Disease Practice Questions

Complete the WHO definition of health.

"Health is a state of complete ........................., ......................... and social well-being and not merely the absence of disease or infirmity."

A student says:

"Ravi has no infections and no illnesses, so he must be healthy."

Explain why the student may be wrong.

State what is meant by a communicable disease.

Put a tick ($\checkmark$) in the correct box for each disease in the table.

State what is meant by a pathogen.

Complete the table to show the type of pathogen that causes each infection.

Name the type of pathogen that Helicobacter is.

Describe how Helicobacter is passed from one person to another.

Suggest one way that a family could reduce the chance of the infection spreading between family members.

Name the type of pathogen that causes malaria and state one effect it has on the body of an infected person.

Describe the role of the mosquito in the transmission of malaria.

Explain how using insecticide-treated bed nets at night reduces the number of cases of malaria in the village.

Describe the main symptom of cholera and explain why this symptom can kill an infected person.

Explain how the cholera bacterium is spread in a camp that has no clean water supply.

Calculate the percentage decrease in the number of new cases of cholera from week 5 to week 7.

.............................................................. %

State the damage caused to the body of a person infected with TB.

Describe how the TB bacterium is passed from an infected person to an uninfected person.

Suggest two ways in which the spread of TB in the hostel could be reduced.

Name the parts of the virus labelled X and Y.

Describe what happens in the lytic pathway after the virus has attached to the bacterium.

Name the type of pathogen that causes Chlamydia.

Describe two ways in which the spread of HIV can be reduced.

Many people infected with Chlamydia have no symptoms. In England, young people are offered a free test for Chlamydia each year.

Explain how this testing programme reduces the spread of Chlamydia.

Calculate the percentage increase in the number of woodland sites with confirmed Chalara ash dieback between 2013 and 2016.

.............................................................. %

Explain how the fungus spreads from an infected woodland to a woodland several kilometres away.

Suggest two measures that could be taken to slow down the spread of Chalara ash dieback.

Using the data in the table and your own knowledge, explain why people infected with HIV are much more likely to develop tuberculosis.

Describe how the Ebola virus is passed from an infected person to another person, and explain why healthcare workers are at a high risk of infection.

Evaluate whether the data show that the measures introduced in week 10 were effective.

Explain, using your knowledge of the lysogenic pathway, why the woman has no symptoms for long periods of time.

Explain why a cold sore appears when she has a heavy cold.