Question

Some human diseases are transmitted only when the blood of a patient comes in close contact with the blood of a healthy person. In one such disease, there is a progressive decrease in the WBC of the patient.

1. Name the disease and its causative agent.
2. Name the type of WBC affected during infection.
3. How does the blood of a patient come in contact with the blood of a healthy patient?
4. Suggest three methods that help in preventing such infection.

Answer 1

1. Disease Name Causative agent: AIDS (Acquired Immuno Deficiency Syndrome).
2. Affected WBC type: Human Immunodeficiency Virus (HIV)
3. Contact of blood: Lymphocytes (T-lymphocytes)
4. Prevention methods: Transfusion of unscreened blood (blood contact).

1. Usage of disposable syringes and needles.
2. Screening of blood before blood transfusion.
3. Avoid sharing shaving blades/razors.