Today, we will dive into an intriguing yet sometimes overlooked feline health concern – Bartonellosis. In humans, it manifests as cat scratch disease, also known as cat scratch fever. While the disease is typically self-limiting in both cats and humans, a noteworthy fact is that it is carried by approximately 30 to 40% of cats, underscoring the importance of not underestimating its significance.
Bartonellosis is a bacterial infection caused by various species of Bartonella bacteria, with Bartonella henselae being the most common in cats. Transmission occurs primarily through flea bites or scratches from infected cats. Bartonella Hensley is a gram-negative bacterium that infects the erythrocytes of cats. The disease is transmitted by fleas and the flea dirt found on infested cats. While there is no direct transmission between cats, an infected cat can indirectly transmit the disease to humans if they scratch or bite, making it a zoonotic disease.
In otherwise healthy felines, Bartonellosis is usually asymptomatic, but a key indicator of potential risk is the presence of fleas. In immunocompromised cats, Bartonella can lead to bacteremia and systemic disease, resulting in diverse symptoms ranging from mild to severe, including fever, lethargy, swollen lymph nodes, and weight loss. Some cats may develop more severe complications such as heart or eye issues.
Diagnosing Bartonellosis can be challenging due to the variability of symptoms. Commonly used diagnostic tools include blood tests, including PCR and serology, which detect Bartonella DNA or antibodies. While serology helps identify exposure, PCR is more specific for active infection. Culturing Bartonella henselae is possible but challenging, requiring up to 4 to 6 weeks.
The primary treatment for Bartonellosis in cats involves antibiotics such as azithromycin, doxycycline, or erythromycin. Completing the entire antibiotic course is crucial for complete eradication, although many cats may remain carriers for their entire lives. Prevention is key, with regular flea control and indoor living minimizing exposure to fleas. If a cat is diagnosed with Bartonellosis, owners should take precautions to avoid cat bites and scratches, such as keeping their nails trimmed.
Prognosis varies from excellent in asymptomatic cats to fair for those developing bacteremia and secondary issues. In summary, Bartonellosis is a significant concern in the feline world, underscoring the importance of preventive measures, timely diagnosis, and appropriate treatment.