Which of the following diseases is caused by a virus?

Myxomatosis is caused by the Myxoma virus, which specifically affects rabbits. This viral disease is known for causing severe swelling and lesions in the face and genital areas, leading to high mortality rates in affected populations. Understanding that myxomatosis is virally induced helps differentiate it from other conditions that may affect rabbits but are caused by different types of pathogens or organisms.

In contrast, coccidiosis is caused by protozoan parasites, ear mites are ectoparasites that infest the skin, and respiratory infections can be caused by a variety of bacterial or viral agents, though not specifically identified as a viral disease in this context. Knowing these distinctions is important for effective diagnosis and treatment of rabbit health issues.