methods:

• Retrospective analysis of 1,098 confirmed MRSA samples from human patients.
• Epidemiological data collection, including patient occupation and geographical location.
• Trend analysis of MRSA ST398 prevalence over a defined period.

Main Results:

• Twenty-one (1.9%) of 1,098 human MRSA samples were identified as ST398.
• The majority of patients (16/21) with MRSA ST398 were farmers.
• MRSA ST398 prevalence in human patients increased from 1.3% in 2006 to 2.5% in 2008.

Conclusions:

• MRSA ST398 is emerging as a significant pathogen in the human population in Austria.
• Occupational exposure, particularly in farming, appears to be a key risk factor for human MRSA ST398 acquisition.
• Continued surveillance is crucial to monitor the spread of animal-associated MRSA in humans.