Study on clindamycin resistance and molecular epidemiology of bloodstream infection by Staphylococcus aureus / 国际检验医学杂志

ABSTRACT

Objective To understand the clindamycin resistance gene and molecular epidemic of Staphylococcus aureus in the pa‐tients with bloodstream infection in our hospital during 2014 .Methods The clinical isolates of Staphylococcus aureus in clinical bloodstream infection were collected during 2014 .The phenotype of erythromycin to clindamycin induced resistance was assessed by D test .The erm gene was detected by PCR .The different erm types of the molecular epidemiology of Staphylococcus aureus were studied by spa and MLST typing .Results In 33 strains of Staphylococcus aureus ,the isolation rate of MRSA strains were 78 .79% ,moreover all of MRSA strains carried ermA gene .In 7 strains of methicillin sensitive Staphylococcus aureus(MSSA) ,4 strains respectively carried ermB or ermC gene .The results of MLST and spa results showed that the main type of MRSA in our hospital was ST239‐t030 .But MSSA had more types ,such as ST59‐t437 ,ST398‐t3625 and so on .Conclusion MRSA has higher i‐solation rate in our hospital ,which is dominated by ST239‐t030 type .For the detection of gene erm ,ermA (86 .67% ) is the main type .The strains are obviously resistant to antibacterial drugs .The laboratory should strengthen the detection of clindamycin in‐duced resistance for guiding the clinical rational use of antibacterial drugs .