Antibiotics act on susceptible bacteria & Resistance and responsible use
Lesson 2 · 5 min
Based on MedlinePlus en español — Bacteria, Infection, and Antibiotic Resistance. Original educational summary, read by a medical doctor and confirmed reliable, pending formal approval. Not medical advice.
Learning objectives
- Explain antibiotics act on susceptible bacteria.
- Explain resistance and responsible use.
Antibiotics act on susceptible bacteria
Antibiotics kill bacteria or stop their growth and multiplication. They do not treat viruses such as those causing colds or influenza. Even some bacterial illnesses improve without antibiotics, so treatment depends on the specific assessment. Fever alone is not a reason to choose an antibiotic. Using one for a viral illness provides no benefit against that virus and introduces avoidable medicine-related risks and pressure favoring resistant organisms.
Resistance and responsible use
Resistance occurs when bacteria change so an antibiotic is less effective against them. It is not a person becoming immune to a medicine. Unnecessary or inappropriate use contributes to the problem. Take antibiotics only when prescribed and follow directions rather than sharing or saving leftovers. Hygiene, food safety, and appropriate vaccination reduce infections and treatment needs. Preventing spread and preserving antibiotic effectiveness are connected public-health goals.
Key concepts
- Not all bacteria cause disease
- Bacteria are tiny single-celled organisms occurring in many environments and on or inside the human body.
- Damage and transmission routes
- Some bacteria multiply rapidly, release toxins, or invade tissues and cause damage.
- Antibiotics act on susceptible bacteria
- Antibiotics kill bacteria or stop their growth and multiplication.
- Resistance and responsible use
- Resistance occurs when bacteria change so an antibiotic is less effective against them.