[Bartonella neuroretinitis : An atypical manifestation of cat scratch disease]

Cat scratch disease (CSD) typically manifests as a febrile lymphadenopathy and is caused by a Bartonella henselae infection after contact with cats. This article describes the case of an atypical presentation of CSD in a 52-year-old patient with acute unilateral loss of vision and headache without fever or lymphadenopathy. Funduscopic examination showed an optic disc swelling and macular star exsudates, pathognomonic for infectious neuroretinitis. A Bartonella henselae infection was confirmed serologically. Systemic antibiotic combination therapy was initiated with doxycycline and rifampicin for 6 weeks resulting in good morphological and functional results. A Bartonella neuroretinitis should be considered in the differential diagnosis of patients with loss of vision and papilledema, even in the absence of fever or lymphadenopathy. Immediate serological testing and initiation of antibiotics are important for the outcome.