please;someone kindly assist me these quetsions

CASE STUDY;Healthy humans use all of their brain. There is no part of the brain that goes unused. Certain tasks work certain parts of the brain more, but they all play important roles, as explained by neurobiologistDr. Eric Chudler. Brain maps, as found in modern anatomy books, indicate that each part of the brain has a specific function essential to a healthy human. If there were a part of your brain that really went unused, then you could safely damage that part in an accident with no ill effects. But decades of medical records show that damage to any part of the brain has severe effects. If 90% of the brain were not used, then 90% of the brain tumors would cause no problem. Imagine brain doctors telling 90% of their cancer patients, "I have good news and bad news. Bad news: you have a brain tumor. Good news: it's in the part of the brain that you will never use." The thought is absurd.

SCENARIO;If the 10% myth is instead supposed to mean that humans only use 10% of their brain in a given moment, it is still false. The brain is not a collection of independent machines that are turned on or off depending on whether you are reading or singing. Rather, brain functions emerge as a complex interplay of many parts of the brain. Physiologically, nerves are like muscles in that they degenerate when unused. If 90% of the brain went completely unused, then that portion would degenerate significantly. But brain scans of a healthy person reveals all parts to be intact. This myth was propagated by authors trying to sell books on mystical ways to unlock your hidden potential, claiming that unused brain power could be tapped using the methods in their books. The greatest danger to your brain is not the possibility that a large portion is going on unused. Rather, the greatest dangers are stroke, Alzheimer's disease, and tumors. The best ways to protect yourself from such risks include eating healthy, exercising, and getting enough rest. Do you really want to use your brain to its full potential? Then put down your unlocking-hidden-brain-potential book and go on a run.

QUESTIONS

Question 21

What is the correct method of diagnosis of meningococcal septicaemia: cerebrospinal fluid culture or blood culture?

Question 22

Can Escherichia coli 0157 be spread by foods other than meats?

Question 23

I have a question about a patient with brucellosis in whom, after 6 weeks of treatment with 600 mg rifampicin +200 mg doxycycline, the agglutination test still shows a 1/320 titre. If, after stopping the treatment, the patient begins to experience identical symptoms as previously, how should treatment proceed? What is the best laboratory test to show relapse?

Question 24

Do steroids have a role in the treatment of dengue haemorrhagic fever, in particular to prevent the further fall in the platelet count?

Question 25

Please give me the mechanism of thrombocytopenia in dengue and malaria.

Question 26

What is the recommended procedure for the treatment of a case of dengue fever?

Question 27

What diseases can you get from tick bites?

Question 28

Why has severe acute respiratory syndrome (SARS) not spread as widely as was predicted?

Question 29

Please explain the relation between recurrent typhoid fever and chronic carrier, and the recommended treatment for both.

Question 30 What is the single most confirmatory diagnostic test for typhoid