Journal
INFECTION AND DRUG RESISTANCE
Volume 11, Issue -, Pages 2363-2375Publisher
DOVE MEDICAL PRESS LTD
DOI: 10.2147/IDR.S178584
Keywords
Staphylococcus aureus; methicillin-resistant S. aureus; environment; molecular characterization; antimicrobial susceptibility
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Funding
- National Natural Science Foundation of China [81602901]
- Science and Technology Planning Project of Guangdong province [2014A020212306]
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Background: Methicillin-resistant Staphylococcus aureus (MRSA) causes a wide variety of serious infections worldwide. There are few studies on the prevalence, antimicrobial susceptibility, and molecular characteristics of MRSA contamination in the environment of airports. Materials and methods: A cross-sectional survey was conducted in Guangzhou Haiyun Airport. Environmental surface sampling was conducted in frequently touched locations for S. aureus analysis. All isolates were characterized by multilocus sequence typing (MIST) and tested for antimicrobial susceptibility, resistance genes, and virulence genes. Data were analyzed by chi-squared test and correspondence analysis. Results: Of the 1,054 surface samples, the contamination rate was 7.2% (76/1,054) for S. aureus and 2.2% (23/1,054) for MRSA. There were 62.9% (56/89) S. aureus isolates classified as multidrug resistant (MDR), with six linezolid-resistant isolates and two cfr-carrying isolates. The most prevalent S. aureus genotypes were CC6 (ST6), CC59 (ST59), and CC188 (ST188), with ST59-MRSA-IV (pvl-) as the predominant MRSA. There were significant differences between methicillin-resistant and methicillin-sensitive isolates in rates of resistance to tetracycline (P<0.001) and sek carriage (P=0.029). The correspondence analyses revealed significant corresponding relationships between genotypes and phenotype-genotype characteristics of S. aureus isolates. Conclusion: Our findings revealed a potential risk of cross-transmission of MRSA between human beings and environments, suggesting more stringent contamination control measures. In addition, this study revealed significant corresponding relationships between genotypes and phenotype-genotype characteristics of S. aureus isolates, which may provide new ideas for monitoring the latest epidemiological trends.
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