Which of the following is not an infectious disease?

The correct answer is Alzheimer's

Concept:

• Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites, or fungi. These diseases can spread, directly or indirectly, from one person to another.
• Non-infectious diseases, on the other hand, are not caused by infectious agents. They can be due to genetic factors, lifestyle choices, or environmental exposures.

Explanation:

• Cholera: Cholera is an infectious disease caused by the bacterium Vibrio cholerae. It is typically spread through contaminated water and causes severe diarrhea and dehydration.
• Chickenpox: Chickenpox is an infectious disease caused by the varicella-zoster virus. It is highly contagious and spreads through direct contact with an infected person or through the air by respiratory droplets.
• Malaria: Malaria is an infectious disease caused by Plasmodium parasites, which are transmitted to humans through the bites of infected Anopheles mosquitoes. It causes fever, chills, and flu-like symptoms.
• Alzheimer's: Alzheimer's disease is a non-infectious disease. It is a neurodegenerative disorder characterized by progressive cognitive decline, memory loss, and changes in behavior and personality.