Question

6. Under what conditions—assuming no new epi- demics—could infectious diseases suddenly move to the second, or even first, most common cause of deaths in the United States?

7. Do you think humans will ever win the battle against disease-causing bacteria? Why or why not? Is the use of warlike language to describe the relation- ship between humans and bacteria even accurate?

8. Microbiologists are fond of saying that only a tiny minority of bacteria cause disease. Are there reasons for thinking this might not be true?

9. In what sense are bacteria life givers rather than life takers? Is it possible that disease-causing bacteria might have a beneficial role in another context or even in their relationship with the human body?

10. There are many diseases that manifest in a variety of ways in different, apparently healthy individuals (e.g., a bacterium may cause a mild fever and malaise in one person while causing life-threatening disease in another). What are some of the factors that may contribute to this phenomenon?

Answer 1

6. There is very big importantance of infectious diseases throughout the history , including the plague of Justinian and the black death in the fourteenth century. So there is no doubt in saying that under no new epidemic , infectious disease can move 2nd or even 1st common cause of death in usa. Some conditions regarding to this are given below -

• ​Reemerging infection is most common condition as many infectious diseases in our modern living pushed to the margins but have never been eliminated. So when public health is relaxed or are abandoned , then the forgotten infectious diseases can be seen reappearing
• Complaceny can also be a bigger cause of infectious diseases causing death . The biggest example of this is HIV/AIDS , Which is also a leading cause of death by 1993 in USA .
• Changes in the environment may increase the frequency of contact with natural host carrying an infection.

7. Bacteria are so small in size that more than a million of bacteria could be fit on the head of . So humans can win battle over bacteria many times but can remove them permanently as they are everywhere . So it is very true to say that humans and bacteria have a war like relationship.

8.Some bacteria needs the favourable condition to work , some bacteria are opportunistic pathogens , which means they only become active when opportunity presents itself. These might be some reasons of thinking that microbiologist might not be true.

9. Bacteria can cause many infectious diseases from sore throat to a threatening killing disease , but a bacteria is also responsible for creation of first antibiotic. The bacteria in the body are mostly contained in the skin or mucous membranes, i.e. the digestive, respiratory, and uro-genital tracts. Our intestinal tissue and immune system can not developed without bacteria. Bacteria serve a metabolic purpose for example they break down indigestible food into useful components , that body can absorb.

10.There are variety of diseases which manifiest differently in different individuals . This can be due to genetic or biological factor which diffrent healthy individuals have different immune system to fight against the pathogen . Other factors can be the survival of pathogens in different individuals.