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September 1971

Histidinemia in a Negro Child

Author Affiliations

From the Department of Pediatrics, Sinai Hospital and Department of Pediatrics, University of Maryland School of Medicine (Dr. Kappelman); and the Department of Pediatrics, Johns Hopkins University School of Medicine (Drs. Kappelman, Thomas, and Howell), Baltimore.

Am J Dis Child. 1971;122(3):212-214. doi:10.1001/archpedi.1971.02110030068005

Histidinemia was detected in a Negro girl through a multiple screening process which selected out families having more than one child with learning disorders. Studies of 18 randomly selected asymptomatic Negro children failed to demonstrate a significant racial variation in blood histidine levels; the mean for the group studied was 0.92 mg/100 ml compared to a range of 0.49 to 1.66 mg/100 ml previously recorded among populations of mixed racial origin.