|
所在平台: Udemy |
课程主页: https://www.udemy.com/course/antibiotic-trouble-shooting-in-disc-diffusion-method/
课程评论：没有评论
课程名称：抗生素在平板扩散法中的故障排除 课程概述：该课程专为医疗、急救和科学领域的专业人士设计，特别是那些积极参与诊断和教学活动的人士。课程详细讲解了在实验室报告前如何进行抗生素的故障排除。平板扩散法（通常称为库尔比-鲍尔测试）用于测量抗生素的有效性，通过观察放置在接种有细菌的琼脂板上的抗生素浸渍片周围的抑菌圈来进行检测。故障排除的主要领域包括： 1. 接种菌密度：不一致或不正确的细菌悬液会导致结果不准确。标准的接种量通常为0.5 McFarland，以确保结果一致。 2. 琼脂厚度和成分：琼脂过厚或过薄会改变抗生素的扩散速率，从而影响抑菌圈的大小。穆勒-希顿琼脂必须保持一致的厚度（4毫米）和pH值（7.2-7.4）。 3. 培养条件：温度（最佳温度为35°C）或气氛（需氧/厌氧）等偏差可影响细菌生长和抗生素的活性。 4. 试片效力：过期或存储不当的抗生素试片可能失去效力，导致抑菌圈变小。 5. 污染：外来微生物会干扰测试，导致错误结果。 正确校准设备、遵循指导方针（如CLSI或EUCAST）和定期进行质量控制检查对于减少平板扩散测试中的故障排除问题至关重要。此课程通过详尽的指导，帮助参与者提高在抗生素敏感性测试中的准确性和可靠性。
This course is designed for medical,paramedic and scientists who actively participate in diagnostic and teaching activities,this course gives detail idea how to trouble shooting of antibiotics before reporting in laboratory.Antibiotic troubleshooting in the disc diffusion method involves identifying and resolving issues that may arise during antimicrobial susceptibility testing. This method, commonly known as the Kirby-Bauer test, measures the effectiveness of antibiotics by observing the inhibition zones around antibiotic-impregnated discs placed on an agar plate inoculated with bacteria.Key troubleshooting areas include:Inoculum density: Inconsistent or incorrect bacterial suspension can lead to inaccurate results. A standard inoculum, typically 0.5 McFarland, ensures uniform results.Agar depth and composition: Too thick or too thin agar can alter the diffusion rate of antibiotics, affecting zone sizes. The Mueller-Hinton agar must be of a consistent depth (4 mm) and pH (7.2-7.4).Incubation conditions: Deviations in temperature (optimal 35°C) or atmosphere (aerobic/anaerobic) can influence bacterial growth and antibiotic activity.Disc potency: Expired or improperly stored antibiotic discs may lose potency, leading to smaller inhibition zones.Contamination: Foreign microbes can interfere with the test, leading to erroneous results.Proper calibration of equipment, adherence to guidelines (e.g., CLSI or EUCAST), and routine quality control checks are essential for minimizing troubleshooting issues in disc diffusion testing.
