Identify the zoonotic disease:
a. HTLV lymphoma
b. Systemic candidiasis
c. Mucormycosis
d. Plague
e. Endocarditis

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Understand the definition of a zoonotic disease: it is an infectious disease that can be transmitted from animals to humans.

Review each option to determine if it is known to be transmitted from animals to humans.

HTLV lymphoma is caused by the Human T-lymphotropic virus and is not zoonotic; it is transmitted between humans.

Systemic candidiasis and mucormycosis are fungal infections caused by opportunistic fungi and are not typically transmitted from animals to humans.

Plague is caused by the bacterium Yersinia pestis, which is transmitted to humans from infected animals (such as rodents and fleas), making it a zoonotic disease.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Zoonotic Diseases

Zoonotic diseases are infections that are naturally transmitted between animals and humans. These diseases can be caused by bacteria, viruses, fungi, or parasites, and often involve animal reservoirs or vectors. Understanding zoonoses is crucial for identifying diseases that originate from animals.

Plague as a Zoonotic Disease

Plague is a classic example of a zoonotic disease caused by the bacterium Yersinia pestis. It is primarily transmitted to humans through flea bites from infected rodents, making it a key zoonosis. Recognizing plague’s animal origin helps differentiate it from non-zoonotic infections.

Non-Zoonotic Diseases in the List

Diseases like HTLV lymphoma, systemic candidiasis, mucormycosis, and endocarditis are generally not zoonotic. They arise from human-specific pathogens or opportunistic infections without animal reservoirs, which helps exclude them when identifying zoonotic diseases.

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