Bio Quiz for tomorrow""?

Question

1. what is the definition of epidemiology?
2.what is the different between a virus and bacterium?
3.what is the most common way to fight bacterial infection?
4 what is the most common way to fight viral infection?

Answer 1

1. Epidemiology is the study of factors affecting the health and illness of populations. (From Wikipedia)

2. Virus is much simpler, consisting of a few proteins for a shell and core, and single or double strands of DNA or RNA as a reproductive segment within the core. Virii need other organisms to reproduce, using reproductive processes form a host cell. Bacteria are more complex, larger, have more DNA, have cell membrane, have their own self-contained reproductive system.

3. Bacterial infections are fought with antibiotics.

4. Viral infections are fought with anti-viral medicines, but generally are treated symptomatically, that is, fever is treated with aspirin, acetaminophen etc, and dehydration is treated with fluid replacement. This is because most virus infections are combatted with the body's own immune system. There are some viral diseases which are treated with immunisation, such as measles, mumps, chicken pox, hepatitis, influenza, this allows the body to mount a rapid and more effective response to infection.

Hope this helps.

Answer 2

1- Epidemiology is the study of factors affecting the health and illness of populations.
2- A virus (from the Latin noun virus, meaning toxin or poison) is a microscopic particle (ranging in size from 20 - 300 nm) that can infect the cells of a biological organism. Viruses can replicate themselves only by infecting a host cell. They therefore cannot reproduce on their own, unlike a bacteria , which can reproduce by itself without needing a host cell.


4- Because viruses use the machinery of a host cell to reproduce and also reside within them, they are difficult to eliminate without killing the host cell. The most effective medical approaches to viral diseases so far are vaccinations to provide resistance to infection, and drugs which treat the symptoms of viral infections. Patients often ask for, and physicians often prescribe, antibiotics. These are useless against viruses, and their misuse against viral infections is one of the causes of antibiotic resistance in bacteria