[Outbreak of hantavirus pulmonary syndrome in Tucumán, Argentina]. / Brote de síndrome pulmonar por hantavirus, Tucumán, Argentina.

We describe an outbreak of hantavirus pulmonary syndrome in the Burruyacú Department, Province of Tucumán. The detection in 2016 of a case of hantavirosis affecting a 23-year-old woman, considered at that time to be the first case occurred in that province, promoted a thorough epidemiological study. The investigation allowed the retrospective detection of another case occurred one month earlier in a 5-year-old child in the same Department. In both cases, the infection was confirmed by serology (case 1 at days 4 and 7 of disease onset, case 2 at day 4) and the viral genotype was characterized as HU39694. The contacts of both cases were serologically negative for hantavirus. The rodents captured in the area belonged to genus Akodon, genus Calomys and species Mus musculus. Oligoryzomys, the known reservoir for this viral genotype, was not found. Specific anti-hantavirus antibodies were not detected in the captured rodents. Given that the patients had not visited hantavirus endemic areas and their contacts were negative for hantavirus, we infer that the patients were locally exposed to fluids of infected rodents during their usual social or recreational outdoor activities. In conclusion, we demonstrate that hantavirus HU39694 -a genotype until now considered to be restricted to the Central Pampas of the country- is circulating in the North Western province of Tucumán. The endemic area of hantavirosis is thus expanded to this province but the viral reservoir in the area has not yet been identified.

Brote de síndrome pulmonar por hantavirus, Tucumán, Argentina / Outbreak of hantavirus pulmonary syndrome in Tucumán, Argentina

Se describe un brote de síndrome pulmonar por hantavirus en el departamento de Burruyacú, provincia de Tucumán. La detección en 2016 de un caso de hantavirosis en una joven de 23 años -en ese momento considerado el primero ocurrido en dicha provincia- promovió un estudio epidemiológico exhaustivo, que permitió detectar retrospectivamente otro caso ocurrido en un niño de 5 años, un mes antes, en el mismo departamento. La infección fue confirmada por serología en ambos casos (caso 1 en muestras de 4 y 7 días de evolución, caso 2 en muestra a los 4 días). En ambos casos el genotipo viral fue caracterizado como HU39694 y los contactos fueron serológicamente negativos. En las áreas fueron identificados roedores pertenecientes a los géneros Akodon y Calomys y a la especie Mus musculus, pero no a Oligoryzomys, el reservorio habitual del genotipo HU39694. Tampoco se detectaron anticuerpos anti-hantavirus en suero de los roedores capturados. La ausencia de registro de viajes a área endémica de este genotipo y los hábitos recreacionales de los pacientes, sumados a los resultados serológicos negativos para hantavirus en los contactos, permiten inferir la posible exposición de los pacientes a fluidos de roedores infectados durante actividades recreativas o sociales al aire libre en sus respectivas áreas de residencia. En conclusión, se demuestra la circulación en Tucumán del genotipo viral HU39694, hasta ahora considerado restringido a la región pampeana central. Se extiende así a Tucumán el área endémica de hantavirosis, pero no se identificó el reservorio en el área.

We describe an outbreak of hantavirus pulmonary syndrome in the Burruyacú Department, Province of Tucumán. The detection in 2016 of a case of hantavirosis affecting a 23-year-old woman, considered at that time to be the first case occurred in that province, promoted a thorough epidemiological study. The investigation allowed the retrospective detection of another case occurred one month earlier in a 5-year-old child in the same Department. In both cases, the infection was confirmed by serology (case 1 at days 4 and 7 of disease onset, case 2 at day 4) and the viral genotype was characterized as HU39694. The contacts of both cases were serologically negative for hantavirus. The rodents captured in the area belonged to genus Akodon, genus Calomys and species Mus musculus. Oligoryzomys, the known reservoir for this viral genotype, was not found. Specific anti-hantavirus antibodies were not detected in the captured rodents. Given that the patients had not visited hantavirus endemic areas and their contacts were negative for hantavirus, we infer that the patients were locally exposed to fluids of infected rodents during their usual social or recreational outdoor activities. In conclusion, we demonstrate that hantavirus HU39694 -a genotype until now considered to be restricted to the Central Pampas of the country- is circulating in the North Western province of Tucumán. The endemic area of hantavirosis is thus expanded to this province but the viral reservoir in the area has not yet been identified.

Single-dose Universal Hepatitis A Immunization in One-year-old Children in Argentina: High Prevalence of Protective Antibodies up to 9 Years After Vaccination.

BACKGROUND: Single-dose hepatitis A virus (HAV) vaccination was implemented in all Argentinean children 12 months of age in 2005. Previous studies demonstrated high prevalence of protective antibody response 4 years after single-dose vaccination. This study assessed long-term seroprotection against HAV after vaccination. METHODS: Children who received 1 dose of HAV vaccine at 1 year of age at least 6 years before enrollment were included at 5 centers in Argentina between 2013 and 2014. Demographic and socioeconomic characteristics were collected through a questionnaire. Blood samples were tested for anti-HAV antibodies. Antibody values ≥10 mIU/mL were considered seroprotective. Logistic regression analysis was performed to evaluate the association between demographic and socioeconomic variables and seroprotection. RESULTS: A total of 1088 children were included, with a median postvaccination interval of 7.7 years (range 6.3-9.2 years). Of these children, 97.4% (95% confidence interval: 96.3%-98.3%) had protective antibodies against HAV. No association between demographic or socioeconomic variables and seroprotection was found. Geometric mean concentration of antibody levels against HAV was 170.5 mUI/mL (95% confidence interval: 163.2-178.2 mUI/mL). CONCLUSIONS: Single-dose universal hepatitis A immunization in 1-year-old children resulted in sustained immunologic protection for up to 9 years in Argentina. These findings, along with the low current disease burden, confirm the success of the intervention.

[Prevalence of specific antibodies for celiac disease in children attended in the Nutritional Recovery Program in San Miguel de Tucumán, Argentina]. / Prevalencia de anticuerpos específicos para enfermedad celíaca en niños del Programa de Rehabilitación Nutricional en San Miguel de Tucumán, Argentina.

Celiac disease is a systemic autoimmune disease that affects 1.26% of the Argentine pediatric population. Our purpose was to study the prevalence of specific antibodies of celiac disease in a risk group and to find the association with specific factors. This was a cross-sectional study conducted in children ofa Nutritional Recovery Program from 1 year and 9 months to 6 years and 9 months old, from one Health Area of Tucumán Province, during 2010 and 2011, in a random cluster sample. It was studied a population of 175 children. We identified 3 cases with positive serology, equivalent to 1.7% of the study population. The association between cases with positive serology for celiac disease and other variables referred could not be established.

Factores relacionados con el examen de papanicolaou y la mortalidad por cáncer de cuello uterino en Argentina, 2009-2010 / Papanicolaou-Related Factors and Mortality from Cervical Cancer in Argentina, 2009-2010

INTRODUCCION: A pesar de la utilidad del examen de Papanicolaou (PAP), el cáncer de cuello uterino (CCU) es una de las principales causas de muerte por cáncer en Argentina. OBJETIVO: Estimar la relación que tiene la realización de PAP, por un lado, con los factores sociodemográficos y, por el otro, con la mortalidad por CCU. METODOS: Se efectuó un estudio de corte transversal y de tipo ecológico. Las variables analizadas fueron: proporción de realización de PAP, edad, cobertura de salud, necesidades básicas insatisfechas(NBI), nivel de instrucción y estado civil. Se realizó un análisis bivariado y multivariado, calculando OR e IC 95%. Se consideró la asociación con p<0,05. RESULTADOS: Tomando como referencia basal al grupo de 18 a 24 años, presentaron más chances de realizarse PAP las mujeres de 25-34 años [OR 2,56 (IC 95%: 2,31-2,84)], de 35-49 [OR 2,95 (IC 95%: 2,67-3,26)], de 50-65 [OR 1,89 (IC 95%:1,71-2,09)] y de 66 o más [OR 0,63 (IC 95%: 0,57-0,70)]. Presentaron más chances de no realizarse PAP las mujeres con NBI [OR 1,71 (IC 95%: 1,58-1,86)], sin instrucción [OR 4,12 (IC 95%: 3,29-5,19)], sin cobertura de salud [OR 1,47 (IC 95%: 1,37-1,57)] y sin unión estable [OR 2,0 (IC 95%: 1,89-2,12)]. La tasa de mortalidad por CCU en 2010 fue de 14,8 por 100.000 mujeres. La correlación entre tasa de mortalidad por CCU y realización de PAP fue de β1=-0,20, IC 95%:-0,39 a -0,01, R2:0,17. CONCLUSIONES: Los factores sociodemográficos analizados están asociados con la realización de PAP. A mayor proporción de exámenes, se reduce la tasa de mortalidad por CCU (AU)

INTRODUCTION: Despite the usefulness of Papanicolaou test (Pap), cervical cancer (CC) is aleading cause of cancer deaths in Argentina. OBJECTIVE: To estimate the relationship between Pap and sociodemographic factors, and CC mortality. METHODS: A cross-sectional and ecological study was performed. The variables analyzed were: Pap ratio, age, health coverage, unsatisfied basic needs (UBN), education level and marital status. Bivariate and multivariate analysis was conducted, calculating OR and 95% CI. Association was considered at p<0.05. RESULTS: Taking as reference the group of 18-24 years women aged25-34 years [OR 2.56 (CI 95%: 2.31-2.84)], 35-49 [OR2.95 (CI 95%: 2.67-3.26)], 50-65 [OR 1.89 (CI 95%:1.71-2.09)] and 66 or older [OR 0.63 (CI 95%: 0.57-0.70)] had more chances of Pap. There was a higher chance of not performing Pap in women with UBN [OR1.71 (CI 95%: 1.58-1.86)], illiterate [OR 4.12 (CI 95%:3.29-5.19)], without health coverage [OR 1.47 (CI 95%:1.37-1.57)] and without stable partner [OR 2.0 (CI 95%:1.89-2.12)]. CC mortality rate in 2010 was 14.8 per100000 women. Correlation between CC mortality rateand Pap smears was β1=-0.20, CI 95%: -0.39 to -0.01,R2:0.17. CONCLUSIONS: The sociodemographic factors are related to the chance of performing Pap. A higher proportion of tests will reduce the mortality rate CCU (AU)

Factores relacionados con el examen de papanicolaou y la mortalidad por cáncer de cuello uterino en Argentina, 2009-2010 / Papanicolaou-Related Factors and Mortality from Cervical Cancer in Argentina, 2009-2010

INTRODUCCIÓN: A pesar de la utilidad del examen de Papanicolaou (PAP), el cáncer de cuello uterino (CCU) es una de las principales causas de muerte por cáncer en Argentina. OBJETIVO: Estimar la relación que tiene la realización de PAP, por un lado, con los factores sociodemográficos y, por el otro, con la mortalidad por CCU. MÉTODOS: Se efectuó un estudio de corte transversal y de tipo ecológico. Las variables analizadas fueron: proporción de realización de PAP, edad, cobertura de salud, necesidades básicas insatisfechas(NBI), nivel de instrucción y estado civil. Se realizó un análisis bivariado y multivariado, calculando OR e IC 95%. Se consideró la asociación con p<0,05. RESULTADOS: Tomando como referencia basal al grupo de 18 a 24 años, presentaron más chances de realizarse PAP las mujeres de 25-34 años [OR 2,56 (IC 95%: 2,31-2,84)], de 35-49 [OR 2,95 (IC 95%: 2,67-3,26)], de 50-65 [OR 1,89 (IC 95%:1,71-2,09)] y de 66 o más [OR 0,63 (IC 95%: 0,57-0,70)]. Presentaron más chances de no realizarse PAP las mujeres con NBI [OR 1,71 (IC 95%: 1,58-1,86)], sin instrucción [OR 4,12 (IC 95%: 3,29-5,19)], sin cobertura de salud [OR 1,47 (IC 95%: 1,37-1,57)] y sin unión estable [OR 2,0 (IC 95%: 1,89-2,12)]. La tasa de mortalidad por CCU en 2010 fue de 14,8 por 100.000 mujeres. La correlación entre tasa de mortalidad por CCU y realización de PAP fue de β1=-0,20, IC 95%:-0,39 a -0,01, R2:0,17. CONCLUSIONES: Los factores sociodemográficos analizados están asociados con la realización de PAP. A mayor proporción de exámenes, se reduce la tasa de mortalidad por CCU

INTRODUCTION: Despite the usefulness of Papanicolaou test (Pap), cervical cancer (CC) is aleading cause of cancer deaths in Argentina. OBJECTIVE: To estimate the relationship between Pap and sociodemographic factors, and CC mortality. METHODS: A cross-sectional and ecological study was performed. The variables analyzed were: Pap ratio, age, health coverage, unsatisfied basic needs (UBN), education level and marital status. Bivariate and multivariate analysis was conducted, calculating OR and 95% CI. Association was considered at p<0.05. RESULTS: Taking as reference the group of 18-24 years women aged25-34 years [OR 2.56 (CI 95%: 2.31-2.84)], 35-49 [OR2.95 (CI 95%: 2.67-3.26)], 50-65 [OR 1.89 (CI 95%:1.71-2.09)] and 66 or older [OR 0.63 (CI 95%: 0.57-0.70)] had more chances of Pap. There was a higher chance of not performing Pap in women with UBN [OR1.71 (CI 95%: 1.58-1.86)], illiterate [OR 4.12 (CI 95%:3.29-5.19)], without health coverage [OR 1.47 (CI 95%:1.37-1.57)] and without stable partner [OR 2.0 (CI 95%:1.89-2.12)]. CC mortality rate in 2010 was 14.8 per100000 women. Correlation between CC mortality rateand Pap smears was β1=-0.20, CI 95%: -0.39 to -0.01,R2:0.17. CONCLUSIONS: The sociodemographic factors are related to the chance of performing Pap. A higher proportion of tests will reduce the mortality rate CCU

Incidence of influenza-associated mortality and hospitalizations in Argentina during 2002-2009.

BACKGROUND: We estimated rates of influenza-associated deaths and hospitalizations in Argentina, a country that recommends annual influenza vaccination for persons at high risk of complications from influenza illness. METHODS: We identified hospitalized persons and deaths in persons diagnosed with pneumonia and influenza (P&I, ICD-10 codes J10-J18) and respiratory and circulatory illness (R&C, codes I00-I99 and J00-J99). We defined the influenza season as the months when the proportion of samples that tested positive for influenza exceeded the annual median. We used hospitalizations and deaths during the influenza off-season to estimate, using linear regression, the number of excess deaths that occurred during the influenza season. To explore whether excess mortality varied by sex and whether people were age <65 or ≥ 65 years, we used Poisson regression of the influenza-associated rates. RESULTS: During 2002-2009, 2411 P&I and 8527 R&C mean excess deaths occurred annually from May to October. If all of these excess deaths were associated with influenza, the influenza-associated mortality rate was 6/100,000 person-years (95% CI 4-8/100,000 person-years for P&I and 21/100,000 person-years (95% CI 12-31/100,000 person-years) for R&C. During 2005-2008, we identified an average of 7868 P&I excess hospitalizations and 22,994 R&C hospitalizations per year, resulting in an influenza-associated hospitalization rate of 2/10,000 person-years (95% CI 1-3/10,000 person-years) for P&I and 6/10,000 person-years (95% CI 3-8/10,000 person-years) for R&C. CONCLUSION: Our findings suggest that annual rates of influenza-associated hospitalizations and death in Argentina were substantial and similar to neighboring Brazil.

Mortality, severe acute respiratory infection, and influenza-like illness associated with influenza A(H1N1)pdm09 in Argentina, 2009.

INTRODUCTION: While there is much information about the burden of influenza A(H1N1)pdm09 in North America, little data exist on its burden in South America. METHODS: During April to December 2009, we actively searched for persons with severe acute respiratory infection and influenza-like illness (ILI) in three sentinel cities. A proportion of case-patients provided swabs for influenza testing. We estimated the number of case-patients that would have tested positive for influenza by multiplying the number of untested case-patients by the proportion who tested positive. We estimated rates by dividing the estimated number of case-patients by the census population after adjusting for the proportion of case-patients with missing illness onset information and ILI case-patients who visited physicians multiple times for one illness event. RESULTS: We estimated that the influenza A(H1N1)pdm09 mortality rate per 100,000 person-years (py) ranged from 1.5 among persons aged 5-44 years to 5.6 among persons aged ≥ 65 years. A(H1N1)pdm09 hospitalization rates per 100,000 py ranged between 26.9 among children aged <5 years to 41.8 among persons aged ≥ 65 years. Influenza A(H1N1)pdm09 ILI rates per 100 py ranged between 1.6 among children aged <5 to 17.1 among persons aged 45-64 years. While 9 (53%) of 17 influenza A(H1N1)pdm09 decedents with available data had obesity and 7 (17%) of 40 had diabetes, less than 4% of surviving influenza A(H1N1)pdm09 case-patients had these pre-existing conditions (p ≤ 0.001). CONCLUSION: Influenza A(H1N1)pdm09 caused a similar burden of disease in Argentina as in other countries. Such disease burden suggests the potential value of timely influenza vaccinations.

Determinación de zonas de riesgo al agua arsenical y prevalencia de hacre en Villa Belgrano, Tucumán, Argentina / Determination of zones exposed to Arsenical Water and CERHA prevalence in Villa Belgrano, Tucumán, Argentina

INTRODUCCION: En Tucumán la concentración de arsénico en agua fluctúa entre 0,1 y 0,01 ppm. El sistema de salud carece de registro de casos. OBJETIVOS: Elaborar un mapa de riesgo ambiental, estimar la prevalencia de hidroarsenicismo crónico regional endémico (HACRE) y explorar la relación entre la concentración de arsénico en agua y las manifestaciones clínicas en Villa Belgrano, Tucumán. METODOS: estudio transversal. Se analizaron todas las fuentes de agua y se seleccionaron aleatoriamente 119 personas adultas. Para la definición de caso de HACRE se utilizó un criterio diferente al de la Organización Mundial de la Salud (OMS) en concentración de arsénico en agua, orina y cabello y tiempo de consumo, siendo éste más sensible en el valor de corte de arsénico en el agua. Se consideró caso definido a quien había consumido agua con un nivel de arsénico mayor a 0,01 partes por millón(ppm) por más de 5 años y presentado más de 3 ug/g en cabello y/o más de 40 ug/g en orina, con clínica compatible. RESULTADOS: El 75% de las fuentes de agua tenían valores mayores a 0,01 ppm de arsénico. Con los criterios de la OMS, se registraron 51 casos probables y no hubo casos definidos. Según los criterios del estudio, hubo 3 casos definidos y una prevalencia del 2,6%. No se halló una asociación entre lesiones no cutáneas o cutáneas graves y valores mayores a 0,01 ppm. CONCLUSIONES: La prevalencia estimada según los criterios del estudio tuvo valores similares a los establecidos en la bibliografía bajo las condiciones en cuestión, aunque con otros criterios no comparables.(AU)

INTRODUCTION: In Tucumán, the arsenic concentration in water fluctuates between 0,1 and 0,01 ppm.The provincial health system does not have any record of cases. OBJECTIVES: To identify and create a map of environmental risk, estimating also chronic endemic regional hydroarsenicism(CERHA) prevalence in Villa Belgrano and exploring the relation between arsenic concentration in water and clinical manifestations. METHODS: A cross-sectional study was performed. All water sources were analyzed and 119 adults were randomly selected. The definition of case considered the own criteria, which differed from the ones of World Health Organization (WHO) regarding arsenic concentration in water, urine and hair as well as time of consumption. The study criteria is most sensible in arsenic water concentration. Those who had consumed water with more than 0.01 parts per million (ppm) for over 5 years and presented more than 3 ug/g in hair and/or more than 40 ug/gin urine with compatible clinical signs were considered as cases. RESULTS: 75 % of water sources had arsenic levels higher than 0.01 ppm. According to the WHO criteria, there were 51 probable cases and there was not any defined case. According to the study criteria, there were 3 defined cases with a prevalence of 2.6%. The study did not find an association between withnon-cutaneous or serious cutaneous injuries and arsenic levelin water higher than 0.01 ppm. CONCLUSIONS: The prevalence estimated according to the study criteria was similar to the one established in the bibliography under the same conditions, though with other criteria which are not comparable.(AU)

Determinación de zonas de riesgo al agua arsenical y prevalencia de hacre en Villa Belgrano, Tucumán, Argentina / Determination of zones exposed to Arsenical Water and CERHA prevalence in Villa Belgrano, Tucumán, Argentina

INTRODUCCION: En Tucumán la concentración de arsénico en agua fluctúa entre 0,1 y 0,01 ppm. El sistema de salud carece de registro de casos. OBJETIVOS: Elaborar un mapa de riesgo ambiental, estimar la prevalencia de hidroarsenicismo crónico regional endémico (HACRE) y explorar la relación entre la concentración de arsénico en agua y las manifestaciones clínicas en Villa Belgrano, Tucumán. METODOS: estudio transversal. Se analizaron todas las fuentes de agua y se seleccionaron aleatoriamente 119 personas adultas. Para la definición de caso de HACRE se utilizó un criterio diferente al de la Organización Mundial de la Salud (OMS) en concentración de arsénico en agua, orina y cabello y tiempo de consumo, siendo éste más sensible en el valor de corte de arsénico en el agua. Se consideró caso definido a quien había consumido agua con un nivel de arsénico mayor a 0,01 partes por millón(ppm) por más de 5 años y presentado más de 3 ug/g en cabello y/o más de 40 ug/g en orina, con clínica compatible. RESULTADOS: El 75% de las fuentes de agua tenían valores mayores a 0,01 ppm de arsénico. Con los criterios de la OMS, se registraron 51 casos probables y no hubo casos definidos. Según los criterios del estudio, hubo 3 casos definidos y una prevalencia del 2,6%. No se halló una asociación entre lesiones no cutáneas o cutáneas graves y valores mayores a 0,01 ppm. CONCLUSIONES: La prevalencia estimada según los criterios del estudio tuvo valores similares a los establecidos en la bibliografía bajo las condiciones en cuestión, aunque con otros criterios no comparables.(AU)

INTRODUCTION: In Tucumán, the arsenic concentration in water fluctuates between 0,1 and 0,01 ppm.The provincial health system does not have any record of cases. OBJECTIVES: To identify and create a map of environmental risk, estimating also chronic endemic regional hydroarsenicism(CERHA) prevalence in Villa Belgrano and exploring the relation between arsenic concentration in water and clinical manifestations. METHODS: A cross-sectional study was performed. All water sources were analyzed and 119 adults were randomly selected. The definition of case considered the own criteria, which differed from the ones of World Health Organization (WHO) regarding arsenic concentration in water, urine and hair as well as time of consumption. The study criteria is most sensible in arsenic water concentration. Those who had consumed water with more than 0.01 parts per million (ppm) for over 5 years and presented more than 3 ug/g in hair and/or more than 40 ug/gin urine with compatible clinical signs were considered as cases. RESULTS: 75 % of water sources had arsenic levels higher than 0.01 ppm. According to the WHO criteria, there were 51 probable cases and there was not any defined case. According to the study criteria, there were 3 defined cases with a prevalence of 2.6%. The study did not find an association between withnon-cutaneous or serious cutaneous injuries and arsenic levelin water higher than 0.01 ppm. CONCLUSIONS: The prevalence estimated according to the study criteria was similar to the one established in the bibliography under the same conditions, though with other criteria which are not comparable.(AU)

Determinación de zonas de riesgo al agua arsenical y prevalencia de hacre en Villa Belgrano, Tucumán, Argentina / Determination of zones exposed to Arsenical Water and CERHA prevalence in Villa Belgrano, Tucumán, Argentina

INTRODUCCIÓN: En Tucumán la concentración de arsénico en agua fluctúa entre 0,1 y 0,01 ppm. El sistema de salud carece de registro de casos. OBJETIVOS: Elaborar un mapa de riesgo ambiental, estimar la prevalencia de hidroarsenicismo crónico regional endémico (HACRE) y explorar la relación entre la concentración de arsénico en agua y las manifestaciones clínicas en Villa Belgrano, Tucumán. MÉTODOS: estudio transversal. Se analizaron todas las fuentes de agua y se seleccionaron aleatoriamente 119 personas adultas. Para la definición de caso de HACRE se utilizó un criterio diferente al de la Organización Mundial de la Salud (OMS) en concentración de arsénico en agua, orina y cabello y tiempo de consumo, siendo éste más sensible en el valor de corte de arsénico en el agua. Se consideró caso definido a quien había consumido agua con un nivel de arsénico mayor a 0,01 partes por millón(ppm) por más de 5 años y presentado más de 3 ug/g en cabello y/o más de 40 ug/g en orina, con clínica compatible. RESULTADOS: El 75% de las fuentes de agua tenían valores mayores a 0,01 ppm de arsénico. Con los criterios de la OMS, se registraron 51 casos probables y no hubo casos definidos. Según los criterios del estudio, hubo 3 casos definidos y una prevalencia del 2,6%. No se halló una asociación entre lesiones no cutáneas o cutáneas graves y valores mayores a 0,01 ppm. CONCLUSIONES: La prevalencia estimada según los criterios del estudio tuvo valores similares a los establecidos en la bibliografía bajo las condiciones en cuestión, aunque con otros criterios no comparables.

INTRODUCTION: In Tucumán, the arsenic concentration in water fluctuates between 0,1 and 0,01 ppm.The provincial health system does not have any record of cases. OBJECTIVES: To identify and create a map of environmental risk, estimating also chronic endemic regional hydroarsenicism(CERHA) prevalence in Villa Belgrano and exploring the relation between arsenic concentration in water and clinical manifestations. METHODS: A cross-sectional study was performed. All water sources were analyzed and 119 adults were randomly selected. The definition of case considered the own criteria, which differed from the ones of World Health Organization (WHO) regarding arsenic concentration in water, urine and hair as well as time of consumption. The study criteria is most sensible in arsenic water concentration. Those who had consumed water with more than 0.01 parts per million (ppm) for over 5 years and presented more than 3 ug/g in hair and/or more than 40 ug/gin urine with compatible clinical signs were considered as cases. RESULTS: 75 % of water sources had arsenic levels higher than 0.01 ppm. According to the WHO criteria, there were 51 probable cases and there was not any defined case. According to the study criteria, there were 3 defined cases with a prevalence of 2.6%. The study did not find an association between withnon-cutaneous or serious cutaneous injuries and arsenic levelin water higher than 0.01 ppm. CONCLUSIONS: The prevalence estimated according to the study criteria was similar to the one established in the bibliography under the same conditions, though with other criteria which are not comparable.

Determinación de zonas de riesgo al agua arsenical y prevalencia de hidroarsenicismo crónico regional endémico en Villa Belgrano, Tucumán / Determination of zones exposed to arsenic water and chronic endemic regional hydroarsenicism prevalence in Villa Belgrano, Tucumán

INTRODUCCION: El hidroarsenicismo crónico regional endémico (HACRE) es una enfermedad causada por el consumo de agua contaminada con arsénico. En Tucumán, la concentración de arsénico en agua potable fluctúa entre 0,1 y 0,01 ppm. Aunque existen estudios, el sistema provincial de salud no cuenta con un registro de casos.OBJETIVO: Identificar zonas de riesgo y generar un mapa ambiental. Estimar la prevalencia de HACRE en Villa Belgrano. Explorar la relación de arsénico en agua con manifestaciones clínicas.METODOS: Se realizó un estudio de corte transversal. Se analizaron las fuentes de agua y se seleccionaron aleatoriamente 119 adultos para un estudio clínico y de biomarcadores. Los valores de referencia fueron 40 Ag/g para orina y 3 Ag/g para pelo. Se consideró caso a quien había consumido agua con arsénico con más de 0,01 ppm por más de 5 años y presentado más de 1 Ag/g en pelo y/o 40Ag/g en orina y clínica compatible. Según la Organización Mundial de la Salud (OMS), se observó si la concentración en agua difería en más de 0,05 ppm por más de 6 meses y si el nivel en orina era mayor a 50 Ag/l. Se utilizó Chi2 para comparar proporciones. En todos los casos se consideró un nivel de significancia de p=0,05.RESULTADOS: EL 75% de las fuentes de agua tenían más de 0,01 ppm de arsénico. Según el criterio de la OMS, hubo 51 casos probables y ninguno definido. Según el estudio, hubo 3 casos definidos. De los 119 pacientes estudiados, 54 (45%) presentaron manifestaciones dermatológicas. Los valores en pelo fueron siempre menores a 1 Ag/g. La prevalencia fue de 2,6%, con IC 95% (-0,34 - 5,47). No hubo casos definidos según el criterio de la OMS. No se halló asociación con lesiones cutáneas graves, manifestaciones sistémicas ni niveles elevados de arsénico en orina/pelo o niveles de agua superiores a 0,01 ppm.CONCLUSIONES: Sería importante considerar el enfoque empelado en este estudio para replicarlo en distintas áreas de la provincia expuestas al agua arsenical.

INTRODUCTION: The chronic endemic regional hydroarsenicism (CERHA) is a disease caused by the consumption of arsenic-contaminated water. In Tucumán, the concentration of arsenic in drinkable water is betweer 0.1 and 0.01 ppm. Although there were studies, the provincial health system does not have a record of cases.OBJECTIVE: To identify zones of risk and create a map, estimating also CERHA prevalence and exploring the relation between arsenic in water and clinical manifestations.METHODS: A cross-sectional study was performed. The water sources were analyzed and 119 adults were randomly selected for clinical and biomarker trials. The reference values were 40Ag/g for urine and 3Ag/g for hair. Those who had consumed water with more than 0.01 ppm for over 5 years and presented more than 1Ag/g in hair and/or 40Ag/g in urine with compatible clinical signs were considered as cases. According to the criteria of World Health Organization (WHO), it was considered if the concentration in watter differed by more than 0.05 ppm for over 6 months and if arsenic level in urine was higher than 50Ag/l. Chi2 was used to compare proportions. All the cases considered a level of significance of p=0.05. RESULTS: 75% of water sources had arsenic levels higher than 0.01 ppm. According to the WHO criteria, there were 51 probable cases and there was not any defined case. According to the study criteria, there were 3 defined cases. Of 119 studied patients, 54 (45%) showed some dermatological manifestations. The values in hair were always lower than 1 Ag/g. The prevalence was 2.6%, with CI 95% (-0.34 - 5.47). There was not any case defined according to WHO. The study did not find an association with serious cutaneous injuries, systemic manifestations, high arsenic level in urine/hair or arsenic level in water higher than 0.01 ppm.CONCLUSIONS: It would be important to consider the approach of this study to implement it in other provincial locations exposed to high arsenic concentrations.

Determinación de zonas de riesgo al agua arsenical y prevalencia de hidroarsenicismo crónico regional endémico en Villa Belgrano, Tucumán / Determination of zones exposed to arsenic water and chronic endemic regional hydroarsenicism prevalence in Villa Belgrano, Tucumán

INTRODUCCION: El hidroarsenicismo crónico regional endémico (HACRE) es una enfermedad causada por el consumo de agua contaminada con arsénico. En Tucumán, la concentración de arsénico en agua potable fluctúa entre 0,1 y 0,01 ppm. Aunque existen estudios, el sistema provincial de salud no cuenta con un registro de casos.OBJETIVO: Identificar zonas de riesgo y generar un mapa ambiental. Estimar la prevalencia de HACRE en Villa Belgrano. Explorar la relación de arsénico en agua con manifestaciones clínicas.METODOS: Se realizó un estudio de corte transversal. Se analizaron las fuentes de agua y se seleccionaron aleatoriamente 119 adultos para un estudio clínico y de biomarcadores. Los valores de referencia fueron 40 Ag/g para orina y 3 Ag/g para pelo. Se consideró caso a quien había consumido agua con arsénico con más de 0,01 ppm por más de 5 años y presentado más de 1 Ag/g en pelo y/o 40Ag/g en orina y clínica compatible. Según la Organización Mundial de la Salud (OMS), se observó si la concentración en agua difería en más de 0,05 ppm por más de 6 meses y si el nivel en orina era mayor a 50 Ag/l. Se utilizó Chi2 para comparar proporciones. En todos los casos se consideró un nivel de significancia de p=0,05.RESULTADOS: EL 75% de las fuentes de agua tenían más de 0,01 ppm de arsénico. Según el criterio de la OMS, hubo 51 casos probables y ninguno definido. Según el estudio, hubo 3 casos definidos. De los 119 pacientes estudiados, 54 (45%) presentaron manifestaciones dermatológicas. Los valores en pelo fueron siempre menores a 1 Ag/g. La prevalencia fue de 2,6%, con IC 95% (-0,34 - 5,47). No hubo casos definidos según el criterio de la OMS. No se halló asociación con lesiones cutáneas graves, manifestaciones sistémicas ni niveles elevados de arsénico en orina/pelo o niveles de agua superiores a 0,01 ppm.CONCLUSIONES: Sería importante considerar el enfoque empelado en este estudio para replicarlo en distintas áreas de la provincia expuestas al agua arsenical.

INTRODUCTION: The chronic endemic regional hydroarsenicism (CERHA) is a disease caused by the consumption of arsenic-contaminated water. In Tucumán, the concentration of arsenic in drinkable water is betweer 0.1 and 0.01 ppm. Although there were studies, the provincial health system does not have a record of cases.OBJECTIVE: To identify zones of risk and create a map, estimating also CERHA prevalence and exploring the relation between arsenic in water and clinical manifestations.METHODS: A cross-sectional study was performed. The water sources were analyzed and 119 adults were randomly selected for clinical and biomarker trials. The reference values were 40Ag/g for urine and 3Ag/g for hair. Those who had consumed water with more than 0.01 ppm for over 5 years and presented more than 1Ag/g in hair and/or 40Ag/g in urine with compatible clinical signs were considered as cases. According to the criteria of World Health Organization (WHO), it was considered if the concentration in watter differed by more than 0.05 ppm for over 6 months and if arsenic level in urine was higher than 50Ag/l. Chi2 was used to compare proportions. All the cases considered a level of significance of p=0.05. RESULTS: 75% of water sources had arsenic levels higher than 0.01 ppm. According to the WHO criteria, there were 51 probable cases and there was not any defined case. According to the study criteria, there were 3 defined cases. Of 119 studied patients, 54 (45%) showed some dermatological manifestations. The values in hair were always lower than 1 Ag/g. The prevalence was 2.6%, with CI 95% (-0.34 - 5.47). There was not any case defined according to WHO. The study did not find an association with serious cutaneous injuries, systemic manifestations, high arsenic level in urine/hair or arsenic level in water higher than 0.01 ppm.CONCLUSIONS: It would be important to consider the approach of this study to implement it in other provincial locations exposed to high arsenic concentrations.