Related factors to non-adherence to antiretroviral therapy in HIV/AIDS patients.

OBJECTIVE: To identify sociodemographic, clinical, and pharmacological factors  associated with nonadherence to antiretroviral treatment in patients with  human immunodeficiency virus/acquired immunodeficiency syndrome treated  between 2017 and 2020 in four cities in Colombia. METHOD: An observational, cross-sectional, retrospective study was conducted of a population of patients with human immunodeficiency virus/acquired immunodeficiency syndrome treated between 2017 and 2020. The Morisky-Green scale, the simplified medication adherence  questionnaire, and the simplified scale to detect adherence problems to  antiretroviral treatment were applied to determine patient adherence. A  binomial multiple logistic regression was performed to evaluate the factors that  best explain nonadherence. RESULTS: A total of 9,835 patients were evaluated, of whom 74.4% were men,  71.1% were aged between 18 and 44 years, 76.0% had attended at most  secondary school, 78.1% were single, and 97.6% resided in an urban area.  After applying three different scales to each patient, 10% of the study  population were identified as nonadherent to treatment. The risk of  nonadherence was significantly higher in patients who presented any drug- related problem or had an adverse reaction to antiretroviral drugs. CONCLUSIONS: The variables most strongly associated with nonadherence to  antiretroviral treatment were drug-related problems, adverse drug reactions, a  history of nonadherence to treatment, and psychoactive substance use.

OBJETIVO: Identificar los factores sociodemográficos, clínicos y farmacológicos asociados a la no adherencia al tratamiento antirretroviral en pacientes con infección por virus de la inmunodeficiencia humana/sida atendidos entre 2017 y 2020 en diferentes ciudades de Colombia.Método: Se realizó un estudio observacional, de corte transversal y retrospectivo, con una población de pacientes con infección por virus de la  inmunodeficiencia humana/sida atendidos entre 2017 a 2020. Se aplicaron las  escalas Morisky-Green, el cuestionario simplificado de adherencia a la  medicación y la escala simplificada para detectar problemas de adherencia al  tratamiento antirretroviral, para determinar la adherencia de los pacientes. Se  realizó una regresión logística múltiple para evaluar los factores que mejor  explican la no adherencia. RESULTADOS: Se evaluaron 9.835 pacientes, de los cuales el 74,4% eran hombres, el 71,1% tenían una edad entre 18 a 44 años, el 76,0% cursó como máximo hasta secundaria, el 78,1% eran solteros y el 97,6%  residían en zona urbana. Se encontró una proporción de no adherencia al  tratamiento del 10% después de aplicar tres escalas diferentes a cada paciente. Las personas que presentaron algún problema relacionado con los medicamentos tuvieron un riesgo significativamente mayor de no ser adherentes, al igual que aquellos que tuvieron alguna reacción adversa a los medicamentos antirretrovirales. CONCLUSIONES: Los problemas relacionados con el uso de medicamentos, las  reacciones adversas a medicamentos, los antecedentes de no adherencia al  tratamiento y el consumo de sustancias psicoactivas fueron las variables que  más se asociaron con la no adherencia al tratamiento antirretroviral.

Factores relacionados con la no adherencia a la terapia antirretroviral en pacientes con VIH/sida / Related factors to non-adherence to antiretroviral therapy in HIV/AIDS patients

Objetivo: Identificar los factores sociodemográficos, clínicos y farmacológicos asociados a la no adherencia al tratamiento antirretroviral enpacientes con infección por virus de la inmunodeficiencia humana/sidaatendidos entre 2017 y 2020 en diferentes ciudades de Colombia.Método: Se realizó un estudio observacional, de corte transversal yretrospectivo, con una población de pacientes con infección por virusde la inmunodeficiencia humana/sida atendidos entre 2017 a 2020.Se aplicaron las escalas Morisky-Green, el cuestionario simplificado deadherencia a la medicación y la escala simplificada para detectar problemas de adherencia al tratamiento antirretroviral, para determinar laadherencia de los pacientes. Se realizó una regresión logística múltiplepara evaluar los factores que mejor explican la no adherencia.Resultados: Se evaluaron 9.835 pacientes, de los cuales el 74,4% eranhombres, el 71,1% tenían una edad entre 18 a 44 años, el 76,0% cursócomo máximo hasta secundaria, el 78,1% eran solteros y el 97,6% residían en zona urbana. Se encontró una proporción de no adherencia altratamiento del 10% después de aplicar tres escalas diferentes a cadapaciente. Las personas que presentaron algún problema relacionado conlos medicamentos tuvieron un riesgo significativamente mayor de no seradherentes, al igual que aquellos que tuvieron alguna reacción adversa alos medicamentos antirretrovirales. (AU)

Objective: To identify sociodemographic, clinical, and pharmacological factors associated with nonadherence to antiretroviral treatment inpatients with human immunodeficiency virus/acquired immunodeficiencysyndrome treated between 2017 and 2020 in four cities in Colombia.Method: An observational, cross-sectional, retrospective study was conducted of a population of patients with human immunodeficiency virus/acquired immunodeficiency syndrome treated between 2017 and 2020.The Morisky-Green scale, the simplified medication adherence questionnaire, and the simplified scale to detect adherence problems to antiretroviral treatment were applied to determine patient adherence. A binomialmultiple logistic regression was performed to evaluate the factors that bestexplain nonadherence.Results: A total of 9,835 patients were evaluated, of whom 74.4%were men, 71.1% were aged between 18 and 44 years, 76.0% hadattended at most secondary school, 78.1% were single, and 97.6% resided in an urban area. After applying three different scales to eachpatient, 10% of the study population were identified as nonadherent totreatment. The risk of nonadherence was significantly higher in patientswho presented any drug-related problem or had an adverse reaction toantiretroviral drugs. (AU)

Cryptococcus neoformans- and Cryptococcus gattii-specific IgG, IgA and IgM differ among children and adults with and without cryptococcosis from Colombia.

Cryptococcus neoformans (Cn) and Cryptococcus gattii (Cg) cause cryptococcosis, a life-threatening systemic mycosis of global distribution affecting mainly immunocompromised adults. Although a humoral response occurs during cryptococcosis, the role of antibody production against this mycosis is not fully understood. We aimed to determine total and specific antibodies against cryptococcal protein antigens in sera from people with and without a diagnosis of cryptococcosis from Colombia. Using ELISA, total and specific levels of immunoglobulin (Ig)G, IgA and IgM were determined in sera from children and adults with (n = 109) and without (n = 119) cryptococcosis. Specific antibodies were those binding Cn- and Cg-protein antigens. In general, the mean of the total IgG production was higher in cryptococcosis patients than in controls (13 942.32 vs. 6459.91 µg/ml), while levels of IgA (488.13 vs. 1564.53 µg/ml) and IgM (775.69 vs. 1014.72 µg/ml) were higher in controls than in cryptococcosis patients (P ≤ .05). In patients with cryptococcosis, total IgG, IgA and IgM levels were higher in HIV + compared with HIV- (P ≤ .05). Specific antibodies tended to be higher in cryptococcosis patients than in controls and in adults than in children, with a positive correlation between antibody reactivity and age. All immunoglobulins were more reactive against Cn-proteins than Cg-proteins. Overall, a positive weak correlation between total and specific antibodies was found, although not always statistically significant. In patients with cryptococcosis from Colombia, the levels of immunoglobulins, total and specific, differ with respect to people without cryptococcosis. Variations in antibody production among adults and children with cryptococcosis and between Cn- and Cg-protein antigens were as well established. Our findings encourage further studies to determine the role of humoral immunity for host defense against cryptococcosis.

Differential IgG, IgA, and IgM production and their reactivity with cryptococcal proteins, both among children and adults with and without a diagnosis of cryptococcosis from Colombia, lead to reappraise the study of the potential role of antibody production as host defense against this fungal infection.

Risk factors and spatial analysis for domiciliary infestation with the Chagas disease vector Triatoma venosa in Colombia.

Background: In Colombia, communities living in the Andean region are the most affected by Chagas disease due to the presence of the main vectors, the environmental and risk factors associated with house infestation. Triatoma venosa is classified as a secondary vector that is frequently found in the departments of Boyaca and Cundinamarca, but epidemiological information and its association with risk factors in domestic and peridomestic areas is unknown. The study aimed to evaluate housing and environmental characteristics associated with domestic and peridomestic infestation by T. venosa and a risk map was estimated. Methods: A cross-sectional study was conducted in municipalities of Boyaca and Cundinamarca, Colombia. From March to July 2015, triatomine infestation screening surveys were conducted in 155 households. Multivariate analysis was performed to evaluate associations with the infestation and ecological niche modeling was estimated using environmental variables. Results: No statistical association was found with any of the housing variables in the adjusted multivariate analysis. However, in raw relationship infestation was associated with bushes < 10 m (OR = 3; 95% CI: 1.3-7.3) and higher temperature p value < 0.05. The developed final risk map pointed to 12 municipalities with no previous report of the disease, which should be sampled for the presence of T. venosa. Conclusion: This study highlights the relationship between environmental factors and T. venosa in Colombia and the importance of modeling tools to improve mapping efforts. Additional studies are needed to verify the association with bushes and higher temperatures and to verify infestation in predicted risk area with no previous report of the species.

Desnutrición crónica en niños menores de cinco años de la comunidad indígena awá, Barbacoas (Nariño, Colombia), 2019 / Chronic Malnutrition in Children under 5 Years Old in the Awá Indigenous Community, Barbacoas (Nariño ­ Colombia) in 2019 / Desnutrição crônica em crianças menores de cinco anos da comunidade indígena Awá, Barbacoas (Nariño, Colombia), 2019

Introducción: la desnutrición crónica en menores de 5 años se define como el retraso en el crecimiento, resultado de recurrentes carencias nutricionales, asociadas con pobreza, de salud y nutrición materna. El objetivo fue identificar la prevalencia de desnutrición crónica y factores asociados en menores de 5 años de la comunidad indígena awá, atendidos en la ips Unidad del Pueblo Indígena Awá (unipa) de Barbacoas (Nariño, Colombia) durante 2019. Materiales y métodos: estudio de corte transversal con enfoque analítico. Se incluyeron 527 niños menores de 5 años de la comunidad awá acudientes al programa de crecimiento y desarrollo de la ipsunipa. Se evaluó como desenlace la desnutrición crónica y, como factores asociados, características sociodemográficas, nutricionales y otras del estado de salud. Se consideró un valor de p menor al 5 % cuando se utilizó chi cuadrado, test exacto de Fisher y U de Mann-Whitney para determinar asociación estadística; además, se ajustó la relación a través de un modelo de regresión logística múltiple. Resultados: el 17.6 % de los niños pre-sentó desnutrición crónica. Se encontró asociación estadística con ser hijo de madre adolescente (p = 0.006), esquema de vacunación incompleto (p = 0.012), la edad (p = 0.017) y el peso al nacer (p = 0.017). Conclusión: en menores de 5 años de la comunidad awála frecuencia de desnutrición crónica está por encima de la media para esta población en general en Colombia. Es importante priorizar la búsqueda activa de desnutrición crónica en niños cuyas madres son adolescentes, niños con bajo peso al nacer y vacunación incompleta

Introduction: Chronic malnutrition in children under 5 years old is defined as stunting due to recurrent nutritional deficiencies associated with poverty, maternal health, and nutrition. This study aimed to iden-tify the prevalence of chronic malnutrition and associated factors in children under 5 years old from the indigenous Awá community, at Barbacoas, Nariño in 2019. Materials and methods: A cross-sectional study was conducted, which included 527 children under 5 years old from the Awá community who attended a health institution for growth and development program. Chronic malnutrition was evaluated as an outcome, whereas sociodemographic, nutritional and other health characteristics as associated factors. Chi-square, Fisher's exact, and Mann­Whitney's U test were used to determine statistical association. Additionally, the relationship was adjusted through a multiple logistic regression model. Results: Chronic malnutrition was found in 17.6% of children. The statistical association was found in children of the ado-lescent mother, incomplete vaccination schedule, and age and birth weight. Conclusion: In children under 5 years old in the Awá community, the frequency of chronic malnutrition is above the average for the general population in Colombia. Prioritizing the active search for chronic malnutrition in children whose mothers are adolescents and those with low birth weight and incomplete vaccination is important

Introdução: a desnutrição crônica em crianças menores de cinco anos é definida como retardo de crescimento como resultado de deficiências nutricionais recorrentes associadas à pobreza, saúde materna e nutrição. O objetivo é identificar a prevalência de desnutrição crônica e fatores associados em crianças menores de 5 anos da comunidade indígena Awá, atendidas na Unidade ips do Povo Indígena Awá (unipa) de Barbacoas, Nariño durante 2019. Materiais e métodos: estudo transversal de abordagem analítica. Foram incluídas 527 crianças menores de 5 anos da comunidade Awá que participaram do programa de crescimento e desen-volvimento da ipsunipa. A desnutrição crônica foi avaliada como desfecho e as características sociodemo-gráficas, nutricionais e outras características de saúde como fatores associados. Um valor de p inferior a 5% foi considerado quando o qui-quadrado, o teste exato de Fisher e o U de Mann Whitney foram usados para determinar a associação estatística, além disso, a relação foi ajustada por meio de um modelo de regressão logística múltipla. Resultados: 17,6% das crianças apresentavam desnutrição crônica. Associação estatística foi encontrada com os fatores ser filho de mãe adolescente (valor p: 0,006), esquema vacinal incompleto (valor p: 0,012), idade (valor p: 0,017) e peso ao nascer (valor p: 0,017). Conclusão: em crianças menores de 5 anos da comunidade Awá, a frequência de desnutrição crônica está acima da média geral para esta popu-lação na Colômbia. É importante priorizar a busca ativa da desnutrição crônica em crianças cujas mães são adolescentes, em crianças com baixo peso ao nascer e com esquema de vacinação incompleto

Factores maternos asociados al peso del recién nacido en una IPS de Medellín, Colombia, 2018 / Maternal Factors Associated with Newborn Weight in a IPS in Medellin, Colombia, 2018

Resumen Antecedentes: la variabilidad en el peso del recién nacido, ya sea como bajo peso o macrosomía, puede ocasionar morbimortalidad infantil y materna, además de ser un predictor del estado de salud a lo largo de la vida. Objetivo: determinar factores sociodemográficos, antecedentes patológicos, exposición a sustancias psicoactivas, actividad física y características alimentarias de la madre relacionados con el peso de recién nacidos en una IPS de Medellín, Colombia, en 2018. Materiales y métodos: estudio de cohorte con información de madres seguidas hasta el nacimiento de los bebés. Resultados: la edad promedio de las madres fue de 24±6 años, el peso promedio del recién nacido fue de 3150 g. Embarazo previo, consumo de lácteos y derivados, consumo de proteínas y de suplementos dietarios fueron factores presentes en madres de recién nacidos con mayor peso. Haber fumado alguna vez en la vida, antecedente de preeclampsia, parto previo, aborto en el último embarazo y consumo de alimentos ultraprocesados se presentaron en madres de recién nacidos con menor peso. Conclusiones: se recomienda a las gestantes limitar el consumo de alimentos ultraprocesados, supervisar el consumo de lácteos y derivados, proteínas y suplementos dietarios en madres con embarazos previos, antecedente de preeclampsia, abortos o hábitos como haber fumado.

Abstract Background: The variability in newborn birthweight, whether low birth weight or macrosomia, can contribute to maternal and infant morbidity and mortality as well as be a predictor of lifelong health. Objective: Determine socio-demographic factors, pathologic history, exposure to psychoactive substances, physical activity levels, and maternal diet as related to birth weight in newborns an in IPS in Medellin, Colombia 2018. Materials and Methods: Cohort study using maternal information obtained from following a sample of mothers of newborns until their infant's birth. Results: Average age of the mothers was 24±6 years and average newborn birthweight was 3150g. Previous pregnancies, consumption of dairy products, intake of protein, and use of dietary supplements were factors present in mothers of newborns with higher birthweight. Having ever smoked, history of preeclampsia, previous delivery, abortion in previous pregnancy, and intake of ultra-high processed foods (UHPF) were factors found among mothers whose infants had lower birthweight. Conclusions: It is recommended that pregnant women limit intake of highly processed foods, supervise their intake of dairy products, protein and dietary supplements in women who have had previous pregnancies, history of preeclampsia, abortions, or who have ever smoked.

Factores demográficos y clínicos que explican la progresión de la Enfermedad Renal Crónica en un programa de nefroprotección del departamento de Nariño, Colombia 2016-2018 / Demographic and clinical factors that explain the progression of Chronic Kidney Disease in a nephroprotection program in the department of Nariño, Colombia between 2016-2018

Resumen Introducción: La Enfermedad Renal Crónica es una patología de gran impacto en salud pública a nivel mundial, su progresión está determinada por limitaciones en el control de sus factores de riesgo y pronóstico. Los programas de nefroprotección hacen seguimiento y control de los pacientes con la enfermedad, intentando llevarlos a cumplir las metas específicas de nefroprotección para limitar la progresión de la Enfermedad Renal Crónica. Objetivo: Determinar los factores explicativos de la progresión de la Enfermedad Renal Crónica en pacientes atendidos en un programa de nefroprotección. Materiales y métodos: Estudio analítico observacional de cohorte retrospectivo en 5872 pacientes con Enfermedad Renal Crónica en diferentes estadios, participantes de un programa de nefroprotección en el departamento de Nariño durante el período 2016-2018. La progresión de la ERC, correspondió a la disminución de la Tasa de Filtración Glomerular en 5mL/min/1.73 m2 o más. La información se obtuvo de la base de datos del programa. Se construyó un modelo explicativo ajustado por variables demográficas y clínicas. Acorde al diseño se utilizó un modelo binomial con función de enlace logarítmica para estimar los coeficientes de regresión de las variables de interés. Las medidas de asociación fueron los Riesgos Relativos. Resultados: el 72,2% fueron mujeres, el 75,1% tenían 60 años o más, el 12,4% eran afrocolombinos, y el 85% mestizos, se presentó progresión el 49,2% (IC 95% 47,9-50,4) de los casos. Los factores que mejor explicaron la relación la progresión de ERC, fueron: ser hombre con un RR ajustado de 1,04 (IC95%:1,00-1,15), y tener un estadio de la ERC, de 4, 5 y 3a-b, con RR ajustado 1,62 (IC1,36-1,94) y 1,41 (IC1,21-1,63) respectivamente. Conclusiones: En la población nariñense de Colombia afiliada a un programa de nefroprotección, la progresión de la ERC fue del 49,2%, siendo explicada de forma significativa por el sexo masculino, y los estadios avanzados de la enfermedad.

Abstract Introduction: Chronic Kidney Disease is a pathology of great impact on public health worldwide, its progression is determined by limitations in the control of its risk factors and prognosis. Nephroprotection programs monitor, control, and limit the progression of this disease in the patients while trying to lead them to meet the specific program goals. Objective: To determine the factors that boost the progression of Chronic Kidney Disease in patients treated in a nephroprotection program. Materials and methods: This retrospective analytical observational cohort study was carried out in 5872 patients from a nephroprotection program with different stages of Chronic Kidney Disease, in the department of Nariño between 2016 and 2018. The progression of CKD corresponded to a decrease in the Glomerular Filtration Rate by 5mL / min / 1.73 m2 or more; this information was obtained from the program's database. An explanatory model was built and adjusted taking into consideration demographic and clinical variables. According to the design, a binomial model with a logarithmic link function was used to estimate the regression coefficients of the variables of interest. The association measures were the Relative risks. Results: In the final results it was found that 72.2% were women, 75.1% were 60 years old or older, 12.4% were afro-colombian, 85% were mixed race, and 49.2% presented progression (95% CI 47 , 9-50.4) of the cases. The factors that best explained the relationship between CKD progression were: being a man with an adjusted RR of 1.04 (95% CI: 1.00-1.15), and having a CKD stage of 4, 5 and 3a-b, with adjusted RR 1.62 (CI1.36-1.94) and 1.41 (CI1.21-1.63) respectively. Conclusions: In the Nariño population of Colombia that is affiliated to a nephroprotection program the progression of CKD was 49.2% according to the male sex and the advanced stages of the condition.

Epidemiology of septic shock in prehospital medical services in five Colombian cities. / Epidemiología del shock séptico en un servicio de atención médica prehospitalaria en cinco ciudades colombianas.

OBJECTIVE: To explore the association between demographic and clinical factors and the presentation of septic shock in patients treated by prehospital emergency services in five Colombian cities between 2015 and 2016. METHODS: This was a cross-sectional study with retrospective data collection. Clinical and demographic data were collected from the medical records of patients diagnosed with sepsis who received prehospital care in five Colombian cities in 2015 and 2016. The diagnosis of septic shock was checked in 20% of the cases, generating two analyzed scenarios: observed and verified. Data were analyzed using the chi-square test, Student's t test and an adjusted logistic regression model. Covariates with p < 0.05 were considered significant. RESULTS: There was a higher frequency of septic shock in women (62.6%) and in individuals older than 80 years (64.5%), but these were not differentiating factors for septic shock. The most common source of infection was the urinary tract. In the observed scenario, age over 60 (prevalence ratio (PR): 3.22; 95% confidence interval (CI): 1.45 - 35.01) and history of cancer (PR: 1.20; 95%CI: 1.2 - 12.87) were the characteristics associated with septic shock, whereas in the verified scenario, chronic obstructive pulmonary disease (PR: 1.99; 95%CI: 1.26 - 7.14), history of cancer (PR: 1.15; 95%CI: 1.11 - 6.62) and presence of hypovolemia (PR: 1.41; 95%CI: 1.02 - 5.50) were observed. CONCLUSION: The most important risk factors for septic shock in prehospital care patients in five Colombian cities were oncological and pulmonary diseases and hypovolemia.

Epidemiología del shock séptico en un servicio de atención médica prehospitalaria en cinco ciudades colombianas / Epidemiology of septic shock in prehospital medical services in five Colombian cities

RESUMEN Objetivo: Explorar la asociación entre factores demográficos y clínicos con la presentación de shock séptico en pacientes atendidos en un servicio prehospitalario de emergencias en cinco ciudades colombianas entre los años 2015-2016. Métodos: Estudio de corte transversal con recolección retrospectiva de datos. Se recolectó información clínica y demográfica de las historias clínicas de pacientes con diagnóstico de sepsis que recibieron atención prehospitalaria en cinco ciudades colombianas en los años 2015 y 2016. Se realizó una verificación del diagnóstico de shock séptico en el 20% de los casos, dando origen a dos escenarios analizados: observado y verificado. Se analizó la asociación con pruebas de Chi cuadrado, t de Student y finalmente con un modelo de regresión logística ajustado. Se consideró covariables significativas aquellas con p < 0,05. Resultados: Se presentó una mayor frecuencia del evento en mujeres (62,6%) y en mayores de 80 años (64,5%), sin ser factores diferenciadores para shock séptico. El foco infeccioso más común fue urinario. En el escenario observado, los mayores de 60 años (RP: 3,22; IC95%: 1,45 - 35,01) y el antecedente de cáncer fueron las características asociadas con el shock séptico (RP: 1,20; IC95%: 1,2 - 12,87), mientras que en el grupo verificado fueron la enfermedad pulmonar obstructiva crónica (RP: 1,99; IC95%: 1,26 - 7,14), el antecedente de cáncer (RP: 1,15; IC95%: 1,11 - 6,62) y presencia de hipovolemia (RP: 1,41; IC95%: 1,02 - 5,50). Conclusión: Los factores de riesgo más importantes para shock séptico en pacientes de atención prehospitalaria en cinco ciudades colombianas fueron las enfermedades oncológicas, las pulmonares e hipovolemia.

ABSTRACT Objective: To explore the association between demographic and clinical factors and the presentation of septic shock in patients treated by prehospital emergency services in five Colombian cities between 2015 and 2016. Methods: This was a cross-sectional study with retrospective data collection. Clinical and demographic data were collected from the medical records of patients diagnosed with sepsis who received prehospital care in five Colombian cities in 2015 and 2016. The diagnosis of septic shock was checked in 20% of the cases, generating two analyzed scenarios: observed and verified. Data were analyzed using the chi-square test, Student's t test and an adjusted logistic regression model. Covariates with p < 0.05 were considered significant. Results: There was a higher frequency of septic shock in women (62.6%) and in individuals older than 80 years (64.5%), but these were not differentiating factors for septic shock. The most common source of infection was the urinary tract. In the observed scenario, age over 60 (prevalence ratio (PR): 3.22; 95% confidence interval (CI): 1.45 - 35.01) and history of cancer (PR: 1.20; 95%CI: 1.2 - 12.87) were the characteristics associated with septic shock, whereas in the verified scenario, chronic obstructive pulmonary disease (PR: 1.99; 95%CI: 1.26 - 7.14), history of cancer (PR: 1.15; 95%CI: 1.11 - 6.62) and presence of hypovolemia (PR: 1.41; 95%CI: 1.02 - 5.50) were observed. Conclusion: The most important risk factors for septic shock in prehospital care patients in five Colombian cities were oncological and pulmonary diseases and hypovolemia.

Triatoma dimidiata en Colombia; distribución, ecología e importancia epidemiológica / Triatoma dimidiata in Colombia: Distribution, ecology and epidemiological importance

RESUMEN Triatoma dimidiata es un importante vector de la enfermedad de Chagas en Centroamérica y en los países del norte de Suramérica. En Colombia, tiene una amplia distribución y su presencia se ha reportado en 14 departamentos de las regiones Andina, Caribe, de los Llanos Orientales y del Alto Magdalena, en las cuales ocupa diferentes ecótopos naturales y artificiales. La especie está clasificada como secundaria para la transmisión de Trypanosoma cruzi; sin embargo, su presencia en el ambiente silvestre, peridoméstico y doméstico en la región Andina, y su capacidad de movilizarse entre ellos, le han permitido escapar al control basado en la aspersión con piretroides y ello resalta su importancia en el mantenimiento de la transmisión del parásito debido a la potencial reinfestación de las viviendas. La comprensión de las relaciones de T. dimidiata con su hábitat, así como el empoderamiento de la comunidad, contribuyen al desarrollo de sistemas de control efectivos y perdurables. El propósito de esta revisión fue describir la distribución, los factores de riesgo, la ecología, las características entomológicas y los hábitats de las poblaciones de T. dimidiata en Colombia, y proponer alternativas de intervención acordes con las características particulares de esta especie.

ABSTRACT Triatoma dimidiata is an important vector of Chagas disease in Central America and countries of northern South America. In Colombia, it has a wide geographical distribution with reported presence in 14 departments in the Andean, Caribbean, Eastern plains and Upper Magdalena regions, where it occupies different natural and artificial ecotopes. The species is considered a secondary vector in the transmission of Trypanosoma cruzi. Its presence in wild, peridomestic and intradomiciliary habitats in the Andean region, coupled with its ability to move between them, has allowed it to escape the control based on pyrethroids spraying, highlighting its importance in maintaining transmission of the parasite through the potential reinfestation of homes. Understanding the relation of T. dimidiata and its habitats, as well as the empowerment of communities, will contribute to the development of effective and lasting control systems. The purpose of this review was to describe the distribution, risk factors, ecology, entomological features and habitats of T. dimidiata populations in Colombia, and to propose alternative interventions in agreement with the specific characteristics of the species.

[Triatoma dimidiata in Colombia: Distribution, ecology and epidemiological importance].

Triatoma dimidiata is an important vector of Chagas disease in Central America and countries of northern South America. In Colombia, it has a wide geographical distribution with reported presence in 14 departments in the Andean, Caribbean, Eastern plains and Upper Magdalena regions, where it occupies different natural and artificial ecotopes. The species is considered a secondary vector in the transmission of Trypanosoma cruzi. Its presence in wild, peridomestic and intradomiciliary habitats in the Andean region, coupled with its ability to move between them, has allowed it to escape the control based on pyrethroids spraying, highlighting its importance in maintaining transmission of the parasite through the potential reinfestation of homes.Understanding the relation of T. dimidiata and its habitats, as well as the empowerment of communities, will contribute to the development of effective and lasting control systems.The purpose of this review was to describe the distribution, risk factors, ecology, entomological features and habitats of T. dimidiata populations in Colombia, and to propose alternative interventions in agreement with the specific characteristics of the species.

Environmental Determinants of the Distribution of Chagas Disease Vector Triatoma dimidiata in Colombia.

Triatoma dimidiata (Hemiptera: Reduviidae) is a secondary vector of Trypanosoma cruzi in Colombia and represents an important epidemiological risk mainly in the central and oriental regions of the country where it occupies sylvatic, peridomestic, and intradomestic ecotopes, and because of this complex distribution, its distribution and abundance could be conditioned by environmental factors. In this work, we explored the relationship between T. dimidiata distribution and environmental factors in the northwest, northeast, and central zones of Colombia and developed predictive models of infestation in the country. The associations between the presence ofT. dimidiata and environmental variables were studied using logistic regression models and ecological niche modeling for a sample of villages in Colombia. The analysis was based on the information collected in field about the presence ofT. dimidiata and the environmental data for each village extracted from remote sensing images. The presence of Triatoma dimidiata(Latreille, 1811) was found to be significantly associated with the maximum vegetation index, minimum land surface temperature (LST), and the digital elevation for the statistical model. Temperature seasonality, annual precipitation, and vegetation index were the variables that most influenced the ecological niche model ofT. dimidiata distribution. The logistic regression model showed a good fit and predicted suitable habitats in the Andean and Caribbean regions, which agrees with the known distribution of the species, but predicted suitable habitats in the Pacific and Orinoco regions proposing new areas of research. Improved models to predict suitable habitats forT. dimidiata hold promise for spatial targeting of integrated vector management.

House-level risk factors for Triatoma dimidiata infestation in Colombia.

In Colombia, the main vectors of Trypanosoma cruzi, the causative agent of Chagas disease, are Rhodnius prolixus and Triatoma dimidiata. T. dimidiata is present in the east region of Colombia as domestic, peridomestic, and sylvatic populations, resulting in difficulties for its control. A cost-effective way to prioritize houses for treatment is to stratify houses based on risk factors. In this study, risk factors were evaluated for potential associations with domicile infestation of T. dimidiata. There was an increased likelihood of domestic infestation associated with the presence of mixed roofs (odds ratio [OR] = 36.14, 95% confidence interval [95% CI] = 12.21-106.97), cats (OR = 3.94, 95% CI = 1.36-11.38), rock piles (OR = 5.28, 95% CI = 1.64-16.98), and bushes with height above 10 m (OR = 11.21, 95% CI = 2.08-60.45). These factors could be used to target surveillance and control of T. dimidiata to houses with an increased risk of being infested.