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Cervical Cat Scratch Disease Lymphadenitis in a Patient with Immunoglobulin M Antibodies to Toxoplasma gondii

Department of Hygiene and Medical Microbiology, Institute for Hygiene, University of Heidelberg, Heidelberg,¹ Departments of Laryngorhinootology,² Pathology,³ Medical Microbiology and Infection Immunology, Free University of Berlin, Berlin, Germany⁴

Received 6 September 2001/ Returned for modification 6 November 2001/ Accepted 6 December 2001

We report on a young patient with chronic cervical lymphadenopathy and serological and histological evidence for infection with Bartonella henselae and Toxoplasma gondii. Serological follow-up studies, including testing for avidity of Toxoplasma-specific immunoglobulin G antibodies, assisted in the determination of the cause of the acute lymphadenitis. Our results suggest that the clinical symptoms were most likely due to cat scratch disease rather than to acute toxoplasmosis.