Which one of the following is not a disease caused by virus?

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Q: 3 (IES/2015)

Which one of the following is not a disease caused by virus?

question_subject: 

Science

question_exam: 

IES

stats: 

0,132,99,16,30,132,53

keywords: 

{'cholera': [3, 1, 1, 4], 'disease': [4, 2, 0, 0], 'dengue': [0, 0, 2, 1], 'virus': [4, 0, 0, 1], 'flu': [1, 0, 0, 1], 'chicken pox': [1, 0, 0, 0], 'bird': [0, 0, 0, 1]}

Option 1: Bird-flu: Bird flu, also known as avian influenza, is indeed a disease caused by a virus. It primarily affects birds but can also be transmitted to humans.

Option 2: Chicken pox: Chicken pox is caused by the varicella-zoster virus. It is highly contagious and primarily affects children. However, it can also affect adults who have not been previously exposed to the virus.

Option 3: Cholera: Cholera is not caused by a virus, but rather by the bacterium Vibrio cholerae. It is an infectious disease that leads to severe diarrhea and dehydration.

Option 4: Dengue: Dengue is caused by the dengue virus, which is transmitted through the bite of infected mosquitoes. It is a tropical disease that can result in severe flu-like symptoms and, in some cases, can be life-threatening.

Based on the options provided, option 3, cholera, is not a disease caused by a virus. It is caused by the bacterium Vibrio cholerae. Therefore, the correct answer is option 3.