Question 48

Virus is responsible for the common cold.

The common cold is primarily caused by a virus, specifically rhinoviruses, which are the most prevalent pathogens associated with this illness. Viruses are known for their ability to spread easily among individuals, leading to widespread outbreaks of the common cold.

A) Bacterium

Bacteria are single-celled organisms that can cause various infections, but they are not responsible for the common cold. This illness is viral in nature, and while bacterial infections may occur concurrently, they do not cause the cold itself.

B) Virus

Viruses are the correct type of pathogen responsible for the common cold. They invade the upper respiratory tract and replicate, leading to the symptoms associated with the cold, such as a runny nose and sore throat. This classification aligns with the prevalent understanding of colds in medical literature.

C) Fungus

Fungi are organisms that can cause infections, but they are not linked to the common cold. Fungal infections typically affect different areas of the body and involve a different set of symptoms and mechanisms than those seen with viral infections like the cold.

D) Protozoan

Protozoa are single-celled eukaryotic organisms that can cause diseases, but they are not implicated in the common cold. The nature of the common cold is distinctly viral, and protozoan infections are unrelated to the symptoms experienced during a cold.

Conclusion

The correct answer is that a virus is responsible for the common cold, as it directly correlates with the symptoms and spread of the illness. All other options—bacteria, fungi, and protozoa—are not responsible for causing the common cold, highlighting the importance of understanding the specific pathogens associated with various illnesses.