<I>Streptococcus pneumoniae</I> Growth Based on Drug Resistance Genotype

DOI Web Site 1 Citations 14 References
  • MIYASHITA Katsuhito
    Department of Bacteriology, Kanazawa University Graduate School of Medical Science Division of Environmental Science

Bibliographic Information

Other Title
  • 薬剤耐性遺伝子型別に基づく<I>Streptococcus pneumoniae</I>の増殖能に関する解析
  • 薬剤耐性遺伝子型別に基づくStreptococcus pneumoniaeの増殖能に関する解析
  • ヤクザイ タイセイ イデンシガタベツ ニ モトズク Streptococcus pneumoniae ノ ゾウショクノウ ニ カンスル カイセキ
  • Streptococcus pneumoniae Growth Based on Drug Resistance Genotype

Search this article

Abstract

Marked Streptococcus pneumoniae tolerance is attributed to a penicillin and macrolide resistance genotypes, yet no report has, to our knowledge, compared the ability of these two genotypes to grow. Deviations in the number of clinical appearances of Streptococcus pneumoniae depend on the combination of these genotypes, thought primarily due to the individual strain growth. To test this, we compared ATCC6303 and a strain of each genotype with an absorption spectrophotometer. Time points-TO, T2, T4, T8, T10, T12, and T24-were compared to each of the following factors: initial value, dullness time, doubling time (D.B.T.), peak attainment, peak value, and stationary value. ATCC6303 and the clinical strain (PSSP8) showed no difference in time points or tested factors. Penicillin susceptible Streptcoccus pneumoniae (PSSP) 8 and Penicillin intermediately resistant Streptcoccus pneumoniae (PISP) (2b, mefA) strains showed significant differences in some time points-T8, T10, and T12-and in certain factors-dullness time, D.B.T., and peak attainment.<BR>In penicillin-resistant genotypes, the sequential growth rate priority was PSSP>PISP>PRSP, while in macrolide-resistant genotypes, it was mefA>non-mefA, and non-ermB>ermB. PISP (2x) and PISP (2x+2b, mefA) begin doubling immediately, suggesting that they proliferate earlier than other strains.<BR>Differences in the start of doubling time and doubling speed suggest that different strains are distributed among clinical resistant S. pneumoniae strains.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 82 (4), 292-299, 2008

    The Japanese Association for Infectious Diseases

Citations (1)*help

See more

References(14)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top