7 Questions
What are pathogens?
Pathogens are infectious agents that cause diseases, and many are micro-organisms like bacteria, protozoa, and fungi.
Are all bacteria pathogens?
No, not all bacteria are pathogens, and they are classified based on shape and cell wall structure.
What is the purpose of Gram staining procedure?
Gram staining procedure is used to differentiate between Gram-positive and Gram-negative bacteria.
How do bacteria cause harm to a host?
Bacteria produce toxins that damage the host cells, and they can cause diseases like ring rot, tuberculosis, and bacterial meningitis.
What are viruses?
Viruses are non-living infectious agents that consist of a short section of DNA or RNA surrounded by a protein coat.
How do viruses infect hosts?
Viruses infect hosts by taking over the host cell metabolism and making new viruses.
What is HIV and what does it lead to?
HIV is a retrovirus that infects T helper cells in the immune system, leading to AIDS.
Study Notes
- Pathogens are infectious agents that cause diseases, and many are micro-organisms like bacteria, protozoa, and fungi.
- Not all bacteria are pathogens, and they are classified based on shape and cell wall structure.
- Gram staining procedure is used to differentiate between Gram-positive and Gram-negative bacteria.
- Bacteria produce toxins that damage the host cells, and they can cause diseases like ring rot, tuberculosis, and bacterial meningitis.
- Viruses are non-living infectious agents that consist of a short section of DNA or RNA surrounded by a protein coat.
- Viruses infect hosts by taking over the host cell metabolism and making new viruses.
- HIV is a retrovirus that infects T helper cells in the immune system, leading to AIDS.
- Influenza is a flu virus that affects mammals and birds, and it can be fatal.
- Tobacco mosaic virus infects tobacco and other species, damaging leaves, flowers, and fruits.
- Anti-retroviral drugs can slow the progress of HIV, but there is no cure for it or tobacco mosaic virus.
Test your knowledge on infectious agents with this quiz! Learn about the different types of pathogens, how bacteria are classified, and the harmful effects they can have on the body. Discover the unique characteristics of viruses, including how they infect hosts and cause diseases like HIV and influenza. Plus, find out about anti-retroviral drugs and their impact on these infections. Take the quiz now to see how much you know about these fascinating and dangerous micro-organisms!
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