TY - JOUR
T1 - Influence of inoculum size on MICs for methicillin-susceptible Staphylococcus aureus and methicillin-resistant Staphylococcus aureus on in vitro
AU - Miyake, Noriko
AU - Kadowaki, Masako
AU - Sato, Yoriko
AU - Eriguchi, Yoshihiro
AU - Nagasaki, Yoji
AU - Harada, Yukiko
AU - Uchida, Yujiro
AU - Shimono, Nobuyuki
PY - 2011/8
Y1 - 2011/8
N2 - Using 49 clinical methicillin-susceptible Staphylococcus aureus isolates (MSSA) and 54 clinical methicillin-resistant Staphylococcus aureus (MRSA) isolates, we examined the change of MIC using five different inocula (2.5-4×10 2cfu/spot - 2.5-4×10 6cfu/spot). We found the big change of the MIC with the increase of the inoculum size in ampicillin against MSSA, and the change was small in cefazolin, meropenem, ciprofloxacin. For anti-MRSA antibiotics, we found the small change with the increase of the inoculums size in vancomycin and arbekacin, and the middle change in teicoplanin and linezolid against MSSA and MRSA. The data from this study suggest that in serious and high inocula infections caused by S. aureus, the presence of an inoculum effect should be considered in curing.
AB - Using 49 clinical methicillin-susceptible Staphylococcus aureus isolates (MSSA) and 54 clinical methicillin-resistant Staphylococcus aureus (MRSA) isolates, we examined the change of MIC using five different inocula (2.5-4×10 2cfu/spot - 2.5-4×10 6cfu/spot). We found the big change of the MIC with the increase of the inoculum size in ampicillin against MSSA, and the change was small in cefazolin, meropenem, ciprofloxacin. For anti-MRSA antibiotics, we found the small change with the increase of the inoculums size in vancomycin and arbekacin, and the middle change in teicoplanin and linezolid against MSSA and MRSA. The data from this study suggest that in serious and high inocula infections caused by S. aureus, the presence of an inoculum effect should be considered in curing.
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M3 - Article
C2 - 22066347
AN - SCOPUS:80053096278
SN - 0368-2781
VL - 64
SP - 231
EP - 237
JO - Japanese Journal of Antibiotics
JF - Japanese Journal of Antibiotics
IS - 4
ER -
