Importance of Antibiotic Sensitivity Testing in Infection Treatment

Antibiotic sensitivity testing is crucial for identifying the most effective antibiotic treatment for bacterial infections. It helps determine the susceptibility of bacteria to antibiotics, guiding clinicians in administering targeted therapy for better outcomes in cases where standard treatments fail or resistance is present. Various testing methods, such as diffusion and dilution, aid in assessing bacterial response to antibiotic agents accurately.

• Antibiotic Sensitivity
• Bacterial Infections
• Resistance Testing
• Treatment Guidance
• Microbiology

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1. ANTIBIOTICS SENSITIVITY TEST BY : Dr. Noor Ali Jabbar

2. Antibiotic sensitivity testing or antibiotic susceptibility testing ; is the measurement of the susceptibility of bacteria to antibiotics. It is used because bacteria may have resistance to some antibiotics. Sensitivity testing results can allow a clinician to change the choice of antibiotics from empiric therapy, which is when an antibiotic is selected based on clinical suspicion about the site of an infection and common causative bacteria, to directed therapy, in which the choice of antibiotic is based on knowledge of the organism and its sensitivities

3. Why do I need an antibiotic sensitivity test? You may need this test if you have an infection that has been shown to have antibiotic resistance or is otherwise hard to treat. These include tuberculosis, MRSA, and C. diff . You may also need this test if you have a bacterial or fungal infection that is not responding to standard treatments.

4. Testing for antibiotic sensitivity 1- Diffusion methods 2- Dilution methods for minimum inhibitory concentration determination ( MIC )

10. Example Bacteria are streaked on dishes with white disks, with a different antibiotic. Clear rings, such as those on the left, show that bacteria have not grown indicating that these bacteria are not resistant. The bacteria on the right are fully resistant to all but two of the seven antibiotics are sensitive