Prevalence of malnutrition, anemia, and soil-transmitted helminthiasis in preschool-age children living in peri-urban populations in the Peruvian Amazon

Stunting, anemia, and soil-transmitted helminth (STH) infections are major health concerns for children in extremely poor regions of the world, especially rural and periurban ones. This study aimed to determine the prevalence of these three cooccurring conditions in preschool-age children in an extremely poor district on the outskirts of Iquitos, in the Peruvian Amazon, to inform public health actions. Malnutrition was assessed by standard World Health Organization-recommended metrics; anemia, by hemoglobin levels; and STH, by the Kato-Katz technique. Logistic regression analyses were performed to identify the risk factors for our three outcomes of interest. A total of 572 children aged 6-59 months were recruited in March 2019. We found a 31.3% stunting, 47.2% anemia, and 34.1% STH prevalence. Stunting and anemia figures exceeded both regional and national estimates for 2019. Having more children was a risk factor for stunting, whereas married mothers were associated with a lower risk. Risk factors for anemia included younger age and the male sex, whereas those for STH, older age, incomplete vaccination, and a lower socioeconomic status. Mothers’ employment outside the home was also associated with a lower STH risk. This recent evidence highlights the need for prompt and integrated clinical attention and public health actions to address both short- and long-term health consequences in this vulnerable child age group. The integration of a monitoring and evaluation framework is important to effectively manage these conditions, optimize resources and accountability, and show their impact. El retraso en el crecimiento, la anemia y la infección por helmintos transmitidos por el contacto con el suelo (STH) son los principales problemas de salud de la infancia en las regiones del mundo caracterizadas por la extrema pobreza, especialmente en las zonas rurales y periurbanas. Este estudio se llevó a cabo para determinar la prevalencia de estas tres condiciones concurrentes en niños de edad preescolar en un distrito de extrema pobreza en las afueras de Iquitos, en la Amazonía peruana, con el fin último de informar la acción de salud pública. La malnutrición se evaluó mediante las mediciones estándar recomendadas por la Organización Mundial de la Salud (OMS), la anemia mediante los niveles de hemoglobina y la STH mediante la técnica de Kato-Katz. Se realizaron análisis de regresión logística para identificar los factores de riesgo de los tres resultados de interés. Un