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. 1991 Jul 15;145(2):123–129.

Increased prevalence of hereditary metabolic diseases among native Indians in Manitoba and northwestern Ontario.

J C Haworth 1, L A Dilling 1, L E Seargeant 1
PMCID: PMC1335598  PMID: 1650287

Abstract

OBJECTIVE: To compare the prevalence of hereditary metabolic diseases in the native and non-native populations of Manitoba and northwestern Ontario. DESIGN: Retrospective analysis. SETTING: Children's Hospital, Winnipeg. PATIENTS: Patients were selected by three methods: laboratory tests designed to screen patients suspected of having a metabolic disease, laboratory investigation of newborn infants with abnormalities detected through screening, and investigation of near relatives of probands with disease. RESULTS: A total of 138 patients with organic acid, amino acid and carbohydrate disorders were seen from 1960 to 1990. Of these, 49 (36%) were native Indians (Algonkian linguistic group). This was in sharp contrast to the proportion of native Indians in the total study population (5.8%). Congenital lactic acidosis due to pyruvate carboxylase deficiency (13 patients), glutaric aciduria type I (14 patients) and primary hyperoxaluria type II (8 patients) were the most common disorders detected. Other rare disorders included glutaric aciduria type II (one patient), 2-hydroxyglutaric aciduria (one patient) and sarcosinemia (one patient). Underreporting, especially of glutaric aciduria type I and hyperoxaluria type II, was likely in the native population. CONCLUSIONS: Hereditary metabolic diseases are greatly overrepresented in the native population of Manitoba and northwestern Ontario. We recommend that native children who present with illnesses involving disturbances of acid-base balance or with neurologic, renal or liver disease of unknown cause by investigated for a possible metabolic disorder.

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Selected References

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