Which of the following diseases is NOT caused by a virus?

Question 148 of 782

Correct Answer: B

The correct option is B. Maize rust. Detailed Explanation:

Understanding the Diseases:
Rinderpest: This is a viral disease that affects cattle and other cloven-hoofed animals. It is caused by the Rinderpest virus, which is a member of the Morbillivirus genus.
Maize rust: This is a fungal disease caused by the fungus Puccinia sorghi. It affects maize (corn) plants and is characterized by the appearance of rust-colored spots on the leaves. Since it is caused by a fungus, it is not a viral disease.
Newcastle disease: This is a viral infection that affects birds, particularly poultry. It is caused by the Newcastle disease virus, which belongs to the Paramyxoviridae family.
Swine fever: Also known as classical swine fever, this disease is caused by the classical swine fever virus (CSFV), which is a member of the Pestivirus genus.
Why Option B is Correct:
Maize rust is caused by a fungus, not a virus. This is the key distinction that makes option B the correct answer. Fungi and viruses are two different types of pathogens, and understanding their differences is crucial in biology.
Why the Other Options are Incorrect:
Option A (Rinderpest): This is a viral disease, so it does not fit the criteria of the question.
Option C (Newcastle disease): This is also a viral disease, specifically affecting birds, and therefore is not the correct answer.
Option D (Swine fever): This is another viral disease, affecting pigs, and thus does not meet the criteria of being a non-viral disease.

Common Pitfalls:

Students may confuse fungal diseases with viral diseases due to the similarities in how they affect plants and animals. It’s important to remember that fungi and viruses are fundamentally different in structure and function.
Misidentifying the causative agents of diseases can lead to incorrect answers. Always check the type of pathogen responsible for the disease.

Revision Summary:

Rinderpest, Newcastle disease, and Swine fever are all caused by viruses.
Maize rust is caused by a fungus, making it the only non-viral disease in the options provided.
Understanding the differences between types of pathogens (viruses vs. fungi) is essential for identifying disease causation.
Always verify the causative agent of a disease when answering questions related to infectious diseases.