相关实验视频

Updated: Jan 13, 2026

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes

Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes

Published on: February 14, 2025

时间杀死曲线PD建模实验受到尾行MIC终点的影响:对S. pseudintermedius的MIC确定精细化

Andrew Mead¹, Ludovic Pelligand^1,2

¹Comparative Biomedical Sciences, The Royal Veterinary College, London, UK.

Journal of veterinary pharmacology and therapeutics

|October 28, 2025

概括

对抗Staphylococcus pseudintermedius的三甲-硫胺组合的最低抑制度 (MIC) 测试的改进改善了药理动力学 (PD) 研究设计. 这种方法提高了细菌静止剂的准确性,有助于剂量预测并减少临床环境中的错误分类.

科学领域:

微生物学微生物学
药理学药理学是指药理学的学科.
兽医医学兽医医学兽医医学

背景情况:

尾行终点在汁微稀释MIC测试中带来了挑战,特别是对于三甲 (TMP) 和硫胺等细菌静止剂.
准确的MIC确定对于可靠的药理动力学 (PD) 研究设计和翻译应用至关重要.

研究的目的:

应用药理学导向的细化方法来确定TMP-硫胺组合对抗Staphylococcus pseudintermedius的MIC.
改进MIC确定以获得更好的药理动力学 (PD) 研究设计,而不是重新定义临床敏感性.
支持PD建模的优化,为剂量预测提供信息,并减少PD环境中的错误分类.

主要方法:

视觉MIC与从24小时内CFU/mL的log10变化中得出的MIC进行比较.
使用的药学动力学值为+2.3 log10 (可见增长) 和0 log10变化 (静止度).
时间杀死曲线实验是以计数为基础的MIC为主.

主要成果:

视觉MIC经常低估了抑制生长2至4倍所需的度,特别是硫胺.
TMP-硫胺组合 (1:19比) 显示,视觉和计数的MIC之间减少了跟踪和更接近一致.
与视觉MIC相比,基于计数的MIC在时间杀伤曲线中提供了更准确的PD响应.

结论:

药理学指导的MIC精制提高了细菌静止剂和组合的准确性.
这种方法支持PD研究中的度的合理选择,特别是在缓慢作用或比率敏感的组合中.
这种方法对人类和兽医中使用的硫胺类药物具有翻译价值.

关键词:

在 PK/PD 建模中,使用 PK/PD 模型.药理动力学是药理动力学的一个方面.药物动力学药物动力学硫胺是一种硫胺.三甲胺是什么?三甲胺是什么?

更多相关视频

A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii

A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii

Published on: January 2, 2017

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Published on: April 18, 2019

相关概念视频

Nonlinear Pharmacokinetics: Michaelis-Menten Equation

Nonlinear Pharmacokinetics: Michaelis-Menten Equation

The Michaelis–Menten equation is a fundamental model for describing capacity-limited kinetics in drug metabolism. It offers insights into the rate of decline of plasma drug concentration Cp over time, with Vmax and KM as pivotal parameters.
Vmax represents the maximum achievable process rate, while KM, known as the Michaelis constant, signifies the drug concentration at which the process rate reaches half its maximum. This relationship between Vmax, KM, and Cp gives rise to three distinct...

Antimicrobial Effectiveness

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...

Determination of Michaelis Constant and Maximum Elimination Rate

Determination of Michaelis Constant and Maximum Elimination Rate

The Michaelis constant (KM) and the theoretical maximum process rate (Vmax) are vital parameters in the Michaelis-Menten equation, central to many biochemical reactions. They provide essential insights into enzyme kinetics and drug metabolism.
These parameters can be estimated by analyzing plasma concentration data post-drug administration. A notable example of this application is phenytoin, a drug with capacity-limited kinetics. It's recommended that phenytoin should be administered at two...