SummaryWe report a case of bilateral multifocal retinochoroiditis and bilateral optic disc edema in a patient with catscratch disease from Bartonella henselae. The patient initially had negative serologic testing. Repeat testing showed a markedly increased IgG and IgM convalescent titer and the development of a branch retinal artery and vein occlusion. In patients for whom there is a high clinical suspicion of cat-scratch disease, a convalescent titer should be obtained 2-3 weeks following a negative initial result.
HistoryA 31-year-old male presented to Stony Brook University with bilateral blurry vision and floaters. The vision loss was of sudden onset, but the patient denied ocular pain. He had a history of flulike illness with malaise, fever, myalgia, and upper respiratory symptoms 1 week earlier.
ExaminationOn examination, best-corrected visual acuity was 20/20 in each eye. Slit-lamp examination was remarkable for 1+ anterior chamber cell in both eyes, 3+ anterior vitreous cell in the right eye and +1 in the left eye. Dilated fundus examination disclosed bilateral disc edema, more prominent on the right more than the left, and multifocal deep retinal and choroidal yellowish infiltrates 100-300 μm in diameter (Figure 1).
Ancillary TestingLaboratory workup for bilateral uveitis and multifocal retinochoroiditis included negative serology for Lyme IgM and IgG; Bartonella IgM and IgG; Epstein-Barr virus; hepatitis A, B, and C; toxoplasma; syphilis; HIV; anti-nuclear antibody; anti-neutrophil cytoplasmic antibody; anti-double stranded DNA; and complement levels. He had a slightly elevated angiotensin converting enzyme (ACE) titer (74 U/L; normal range, 12-68 U/L). Because of his borderline ACE and to rule out sarcoidosis, he underwent chest computed tomography, which did not show any evidence of hilar adenopathy or interstitial lung disease.
TreatmentThe patient was started on 60 mg oral prednisone daily, which was tapered over 1 month. At 1 month after the initial presentation, his visual acuity was 20/20 in each eye. He had mild vitreous cells and mild disc edema bilaterally. In addition, he had developed stellate macular exudates (macular star) in the right eye, retinal vasculitis, and a branch retinal artery and vein occlusion in the left eye (Figure 2). A repeat Bartonella titer was positive at IgG > 1/2560 (negative, <1/320) and IgM 1/200 (negative, <1/100). On further questioning, the patient mentioned he had recently been exposed to a cat. He was started on doxycycline and rifampin. Two months later, his visual acuity remained 20/20, and the disc edema had resolved. The vitritis and macular exudates had cleared completely, but he had developed nasal chorioretinal scars (Figure 3). On his most recent examination, 1 year after initial presentation, his visual acuity