No abstract

Streptococcus suis strains isolated from porcine endocarditis and tonsils in the Tokai area of Japan during 2004-2007 and 2014-2016 (n=114) were tested for antimicrobial susceptibility and distribution of selected resistance genes. No strains showed resistance to penicillin, ampicillin, cefotaxime, meropenem, vancomycin, and levofloxacin. High resistance to tetracycline (80.7%), clindamycin (65.8%), erythromycin (56.1%), and clarithromycin (56.1%) was observed. In chloramphenicol and sulfamethoxazole-trimethoprim, there was a trend towards increased resistance between the first (2004)(2005)(2006)(2007) and second (2014)(2015)(2016) periods. tet(O) and erm(B) genes were the most frequently detected, and tet(M) and mef(A/E) genes were only detected in strains isolated during 2014-2016. These results indicate that chloramphenicol and sulfamethoxazoletrimethoprim resistance, and tet(M) and mef(A/E) genes emerged in S. suis of this area after 2014.

No abstract

No abstract

ilfusashino-shi, mKyO 1g0 *NTT LSI laboratories, Atsugi-shi, KNAGAI{A 248_01 Initial oxidation processes of clean Si(100) surfaces oxidized by super-pure and normal grade oxygen gases are analyzed by synehrotron radiation photoemission spectroscopy to investigate the effect of He0 impurities. A significant difference in initial oxidation features such as oxidation rate and band bending relaxation is found for the two oxygen gases in the sputter-cleaned Si(100)2x1 surface and the Ag-deposited Si(100) surface. The higher oxidation rate and the larger band bending relaxation obtained with the normal grade oxygen can be attributed to molecular HzO impurities.