Antibiotic resistance happens when bacteria become strong and stop responding to antibiotics. It makes infections harder to treat and more dangerous. Overuse or misuse of antibiotics is the main reason for this problem. class 8 science chapter 3 health the ultimate ...
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Penicillin, the first antibiotic, was discovered by Alexander Fleming in 1928. He saw that a mold killed bacteria in a petri dish. This discovery changed medicine and saved millions of lives worldwide. class 8 science chapter 3 health the ultimate treasure ...
Antibiotics are medicines that kill bacteria causing infections. They don’t work against viruses. Doctors prescribe them for bacterial diseases like pneumonia or tuberculosis. Taking them wrongly can lead to antibiotic resistance, which is dangerous. class 8 science chapter 3 health the ...
Antibiotic resistance spreads when people misuse antibiotics or give them to animals. Resistant bacteria spread through food, water or touch. Infected patients can carry these germs to hospitals, homes and communities. class 8 science chapter 3 health the ultimate treasure question ...
Bacteria become resistant when antibiotics are misused—like taking them without need or not finishing the full dose. Some bacteria survive, change and pass resistance to others, making future infections harder to treat. Class 8 Science Curiosity Textbook Chapter 3 Health – ...