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Introduction: Nutritional status has been implicated in the modulation of the immune response, possibly augmenting the pathogenesis of Chagas disease (Cd). We evaluated diet quality and nutritional status in adults and elderly patients with chronic Cd in a tertiary hospital. Methods: A case-control study of Cd patients was conducted, paired for gender, age, and co-morbidities with non-Cd patients. Anthropometric measurements and food frequency questionnaire was used, and diet quality was assessed by the Brazilian Healthy Eating Index-Revised (BHEI-R). The Estimated Average Requirement cut-off points were used to determine the dietary micronutrient adequacy. The Cd group was further grouped according to Los Andes classification. Results: The study participants were 67 ± 10 years old, 73.6% elderly and 63% female. The prevalence of overweight/obesity and abdominal fat was high in both groups; however, Cd group showed a lower prevalence of obesity and increased risk of disease according to waist circumference classification. There was no difference in BHEI-R score between groups (p=0.145). The Cd group had sodium and saturated fat intake above recommendations and low intake of unsaturated fat, vitamin D, E, selenium, magnesium, and dairy products; but higher intake of iron. According to Los Andes classification, group III presented lower intake of whole fruit and dietary fiber. Conclusions: Patients with Cd were overweight and the quality of their diet was unsatisfactory based on the recommended diet components for age and sex.

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