13.3.1 Prevention and Treatment of Diseases Caused by Harmful Microorganisms (Q&A)

Short Answer Questions

1. What are pathogens?
   Answer
   Pathogens are microorganisms that can cause diseases.
2. What are aseptic techniques?
   Answer
   Aseptic techniques are practices used to maintain an environment free from pathogens and prevent contamination.
3. Name one setting where aseptic techniques are crucial.
   Answer
   Medical, laboratory, or food preparation environments.
4. What is sterilization?
   Answer
   Sterilization involves using physical or chemical methods to kill all microorganisms.
5. Name three methods of sterilization.
   Answer
   Heat (autoclaves), radiation (UV, X-rays, gamma rays), and chemicals.
6. How do autoclaves sterilize equipment?
   Answer
   They use high-pressure steam at 121°C to kill microorganisms.
7. What are disinfectants?
   Answer
   Disinfectants are chemical agents used to kill microorganisms on non-living surfaces.
8. Give two examples of disinfectants.
   Answer
   Chlorine and hydrogen peroxide.
9. How are antiseptics different from disinfectants?
   Answer
   Antiseptics are used on living tissue, while disinfectants are used on non-living surfaces.
10. Name two examples of antiseptics.
    Answer
    Iodine solution and potassium permanganate (VII).
11. What are antibiotics?
    Answer
    Antibiotics are medications used to kill or inhibit the growth of bacteria.
12. Name two antibiotics and the diseases they treat.
    Answer
    Penicillin (pneumonia) and tetracycline (cholera).
13. What are antifungals used for?
    Answer
    Antifungals treat fungal infections.
14. Name an example of an antifungal medication.
    Answer
    Clotrimazole.
15. What are antivirals?
    Answer
    Antivirals are medications used to treat viral infections.
16. Name two diseases that can be treated with antivirals.
    Answer
    Influenza and hepatitis.
17. How do vaccines work?
    Answer
    Vaccines contain weakened or dead pathogens that stimulate the body to produce antibodies.
18. Name two vaccine-preventable diseases.
    Answer
    Polio and tuberculosis.
19. What is antibiotic resistance?
    Answer
    Antibiotic resistance occurs when bacteria evolve to withstand the effects of antibiotics.
20. Why is it important to complete a full course of antibiotics?
    Answer
    To prevent the development of antibiotic-resistant bacteria.

Explanation Questions

1. How do aseptic techniques help in disease prevention?
   Answer
   Aseptic techniques prevent the contamination of sterile environments, reducing the risk of spreading infections in medical, laboratory, and food preparation settings.
2. Why is sterilization necessary in medical and laboratory environments?
   Answer
   Sterilization eliminates all microorganisms, including pathogens, ensuring that equipment and surfaces do not cause infections.
3. How does UV radiation help in sterilization?
   Answer
   UV radiation destroys microorganisms by damaging their DNA, effectively eliminating up to 99% of pathogens in the air and on surfaces.
4. What is the difference between antibiotics, antifungals, and antivirals?
   Answer
   Antibiotics target bacteria, antifungals treat fungal infections, and antivirals combat viral infections. Each type of medication is designed to target a specific kind of pathogen.
5. Why are vaccines important in disease prevention?
   Answer
   Vaccines stimulate the immune system to produce antibodies, providing long-term protection against specific diseases.
6. How does antibiotic resistance develop?
   Answer
   Overuse and misuse of antibiotics allow bacteria to adapt and evolve, making them resistant to treatment, leading to harder-to-treat infections.
7. Why is it important to use antiseptics on wounds?
   Answer
   Antiseptics kill or inhibit the growth of microorganisms on living tissue, preventing infections from cuts and wounds.
8. How does the experiment on hand cleanliness demonstrate the importance of hygiene?
   Answer
   By comparing bacterial growth on agar plates from unwashed and washed hands, the experiment shows how proper handwashing reduces microbial contamination.
9. What is the purpose of testing different concentrations of antibiotics on bacterial growth?
   Answer
   The experiment helps determine the most effective antibiotic concentration for killing bacteria, guiding proper dosage in medical treatments.
10. How does temperature affect microbial growth in experiments?
    Answer
    Different temperatures affect microbial metabolism; most bacteria thrive at optimal temperatures, while extreme temperatures inhibit or kill them.