Which of the following is classified as a bacterial disease?

Leptospirosis is classified as a bacterial disease because it is caused by the Leptospira bacteria. This condition can affect both animals and humans and is characterized by a wide range of symptoms, including fever, muscle pain, and in severe cases, liver or kidney damage. The bacteria are typically transmitted through contaminated water or soil, and they can thrive in various environments, making leptospirosis a significant concern in veterinary medicine and public health.

In contrast, hepatitis usually refers to liver inflammation which can be caused by various factors including viral infections, while giardiasis is a protozoal infection caused by Giardia parasites. Ringworm, on the other hand, is a fungal infection affecting the skin, hair, or nails, not a bacterial one. Understanding the differences in the categories of infectious agents—bacteria, viruses, protozoa, and fungi—is important in veterinary practice for accurate diagnosis and treatment.