Callahuaya Indians Indians of South America Medicine Ayllus Religion Callahuaya mythology Callahuaya people Chagas disease Delivery of Health Care Epidemiology Ethnobotany Ethnomédecine Gesundheitswesen Herbal Medicine Housing and health Indigenous mythology Indigenous peoples of South America Materia medica, Vegetable Medical care Medicinal plants Medicine, Traditional Prestation de soins Prevention Public health surveillance Schulmedizin Social aspects Soins médicaux Traditional medicine Volksmedizin