title: Cat scratch neuroretinitis:  the role of acute and convalescent titers for diagnosis.
abstract: Cat scratch neuroretinitis (CSN) is a clinical diagnosis supported by serological testing. We present 2 cases of CSN in which initial acute titers were negative or equivocal for Bartonella henselae while convalescent titers were shown to be positive. We report these cases to emphasize that a single acute negative titer is insufficient to exclude the diagnosis of CSN and that convalescent titers should be obtained in patients for whom there is a high clinical suspicion of the disease.
authors.affiliation: Department of Ophthalmology, The Methodist Hospital, Houston, TX 77030, USA.
authors.forename: Archit
authors.initials: A
authors.lastname: Gulati
authors.forename: Sushma
authors.initials: S
authors.lastname: Yalamanchili
authors.forename: Karl C
authors.initials: KC
authors.lastname: Golnik
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Lee
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D017963:Azithromycin / Q000627:therapeutic use; D018416:Bartonella henselae / Q000276:immunology; D002372:Cat-Scratch Disease / Q000150:complications*; D002648:Child; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008279:Magnetic Resonance Imaging; D008297:Male; D012173:Retinitis / Q000175:diagnosis / Q000209:etiology / Q000382:microbiology
chemical_list: D000900:Anti-Bacterial Agents; D007074:Immunoglobulin G; D017963:Azithromycin