, 2001), such as with vaccines against Streptococcus pneumoniae (Arulanandam et al., 2001; Lynch et al., 2003) and S. suis (Li et al., 2007). As indicated from surface antigen one (SAO) protein, it could not GSI-IX in vitro confer satisfactory protection at first but when emulsified with QuiA adjuvant, which could direct the immune type to Th1, it demonstrated high protective efficacy. We suggest that HP0272 may serve

as an effective vaccine with a suitable adjuvant, such as SAO, HP0197 or enolase. The purified recombinant HP0272 was able to migrate beyond 130 kDa by SDS-PAGE while the theoretical molecular weight was 74.3 kDa. The purified protein was confirmed by MS. This phenomenon had been reported before (Gill & Salmond, 1990; Smith et al., 1993; Li et al., 2006), and has been suggested to be due to unusual amino acid composition and post-translational modifications. However, such discrepancy was not observed here, and the reasons remain to be clarified. We have confirmed by quantitative real-time PCR assays that the expression of the HP0272 gene was significantly upregulated in vivo, suggesting that HP0272 might play an important role in the pathogenicity of SS2. Further study on the role of HP0272 in the pathogenesis of S. suis would be beneficial to understanding the function of this category of protein; it was incorrectly annotated as ‘Tif2’ and did not show any significant sequence

homology to any known proteins. In conclusion,

HP0272, the immunogenic surface protein, can elicit a significant humoral antibody response, confers good protection against SS2 infection and could be conserved ABT-263 chemical structure in pathogenic strains. The protein could serve as an effective component of a vaccine against SS2 infection. Further study of the pathogenic role of HP0272 is required, as the function of this category of protein has rarely been documented. This work was supported by the National Natural Science Foundation of China (30871870), 973 programme (2006CB504404), 863 programme (2006AA10A206). We thank Professor Yanxiu Liu for her suggested revisions to the English text. “
“A total of 132 Streptococcus pneumoniae isolates collected between 2005 and 2006 in Japan over were examined for susceptibility to telithromycin (TEL) and macrolide. The overall resistance to macrolide was 80%. Among the isolates, 128 strains had low-level TEL susceptibility (minimal inhibitory concentrations [MICs] 0.03–1 μg mL−1), suggesting that pneumococci with reduced susceptibility to TEL have appeared without prior exposure to the drug, although none of the isolates were assigned as TEL-resistant (breakpoint, ≥4 μg mL−1). Eight of these isolates (MIC 0.5–1 μg mL−1) were analyzed for macrolide resistance determinants and genetic relatedness. They all carried mefE-mel, which encodes the macrolide efflux genetic assembly, and three also harbored ermB, which encodes rRNA methylase.