Antibiotic sensitivity
Antibiotic sensitivity or antibiotic susceptibility is the susceptibility of bacteria to antibiotics. Because susceptibility can vary even within a species (with some strains being more resistant than others), antibiotic susceptibility testing (AST) is usually carried out to determine which antibiotic will be most successful in treating a bacterial infection in vivo. Testing for antibiotic sensitivity is often done by the Kirby-Bauer method. Small wafers containing antibiotics are placed onto a plate upon which bacteria are growing. If the bacteria are sensitive to the antibiotic, a clear ring, or zone of inhibition, is seen around the wafer indicating poor growth.
Ideal antibiotic therapy is based on determination of the aetiological agent and its relevant antibiotic sensitivity. Empiric treatment is often started before laboratory microbiological reports are available when treatment should not be delayed due to the seriousness of the disease. The effectiveness of individual antibiotics varies with the location of the infection, the ability of the antibiotic to reach the site of infection, and the ability of the bacteria to resist or inactivate the antibiotic. Some antibiotics actually kill the bacteria (bactericidal), whereas others merely prevent the bacteria from multiplying (bacteriostatic) so that the host's immune system can overcome them. Müeller-Hinton agar is most frequently used in this antibiotic susceptibility test.
An antibiogram is the result of an antibiotic sensitivity test. It is by definition an in vitro sensitivity, but the correlation of in vitro to in vivo sensitivity is often high enough for the test to be clinically useful.
Before starting this treatment, the physician will collect a sample from a suspected contaminated compartment: a blood sample when bacteria possibly have invaded the bloodstream, a sputum sample in the case of a ventilator associated pneumonia, and a urine sample in the case of a urinary tract infection. These samples are transferred to the microbiology lab, which looks at the sample under the microscope, and tries to culture the bacteria. This can help in the diagnosis.
Related Conference of Antibiotic sensitivity
10th International Congress on Trauma, Critical Care and Emergency Medicine
19th International Conference on Virology, Emerging Diseases & vaccines
7th International Conference on Antimicrobial and Antibacterial Agents
7th International Conference on Clinical Microbiology, Virology and Infectious Diseases
Antibiotic sensitivity Conference Speakers
Recommended Sessions
- Bacterial Genomics
- Advances in Antimicrobials, Vaccines and therapeutics
- Alternatives to Antibiotics
- Antibiotic Prophylaxis
- Antibiotic Regulatory Affairs
- Antibiotic Resistance
- Antibiotic sensitivity
- Antibiotics in Chronic Respiratory Diseases
- Antibiotics in Oncology
- Antibiotics in Our Food System
- Antibiotics: Market Analysis & Business Opportunities
- Anticancer Antibiotics
- Bacterial Biochemistry
- Bacterial Clinical Studies
- Bacterial Ecology
- Bacterial Identification Methods
- Bacterial infections
- Bacterial pathogenesis
- Bacterial physiology
- Bacterial Vaccine
- Bacterial vaginosis
- Bacteriology in Public Health
- Bacteriology of dental infections
- Clinical Bacteriology
- Clinical Trials of Antibiotics
- Emerging Infectious Diseases
- Food Poisoning Bacteria
- Medical Bacteriology and Immunology
- Medical Use of Antibiotics
- Microbial Pathogenesis
- MRSA
- Multi Pathogen Infections
- Naturopathy for Bacterial Infections
- Next-Generation Antibiotics
- Pharmacology of antibiotics
- Plant Bacteriology
- Toxicity of antibiotics
- Urinary Tract Infection (UTI)
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