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Aims: Reliance on unhealthy water sources such as hand dug wells and streams have led to the occurrence of waterborne diseases such as amoebic dysentery, gastroenteritis, typhoid fever and cholera among several communities in Rivers State. This study tends to identify selected multidrug resistant pathogens isolated from streams and wells water sources in three Local Government Areas of Rivers State using molecular techniques. Methodology: A total of 48 well and stream water samples were collected aseptically from 24 sampling sites in Ikwerre, Emohua and Etche Local Government Areas of Rivers State. Samples were analysed using membrane filtration technique for total heterotrophic bacterial count and total coliform count. The well and stream water samples were also cultured for E. coli, Salmonella and Vibrio sp. Antibiotic sensitivity test of the isolates was carried out using the disk diffusion method and multidrug resistant isolates were identified using PCR-based techniques (16S rRNA). Results: The results of this study showed that total aerobic heterotrophic bacteria count occurred more in Emohua LGA for both well and stream water sources with bacterial count of 1.71 x104 cfu/ml for well water samples and 2.35 x 104 cfu/ml for stream water samples. The mean fungal count of the stream water samples was highest in Emohua LGA with 2.55 x 104 cfu/ml followed by Ikwerre LGA which had 4.20 x 103 cfu/ml and Etche LGA with the least count of 1.80 x 102 cfu/ml. All the isolated bacteria species were found to be resistant to more than 50% of the antibiotics used with highest Multi Antibiotic Resistant Index of 0.625. multidrug resistant bacterial isolates identified include Vibrio sp strain 201707CJKOP-Y162 (MG593726), Bacillus sbtilis clone N55 (JQ622582), Chryseobacterium sp strain CB2915-325-DE_0621 (MH512534), Enterobacter sp strain AB55 (MF407145), Klebsiella pneumonia strain M792-16(MH680830), Shigella sonnei strain AR_0030(CP032523), Escherichia coli strain WECHEC025943(CP027205) and Salmonella bongori strain KC153129.116 (MG663494). Conclusion: Access to good quality or potable drinking water and efficient sanitary practices are fundamental to human health and economic development. The occurrence of multidrug resistant pathogenic bacterial isolates in natural water sources requires serious routine evaluation in order to forestall the outbreak of waterborne disease epidemics.
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Las enfermedades transmitidas por el agua son enfermedades provocadas por el consumo del agua contaminada con sustancias químicas y restos fecales de humanos o animales que contiene microorganismos patogénicos. Su importancia ha sido remarcada por distintos organismos internacionales en relación al derecho a la salud universal, hasta el punto de estar contempladas en forma específica dentro del plan de acción de los Objetivos de Desarrollo Sostenible (ODS, Meta 3.3). Si bien este grupo de enfermedades depende en forma importante del abastecimiento de agua potable en la población, existen muchos factores que también inciden en la higiene del agua y el saneamiento. Por ello, el objetivo de este trabajo fue determinar la importancia de distintos factores socio-económicos y sanitarios en la mortalidad por enfermedades transmitidas por el agua en Argentina, analizando la distribución geográfica y evolución de los datos durante el primer decenio del siglo XXI. Para ello, se calcularon tasas específicas de mortalidad por causa y se realizaron regresiones logísticas con variables socioeconómicas seleccionadas. Los resultados muestran una relación lineal más importante de estas enfermedades con la falta de cobertura de obra social, el hacinamiento y pertenencia a un área rural, que con el abastecimiento de agua potable.
Waterborne diseases are diseases caused by the consumption of water contaminated with chemical substances and fecal remains of humans or animals containing pathogenic microorganisms. Its importance has been highlighted by different international organizations in relation to the right to universal health, to the point of being contemplated specifically within the action plan of the Sustainable Development Goals (SDG, Goal 3.3). Although this group of diseases depends heavily on the population's drinking water supply, there are many factors that also affect water hygiene and sanitation. Therefore, the objective of this work was to determine the importance of different socio-economic and health factors in mortality from waterborne diseases in Argentina, analyzing the geographical distribution and evolution of the data during the first decade of the 21st century. To do this, cause-specific mortality rates were calculated and logistic regressions were performed with selected socioeconomic variables. The results showed a more important linear relationship of these diseases with the lack of health coverage, overcrowding and belonging to a rural area, than with the supply of drinking water.
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Las precipitaciones extremas representan uno de los eventos naturales climáticos más importantes y pueden originar inundaciones devastadoras. De junio a agosto del 2014 se registró una de las más graves inundaciones en la historia de la ciudad de Asunción. Ocasionó un incremento considerable del nivel del río Paraguay y el desplazamiento de 300.000 personas a campamentos provisionales. Debido a que el contacto directo con el agua de inundación, el consumo de agua contaminada y la congregación de los afectados en refugios provisorios son factores de riesgo para enfermedades infecciosas, el objetivo de este estudio fue la implementación de una metodología estandarizada para la concentración y detección de virus entéricos y micobacterias no tuberculosas, por PCR en tiempo real y PCR-asociada al análisis de restricción enzimática (PRA), en muestras de agua de inundaciones y el reporte de los patógenos detectados en las zonas afectadas de Asunción y en la Bahía del Río Paraguay. La metodología propuesta demostró poseer buena sensibilidad y se registró la presencia de rotavirus, norovirus (genogrupos I y II), astrovirus, adenovirus entéricos y micobacterias no tuberculosas en 50% (N=4/8) de las muestras de los barrios Sajonia, San Jerónimo y Ricardo Brugada, Chacarita. Además, reportamos datos secundarios de casos de enfermedades infecciosas, registrados en los servicios de salud de los barrios afectados durante el periodo de inundación.
Extreme rainfall represents one of the most important natural climatic events and can cause devastating floods. From June to August 2014, one of the most serious floods in the history of the city of Asunción was recorded. It caused a considerable increase in the level of the Paraguay River and the displacement of 300,000 people to temporary camps. Since direct contact with flood water, consumption of contaminated water and the congregation of those affected in temporary shelters are risk factors for infectious diseases, the objective of this study was the implementation of a standardized methodology for the concentration and detection of enteric viruses and non-tuberculous mycobacteria, by real-time PCR and PCR-associated enzyme restriction analysis (PRA), in samples of flood water and the report of the pathogens detected in the affected areas of Asunción and in the Bay of the Paraguay River. The proposed methodology proved to have good sensitivity and the presence of rotavirus, norovirus (genogroups I and II), astrovirus, enteric adenovirus and non-tuberculous mycobacteria was recorded in 50% (N=4/8) of the samples from the Sajonia, San Jeronimo and Ricardo Brugada, Chacarita neighborhoods. In addition, we report secondary data on cases of infectious diseases, registered in the health services of the affected neighborhoods during the flood period.
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Background: Cholera is a preventable disease, still it remains a major public health problem among developing countries like India. Access to safe water and a sanitary environment can easily control many gastrointestinal infections including Cholera. In the last week of June 2021 large number of acute diarrhoeal cases were reported which was higher than expected subsequently confirmed as an outbreak of Cholera. Objective: To verify the diagnosis, identify risk factors and institute appropriate control measures to control the outbreak. Materials and Methods: A cross-sectional study was undertaken to identify the time, place and personal distribution of the disease. Based on the findings of the descriptive study, sanitary survey and environmental examination a hypothesis was formulated. A case-control study was carried out to test a hypothesis Results: A total of 158 cholera cases were reported with one death. Male and females were affected equally. All age groups affected, 18.35% of the cases were reported among children aged 0-5 years old. It was a common source epidemic and water was source of infection. The water sample reported faecal contamination. Those households not using water purification methods were 1.454 times more affected (OR=1.454) than those using water purification methods. Conclusion: The Vibrio Cholerae bacterium caused the cholera outbreak in Nadiad. Infection was caused by contaminated drinking water.
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The aim of this study was to investigate an outbreak caused by protozoa, which occurred in a municipality in the Brazil southern region. The investigations were carried out analyzing 47 fresh stool samples and 26 water samples by parasitological and molecular methods, as well as, direct immunofluorescence. After the filtrations of water samples and purification of stool samples, the concentrates were evaluated microscopically for presence of parasites. Molecular analyses were performed by polymerase chain reaction (PCR) for DNA detection of Giardia spp., Cryptosporidium parvum, C. hominis and Cyclospora cayetanensis. Out of 26 water samples, 30.8% (8/26) had waterborne protozoa and C. cayetanensis was the most prevalent (15.5%). Out of the 47 stool samples, 23.4% (11/47) were infected with C. cayetanensis and Giardia spp. The results showed that backwash water samples from filters of the Water Treatment Station were contaminated with C. cayetanensis, C. hominis and Giardia spp., suggesting the contamination of water sources with human waste brought by sewage. These results show the importance of protozoa investigation in water and stool samples by laboratory methodologies principally in outbreaks causing acute diarrheal disease (AU).
O objetivo do presente estudo foi investigar um surto causado por protozoários, ocorrido em um município da região sul do Brasil. As investigações foram realizadas analisando 47 amostras de fezes frescas e 26 amostras de água por métodos parasitológicos, moleculares e de imunofluorscência direta. Após as filtrações das amostras de água e purificação das amostras de fezes, os concentrados foram avaliados microscopicamente a procura de parasitas. A seguir, foram analisadas, pela reação em cadeia da polimerase (PCR), a detecção de DNA de Giardia spp., Cryptosporidium parvum, C. hominis e Cyclospora cayetanensis. Das 26 amostras de água, 30,8% (8/26) apresentaram protozoários de veiculação hídrica, sendo que, C. cayetanensis foi o mais prevalente (15,5%). Das 47 amostras de fezes, 23,4% (11/47) estavam infectadas por C. cayetanensis e Giardia spp. Os resultados mostraram que as águas de retrolavagem dos filtros da Estação de Tratamento de Água estavam contaminadas com C. cayetanensis, C. hominis e Giardia spp. sugerindo a contaminação dos mananciais com dejetos humanos trazidos pelo esgoto. Estes resultados mostram a importância da investigação de protozoários em água e fezes por metodologias laboratoriais, principalmente em surtos que causam doença diarreica aguda (AU).
Subject(s)
Protozoan Infections , Disease Outbreaks , Cryptosporidium , Cyclospora , Diarrhea , Waterborne Diseases , GiardiaABSTRACT
RESUMEN Las enfermedades de transmisión hídrica, fueron causa importante de morbilidad y mortalidad durante las primeras décadas del siglo xx en Cuba. La búsqueda y solución de sus orígenes se debatieron por los científicos cubanos en importantes instituciones académicas y su evolución, mostrada a través de las estadísticas sanitarias. El objetivo de este trabajo es examinar las estadísticas sanitarias y las enfermedades de transmisión hídrica en Cuba, entre 1902-1925, a partir de la labor de prominentes científicos cubanos. Es un estudio observacional descriptivo de corte histórico que utilizó el método histórico lógico y el análisis inductivo-deductivo de las fuentes bibliográficas disponibles sobre la temática. Las estadísticas sanitarias y las enfermedades de transmisión hídrica constituían temas importantes en el quehacer de los científicos cubanos, demostrado por los aportes de personalidades como Jorge Le Roy, Carlos J. Finlay, José A. López del Valle, Juan Guiteras Gener y otros, que trascienden como ejemplos imprescindibles para el estudio de estos materiales y marcaron pautas para el desarrollo ulterior de la salud pública cubana. Una parte importante de su labor está recogida en fuentes científicas documentales de la época. El intercambio de ideas entre estas personalidades, demuestra el alto nivel científico y de actualización en que se encontraba la ciencia en Cuba en el primer cuarto del siglo xx. El debate, honesto y respetuoso entre ellos contribuyó al avance de las estadísticas sanitarias y al conocimiento de las enfermedades de transmisión hídrica y por ende, al avance de la ciencia cubana.
ABSTRACT Waterborne diseases were an important cause of morbidity and mortality during the first decades of the 20th century in Cuba. The search and solution of its origins were debated by Cuban scientists in important academic institutions and its evolution were shown through health statistics. The objective of this paper is to examine health statistics and waterborne diseases in Cuba, from 1902 to1925 based on the work of prominent Cuban scientists. This is a descriptive observational study of historical nature that used the logical historical method and the inductive-deductive analysis of the available bibliographic sources on the subject. Health statistics and waterborne diseases were important topics in the work of Cuban scientists, which is established by the contributions of personalities such as Jorge Le Roy, Carlos J. Finlay, José A. López del Valle, Juan Guiteras Gener and others, who transcend as essential examples for the study of these materials, and they set guidelines for the further development of Cuban public health. An important part of his study is collected in documentary scientific sources of the time. The exchange of ideas between these personalities reveals the high scientific and up-to-date level of science in Cuba in the first quarter of the 20th century. The honest and respectful debate among them contributed to the advancement of health statistics and knowledge of waterborne diseases and therefore, to the development of Cuban science.
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Introduction.Sodium hypochlorite is a crucial element in the water treatment process. We aimed to verify if schools that lack adequate access to water and don't provide hygiene education courses would improve water quality after an intervention program. Methods.Twenty schools from the rural area of Burkina Faso were equipped with electro-chlorinator devices that produce sodium hypochlorite and received training to make water drinkable. Data related to behavioral change was collected. In addition, microbiological analysis of fecal coliforms, total coliforms, and fecal streptococci was performed in the drinking water from water stations or water storage containers. These indicators were measured before and two years after the program in six schools that participated, paired with three control schools from the same region. Results.Before the intervention, no schools practiced treating their water. After intervention, schools did it daily. WASH courses and water treatment training were also observed in intervention schools. Only the samples belonging to the control schools contained microorganisms in the drinking water after the intervention, particularly fecal coliforms and total coliforms. Fecal streptococci were not detected in any of the samples analyzed. Before the intervention, 50% of water samples from the intervention group and 66% from the control group were contaminated with fecal coliforms. Conclusion.Schools became independent of external disinfectant production after receiving electro-chlorinator devices and proper training to comply with WASH measures. Our findings might be useful to public health practitioners trying to implement sustainable programs.
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Sodium Hypochlorite , Waterborne Diseases , Schools , Chlorinators , Public Health , EnvironmentABSTRACT
The study was conducted in Shadman and Shahjamal, Lahore. Theresearch focuses on the awareness and uses of water consumers in the area and its connection with the water-borne diarrheal diseases.In the study, water taken from WASA supply or Private Bore Pumps and Boiled water was taken to be as “Plain”. While “filtered” water was standardized as water either from filterplants or from house-hold filters. “Water-borne diarrheal diseases” are taken as the infectious diseases caused by fecal (animal or human) or chemical contamination of water.This descriptive cross-sectional study utilized systematic random sampling, with a sample size of 100. Each participant was required to fill out a pretested questionnaire. The data collected was examinedby using SPSS(Statistical Package for the Social Sciences)version 16.0.Filtered water consumers included a lower percentage of individuals who had suffered from water-borne infections and were seen to have more knowledge regarding water treatment practices and spread of water-borne illnesses. Contrarily, plain water consumers included a higher percentage of individuals who had suffered from water-borne diarrheal diseases and a lower percentage were aware of water treatment practices and water-borne illnesses.Analytical results display a reduced occurrence of water-borne diarrheal diseases associated with filtrationtreatment of drinking water as compared to consumption of plain, untreated water
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Objective:To understand the iodine content of drinking water and iodine nutrition of key population in Anyang City, Henan Province, and to provide a basis for taking targeted prevention and control measures and scientific adjustment of intervention strategies.Methods:In 2019, stratified sampling method was used to carry out water iodine survey in all townships in Anyang City, and in townships with the median water iodine > 10 μg/L, water iodine survey was carried out in administrative villages, and water iodine content was detected. Two hundred children aged 8 - 10 years and 100 pregnant women were selected from each county (city, district) to test iodine contents of their household salt and urine, respectively.Results:Six hundred and eight water samples were collected in Anyang City, and the median water iodine was 5.98 μg/L. One thousand one hundred and fifty-six samples were collected, and the median water iodine was 34.10 μg/L. A total of 1 605 salt samples were collected in the city, and the median salt iodine was 24.30 mg/kg, the coverage rate of iodized salt was 91.8% (1 473/ 1 605). A total of 1 605 urine samples were collected from children in the city, and the median urinary iodine was 170.10 μg/L. Urine samples of 804 pregnant women were collected, and the median urinary iodine was 190.00 μg/L.Conclusion:Most areas of Anyang City still belong to iodine deficiency area, and the median urinary iodine of children and pregnant women is within the suitable range of iodine.
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Objective: The present study aimed to evaluate the microbiological quality of the water and the maintenance and physical structure of public drinking fountains located in the city of Araçatuba SP. Methods: To assess the presence or absence of Escherichia coli and total coliforms in the drinking water 41 samples were randomly collected. Thirteen samples were collected in the year 2018 and 28 samples in 2019. Results: All samples collected in the year 2018 showed no total coliforms and E. coli. However, the samples collected in the year 2019 showed coliforms in 10% (3/28). All the drinking fountains analyzed demonstrated to be inadequate in at least one of the qualitative criteria considered. Conclusion: Our results indicate that are necessary periodic maintenance of the public drinking fountains and the monitoring of its water since these parameters serve as indicators of the integrity of the drinking water distribution system.
Objetivo: O presente estudo teve como objetivo avaliar a qualidade microbiológica da água, a manutenção e estrutura física de bebedouros públicos localizados no município de Araçatuba - SP. Métodos: Para avaliar a presença ou ausência de Escherichia coli e coliformes totais na água de consumo, 41 amostras foram coletadas aleatoriamente. Treze amostras foram coletadas no ano de 2018 e 28 amostras em 2019. Resultados: Todas as amostras coletadas no ano de 2018 não apresentaram coliformes totais e E. coli. Porém, as amostras coletadas no ano de 2019 apresentaram coliformes em 10% (3/28). Todos os bebedouros analisados demonstraram ser inadequados em pelo menos um dos critérios qualitativos considerados. Conclusão: Nossos resultados indicam que são necessários a manutenção periódica dos bebedouros públicos e o monitoramento de sua água, visto que esses parâmetros servem como indicadores da integridade do sistema de distribuição de água potável.
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Drinking Water , Water Quality , Water , Escherichia coli , Coliforms , Indicators and ReagentsABSTRACT
Waterborne diseases are mainly caused by consuming food or water tainted with faecal matter or urine of human or animal which contains pathogens. Records have shown that YobeState is one of the states in Nigeria that have recorded mortalities due to waterborne infections. Thisstudy is aimed at identifying common waterborne diseases such as cholera, typhoid, infectious hepatitis, giadiasis, amoebiasis, and dracunculiasis between 2017 and 2019 in three local Government Areas (L.G.As) of Yobe State. Personal interview was employed to generate information from the local people on sources of drinking water in three sampled geo –political wards (Bade, Nguru and Machine L.G.As). Results revealed that most of the dwellers in the study area drink from non –potable water sources such as faucets, hand pump, wash boreholes, wells, rivers, pools and creeks. Results also show that people from the study area do not drink potable water. A total of 1204 cholera cases were reported between 2017 and 2019 in the study areas with Machina L.G.A having the highest number of cases (446) representing 37.04% of the total cases. Mortality due to cholera outbreak in all the surveyed LG.As was 124 with Bade L.G.A having the highest number (43) constituting 34.68% of total mortalities in the study areas. A total of 11,938 persons were infected with typhoid during the study period and Nguru L.G.A recorded the highest number of infections (4,438) representing 37.18% of total infections. Gender based percentage prevalence of typhoid in the study is higher in males (52.83%) than females (47.18%). Recommendations on how to overcome the menace have been highlighted.
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RESUMO As condições de saneamento básico são um dos principais determinantes nos índices de agravos à saúde humana, principalmente no tocante a doenças infectocontagiosas por veiculação hídrica. Dentre todas, destacamos neste trabalho a cólera: doença entérica causada pelas cepas toxigênicas do Vibrio cholerae (sorogrupos O1 e O139), que é caracterizada por um quadro de acentuada diarreia. O objetivo deste trabalho, por meio de levantamento de dados mundiais de Incidência de Cólera (IC) e percentual populacional de Acesso ao Saneamento (AS), é quantificar, evidenciar e discutir a relação entre esses dois indicadores no período de 2010 a 2015, assim como apontar outros possíveis fatores magnificantes de vulnerabilidade socioambiental para a patologia. No período analisado, foram registrados 1.575.168 casos da doença, com as maiores incidências na região do subcontinente áfrico-asiático e em países isolados nos demais continentes, como, por exemplo, Haiti (América) e Papua Nova Guiné (Oceania), que também apresentaram sérios problemas de acessibilidade a serviços de saneamento. Desta forma, apesar de sugerirmos a análise de outros fatores socioambientais, as condições de saneamento revelaram-se como um determinante expressivo para a incidência da cólera em todas as regiões do mundo.
ABSTRACT Health conditions are among the main factors leading to human health damages, particularly concerning infectious diseases by water transmission. Among those cholera is highlighted in this work: the virus infection of Vibrio cholerae toxicity (serogroups O1 and O139), which is characterized by marked diarrhea. Using incidence data on cholera (CI) and the population percentage of Access to Sanitation (AS) collected throughout the world, the objective of this work is to quantify, highlight and discuss relationship between those two indicators over the period from 2010 to 2015, besides pointing out other possible magnifying factors of socioenvironmental vulnerability to this pathology. Over that period, 1,575,168 cases of the illness were analyzed, showing more frequent occurrences in the region of the African-Asian subcontinent and isolated countries in the other continents, such as Haiti (America) and Papua New Guinea (Oceania), which also presented serious problems regarding the access to sanitation services. Thus, although we suggest other socioenvironmental factors to also be analyzed sanitation conditions proved to be an expressive determinant for the incidence of cholera in all regions worldwide.
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Many water sources in Nigeria are contaminated with pathogens. Several towns have witnessed outbreaks of enteric diseases due to poor hygienic standards of available drinking water. This research was undertaken to determine the spatiotemporal trends of waterborne diseases (WBDs) in Enugu, Nigeria using retrospective records from January 2013 to December 2016. A total of 18,495 individual reported cases of WBDs were analysed. The analysis showed an increasing temporal trend from 2013 to 2015, with a slight decrease in 2016. Typhoid fever had the highest frequency (48.9%) followed by diarrhoea (40%) and then dysentery (11.1%). The highest (88.9%) incidence of waterborne diseases per 10,000 peoples was from Enugu North followed by Enugu South (62.6%) and least was Enugu East (44.4%). Highest occurrence of typhoid fever and dysentery per 10,000 peoples was also found in Enugu North while Enugu East had the highest occurrence of diarrhoea in the four-yeartrends. WBDs were highest between January and March and least in July. The months with peak occurrence of WBDs falls within the dry season. The importance of having drinking water in both quality and quantity cannot be overestimated as portrayed in this study. Drinking water quality in Enugu urban is very poor especially during the dry season. This suggests a need for setting up a modality to tackle challenges of limited water supply during the dry seasons of the year and to educate the populace on household water treatment and storage method
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Introduction:Low serum magnesium levels in hospitalized patients, including those with cardiovascular ailments, have been reported by many studies. On the other hand, magnesium therapy is advocated but has not yet been conclusively proved. In our earlier study, an association between waterborne magnesium and hypomagnesemia in healthy subjects was reported. The present study was aimed at the contribution of waterborne magnesium among filtered and non-filtered water users in hospitalized patient. Methods:Present study was carried out at SMIMER, Surat. Ethical committee approval was taken. On informed consent, subjects from ICCU and general ward of Medicine unit were selected. Demographic and clinical information was collected. Serum magnesium, cardiac profile, and renal profile were analyzed. Patients with conditions such as kidney, liver, brain, and other critical illness were excluded. The results were expressed as Mean and SD, and appropriate statistical tools were applied to arrive at conclusions. Results:Among total 557 subjects including 185 healthy subjects, 93 ICCU and 279 non-ICCU patients, the incidence of hypomagnesemia (serum Mg < 1.7 mg/dl) was 18%, 36%, and 42% was observed respectively. A significant difference (p < 0.01) in serum magnesium between filtered and non-filtered water users in healthy (1.77 ± 0.36 vs 2.01 ± 0.48), ICCU (1.35 ± 0.44 vs 1.72 ± 0.55), and in non-ICCU patients (1.51 ± 0.59 vs 1.77 ± 0.51) was found. No significant difference was observed in other parameters. Conclusion:Significant hypomagnesaemia was observed among users of filtered water as compared to nonfiltered water users in all groups (ICCU, non-ICCU and healthy), strongly suggestive of contribution of waterborne magnesium in maintaining normal status in the population and inadequate levels may be correlated to a higher incidence of myocardial infarction as evident from the present study wherein a 42% prevalence of hypomagnesaemia in ICCU patients was found.
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Resumen Objetivo: Analizar el estado y la influencia de la variabilidad climática en la calidad del agua de un sistema de abastecimiento para consumo humano en San José, Costa Rica, captado en cuatro microcuencas del cantón Vásquez de Coronado, en el periodo 2017-2018, para brindar recomendaciones al operador y promover la protección de la población abastecida Métodos: Estudio descriptivo de los parámetros de calidad básicos de agua para consumo humano (Escherichia coli, coliformes fecales, turbidez, conductividad, pH, color, temperatura y cloro residual). Los análisis se realizaron siguiendo el Standard Methods for the Examination of Water and Wastewater. Se delimitaron las zonas de captación utilizando sistemas de información geográfica. Se utilizó estadística descriptiva e inferencial para describir la calidad del agua y su variabilidad espacial y estacional. Resultados: La concentración de coliformes fecales en el agua superficial fue > 103 NMP/100 mL y la turbidez >5 UTN en el 76% de las muestras. En la red de distribución se encontraron concentraciones de cloro residual y turbidez (>5 UTN) por encima de los límites recomendados para agua de consumo humano. Se encontró diferencias significativas en todos los parámetros básicos de calidad de agua entre las distintas zonas de captación (p<0,05 en todos los casos), así como entre épocas climáticas por zona de captación. Conclusión: Estos resultados indican que se está utilizando agua de calidad inadecuada para uso y consumo humano, por lo cual se recomienda un monitoreo intensivo y sectorizado de las fuentes para localizar puntos de contaminación.
Abstract Objective: Analyze the water quality and the influence of the climatic variability in supply system for the human consume in San José, Costa Rica, in four catchment areas in Vasquez of Coronado in the period 2017-2018 to give recommendations to the operator and promote the protection of the supplied population. Methods: Descriptive study of the basic parameters of the drinking water (Escherichia coli, fecal coliforms, turbidity, conductivity, pH, color, temperature, and residual chlorine). The analyses were done following Standard Methods for the examination of Water and Wastewater. The catchment areas were delimited using geographic information systems (GIS). Descriptive and inferential statistic was used to describe the water quality, spatial and seasonal variability. Results: The concentration of fecal coliforms in the catchment areas was >10 3 NMP/100 mL and the turbidity >5 UTN in 76% of the samples. In the distribution system were found concentrations of the residual chlorine and turbidity (>5 UTN) above according to recommended limits for drinking water in the country. The results showed significant differences in all of the basic parameters of the water quality between catchment areas (p<0, 05 in all cases) and between climatic periods for catchment areas. Conclusion: These results indicate that water of inadequate quality is being used for human use and consumption, for which reason intensive and sectorized source monitoring is recommended to locate contamination points.
Subject(s)
Water Supply/statistics & numerical data , Water Quality/standards , Water/analysis , Water Monitoring , Geographic Information Systems/instrumentation , Costa RicaABSTRACT
Resumen Este artículo pretende analizar la evolución de la mortalidad por enfermedades transmitidas por el agua durante el primer decenio del siglo XXI, por grupos de edades, comparando dos países del cono sur: Argentina y Brasil. Se estiman Años de Esperanza de Vida Perdidos (AEVP) por causa de muerte en base a la técnica descripta por Eduardo Arriaga. Para todas las estimaciones de defunción se utilizan promedios móviles para establecer dos períodos: 2000-2002 y 2009-2011. Se observa una tendencia general a la disminución de la mortalidad por enfermedades relacionadas con el agua, tanto en Argentina como en Brasil, con una velocidad de reducción promedio de los años de vida perdidos cercana al 1% anual. Esta reducción no es uniforme para todas las enfermedades relacionadas a este grupo de causas; de hecho existen causas que aumentan su mortalidad en el período estudiado, aunque en su mayoría se trata de brotes epidémicos. Por otro lado, el grupo de causas analizado impacta más en las edades más vulnerables: los menores de 1 año y los mayores de 50 años. Las intervenciones aisladas que se hacen sobre la higiene del agua, no logran por sí solas alcanzar los niveles de éxito deseado frente a este tipo de afecciones, que dependen de otros factores asociados a las condiciones de salud, la calidad de vida y la educación sanitaria.
Abstract This article aims at analyzing the evolution of mortality from waterborne diseases during the first decade of the 21st century, by age groups, comparing two countries of the southern cone: Argentina and Brazil. The method of years of potential life lost (YPLL) due to death, based on the technique described by Eduardo Arriaga, was used. For all death estimates, moving averages are used to establish two periods: 2000-2002 and 2009-2011. There is a general trend towards a reduction in mortality because of water-related diseases, both in Argentina and Brazil, with an average reduction rate of years of life lost close to 1% per year. This reduction is not uniform for all diseases related to this group of causes; in fact, there are causes that increase their mortality in the period studied, although most are epidemic outbreaks. On the other hand, the group of causes analyzed impacts more on the most vulnerable ages: those under 1 year old and those over 50 years old. The isolated interventions made on the hygiene of the water do not reach the levels of desired success by themselves considering this type of affections, that depend on other factors associated to the health conditions, the quality of life and the health education.
Subject(s)
Humans , Male , Female , Water Quality Control , Health Education , Disease Outbreaks , Mortality , Water Purification , Waterborne DiseasesABSTRACT
Objective: To determine the prevalence and risk factors of Giardia (G.) lamblia infections among the aboriginal community during the wet and dry seasons. Methods: A total of 473 stool samples from the aborigines in Temerloh, Pahang, Malaysia were collected during wet (n=256) and dry seasons (n=217). Smear of all the PVA-preserved stool samples were subjected to Trichrome staining and microscopic examination under 1 000 x magnification (Nikon eclipse E100) for the detection of G. lamblia. Positivity was recorded based on the presence of G. lamblia in trophozoite and/or cyst forms. Results: The prevalence of giardiasis was 12.10% and 8.29% during the wet and dry season, respectively. Age of less or equal to 15 years old and presence of other family members with G. lamblia infection were found to be the significant risk factors to acquire G. lamblia infections during both seasons. Untreated water supply was the significant risk factor of giardiasis during the dry season. This study highlighted the possibility of anthroponotic transmission of G. lamblia during both seasons and waterborne transmission during the dry season in the aboriginal community. Conclusions: This study suggests that seasonal variation plays an important role in the prevalence and risk factor of G. lamblia infection in the aboriginal community. Therefore, close contact with Giardia-infected family members and water-related activities or usage of untreated water must be avoided to reduce the burden of G. lamblia infection in this community.
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Introduction@#In April 2016, the Department of Health in Zamboanga Peninsula reported an increase in the number of acute gastroenteritis cases reported from Zamboanga City. An epidemiologic investigation was conducted to verify the existence of an outbreak, determine source/mode of transmission and recommend control measures.@*Methods@#A line list of cases was compiled from the 11 hospitals within Zamboanga City and a case-series study was conducted. Suspected cases were any persons from Zamboanga City who had three or more episodes of acute diarrhoea within 24 hours from 15 March to 29 May 2016. Confirmed cases were suspected cases with active symptoms during the investigation who had a stool sample collected with rotavirus detected. Water samples were also collected for viral detection.@*Results@#There were 2936 suspected cases with 22 deaths (case fatality rate: 0.75%), an age range of 8 days to 89 years (median: 2 years), with those aged less than 5 years the most affected age group (1903/2936, 65%). The majority were males (1549/2936, 53%). From the 138 active case patients included in the case-series study, the majority reported contact with a family member who had diarrhoea (89/138, 64%) and using water refilling stations as their major source of drinking water (88/134, 64%). Of the 93 stool specimens collected, 56 (60%) were positive for rotavirus. Five samples from water refilling stations where case patients reported collecting drinking water were all positive for rotavirus.@*Discussion@#Strict regulation of water refilling stations and boiling drinking water in households were implemented, immediately controlling the outbreak. After complying with all the requirements set by the Department of Health, a water safety certificate was awarded to Zamboanga City in September 2018.
ABSTRACT
Objective: To determine the prevalence and risk factors of Giardia (G.) lamblia infections among the aboriginal community during the wet and dry seasons. Methods: A total of 473 stool samples from the aborigines in Temerloh, Pahang, Malaysia were collected during wet (n=256) and dry seasons (n=217). Smear of all the PVA-preserved stool samples were subjected to Trichrome staining and microscopic examination under 1 000 x magnification (Nikon eclipse E100) for the detection of G. lamblia. Positivity was recorded based on the presence of G. lamblia in trophozoite and/or cyst forms. Results: The prevalence of giardiasis was 12.10% and 8.29% during the wet and dry season, respectively. Age of less or equal to 15 years old and presence of other family members with G. lamblia infection were found to be the significant risk factors to acquire G. lamblia infections during both seasons. Untreated water supply was the significant risk factor of giardiasis during the dry season. This study highlighted the possibility of anthroponotic transmission of G. lamblia during both seasons and waterborne transmission during the dry season in the aboriginal community. Conclusions: This study suggests that seasonal variation plays an important role in the prevalence and risk factor of G. lamblia infection in the aboriginal community. Therefore, close contact with Giardia-infected family members and water-related activities or usage of untreated water must be avoided to reduce the burden of G. lamblia infection in this community.
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OBJECTIVES: It was supposed to analyze status and affecting factors in water and food-borne communicable disease by screening entrants with diarrhea symptom at the point of entry in Korea METHODS: Symptomatic travelers with water and food-borne communicable diseases who entered Korea were diagnosed by a health declaration and detection of causative agents in water and food using laboratory tests. Among those entered in 2017, the affecting factors in the incidence of communicable diseases among those who had diarrhea at the entry into Korea, were analyzed, with frequency and chi-square test. RESULTS: The number of travel entrants with gastrointestinal communicable diseases increased by 40.19% from 2013 to 2017. The percentage of causative agents of water and food-borne communicable diseases was the highest at 69.2% from July to September. The rate of detection of causative agents of communicable disease pathogens in travelers from Southeast Asia entering Korea was 70.2%, which was higher than people arriving from East Asia and Central Asia (57.5%; p < 0.001). CONCLUSION: The positive ratio of causative agents of water and food-borne communicable diseases was high among travelers that had entered Korea from July to September, with a high number among entrants from Southeast Asia. Based on the positive detection of causative agents, the entry period and countries visited were statistically significant affecting factors (p < 0.001).