Pathogenic bacteria distribution and drug susceptibility characteristics of the patients with lactation acute mammitis

Abstract

Objective To explore the pathogenic bacteria species of the patients with lactation acute mammitis and their sensitivities to antibiotics in order to provide a guideline in choosing antibiotics reasonably. Methods Four hundred and thirty-three samples from diseased breast（include milk,puncture fluid and secretion in ulcerateing skin）from 310 patients with lactation acute mammitis,who were treated by the center of mammary gland of Maternal and Child Health Care of Haidian district in BeiJing from Jan. to Aug. in 2012. Statistics analysis was made to analysis the pathogenic bacteria species and the characteristics of drug sensitivity. Results （1）Of the 433 samples,407 strains of pathogens were picked out,which consisted of 215 strains of Staphylococcus aureus（SAU）,43 strains of methicillin-resistant staphylococcus aureus（ MRSA）,43 strains of coagulase negative staphylococcus（CNS）,42 strains of Methicillin-resistant staphylococcus epidermis （MRSE）,22 strains of Staphylococcus epidermidis（SE）,12 strains of Methicillin-resistant coagulase negative staphylococci（MRScon）and 8 strains of Alpha hemolytic streptococcus.（2）There were 237 strains of G ＋bacteria,and the drug sensitive test showed that they were all sensitive to vancomycin（100% ）,91. 8% were sensitive to penicillin,57. 0% to clindamycin（ CLDM））and 69. 0% to erythrocin. Meanwhile,94. 0% were sensitive to levofloxacin,70. 0% to cephalosporins,and 80. 0% to gentamicin. In addition,there were 43 MRSA, and drug sensitivity test showed that 95. 0% were sensitive to levofloxacin,96. 0% to gentamicin,97. 0% to macrodantin,and 92. 0% to cotrimoxazole. Meanwhile,it＆#39;s drug resistance rate to erythrocin was 13. 0% and 15. 0% to clindamycin（ CLDM）. MRSA was completely resistant to Lactam antibiotics（ 100% ） such as penicillin and Cephalosporins,95. 0% to levofloxacin,96. 0% to gentamicin,97. 0% to furadantin and 92. 0% to bactrim. Conclusion The predominant pathogenic bacteria of lactation acute mammitis include SAU,MRSA,MRSA,CNS,MRSE,SE and they are all the G ＋ bacteria. They are showed with a high rate of drug resistance, especially for the sensitive drugs which had been proved in the past. Due attention should be paid to germiculture from diseased breast and drug sensitive test as soon as possible,and to provide a guideline in choosing antibiotics reasonably. Key words: Lactation acute mammitis; Pathogenic bacteria; Drug sensitive test; Antibiotics