What organism is associated with cat scratch disease?

Bartonella henselae is the organism associated with cat scratch disease, an infection that typically occurs after a cat scratch or bite. This bacterium is a gram-negative aerobic bacillus that can reside in the blood of infected cats without causing symptoms in them.

The route of transmission to humans is primarily through scratches or bites from an infected cat, and sometimes through flea bites, which can transmit the bacteria from cats to humans. The infection can lead to symptoms such as fever, swollen lymph nodes, and other systemic signs.

Recognizing Bartonella henselae as the causative agent is critical in clinical practice, as it helps guide the diagnosis and management of patients presenting with signs consistent with cat scratch disease. Understanding the nature of Bartonella henselae and its transmission can facilitate preventive measures in individuals at risk, particularly those who handle cats frequently.