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Malaysia Mosquito Autocidal Trap (MyMAT) is a green technology Aedes mosquito trap that does not use harmful chemical substances. This study aimed to evaluate the efficiency of MyMAT in reducing dengue cases and relating the cases to rainfall. An experimental field study was conducted for 42 weeks at Pangsapuri Nilam Sari, Shah Alam, Selangor. A total of 624 MyMAT was allocated at four blocks: inside each apartment and outside at the corridors in each level. Mosquito and rainfall data were collected weekly using MyMAT and a mobile rain gauge, respectively. The dengue cases data was retrieved from the e-dengue system obtained from the Malaysia Ministry of Health. The findings showed that MyMAT could catch 97% of Aedes mosquitoes and reduced dengue cases on average of 78%, indicating MyMAT is a reliable Aedes mosquito trap. Interestingly the findings also revealed a significant relationship between dengue cases, the number of Aedes mosquitoes, and rainfall. This week notified dengue cases increased when last two weeks mosquitoes increased due to previous two weeks rainfall increment. Thus indicating an indirect but significant relationship between this week notified dengue cases with the last four weeks rainfall. These relationships can be used in establishing a dengue outbreak forecasting model, which can act as an early warning system.
ABSTRACT
Introducción: La vigilancia del síndrome febril inespecífico es una estrategia para la identificación temprana de enfermedades de interés en salud pública y de otras enfermedades no diagnosticadas usualmente. Objetivo: Determinar las características epidemiológicas del síndrome febril inespecífico. Métodos: Estudio descriptivo-transversal en pacientes con diagnóstico inicial de síndrome febril inespecífico en el municipio Nueva Paz, Mayabeque, en el período enero-diciembre, 2018. El universo estuvo constituido por 828 casos. Los datos obtenidos de la Unidad Municipal de Higiene y la base de datos de arbovirosis se vaciaron en una planilla creada al efecto. Las variables cuantitativas se resumieron mediante media aritmética y desviación estándar y las variables cualitativas mediante porcentajes. La comparación de proporciones se realizó a través de chi-cuadrado y dócima de Duncan, con un nivel de significación para p < 0,05. Resultados: Predominó el sexo femenino (55,08 por ciento) y la edad menor de 18 años (33,93 por ciento). Se encontró mayor número de focos en el área de salud de Los Palos (53,44 por ciento), donde se reportó más cantidad de síndrome febril inespecífico (50,60 por ciento). Los meses de mayo, julio y octubre notificaron mayor número de focos. La vigilancia se comportó en 61,7 por ciento con una reactividad en 56,50 por ciento. El 48,06 por ciento de los casos clasificaron dengue. Conclusiones: El incumplimiento de los programas de control del vector, la urbanización no planificada, el crecimiento acelerado de la población y la existencia de una infraestructura de salud deficiente ha permitido que proliferen las arbovirosis a gran escala en el municipio Nueva Paz(AU)
Introduction: Surveillance of nonspecific febrile syndrome is a strategy for early identification of public health concern diseases as well as other diseases not usually diagnosed. Objective: To determine the epidemiological characteristics of nonspecific febrile syndrome. Methods: Descriptive and cross-sectional study carried put, in the period January-December 2018, in patients with an initial diagnosis of nonspecific febrile syndrome from Nueva Paz Municipality, Mayabeque Province. The universe consisted of 828 cases. The data obtained from the Municipal Unit of Hygiene and Epidemiology as well as from the arbovirus diseases database were emptied into a form created for this purpose. Quantitative variables were summarized using arithmetic mean and standard deviation, while qualitative variables were summarized using percentages. The comparison of proportions was made through chi-square and Duncan's tests, with a level of significance P<0.05. Results: There was a predominance of the female sex (55.08 percent) and ages under eighteen years (33.93 percent). A greater number of focuses were found in the health area of Los Palos (53.44 percent), where a greater amount of nonspecific febrile syndrome was reported (50.60 percent). The months of May, July and October accounted for higher numbers of outbreaks. Surveillance was 61.7 percent with reactivity at 56.50 percent, 48.06 percent of the cases classified as dengue. Conclusions: Failure to comply with vector control programs, unplanned urban planning, accelerated population growth and the existence of a deficient health infrastructure have allowed great-scale arbovirus infections to proliferate in Nueva Paz Municipality(AU)
Subject(s)
Humans , Male , Female , Arbovirus Infections/diagnosis , Seizures, Febrile/epidemiology , Epidemiological Monitoring , Epidemiology, Descriptive , Cross-Sectional StudiesABSTRACT
Background & objectives: Dengue is a major health problem in many parts of India and its neighbouring countries. Dengue cases have not been reported from Manipur, a northeastern State of India till 2007. But, the sudden outbreak of fever with febrile illness during 2007 and 2008, suspected to be dengue/dengue haemorrhagic fever was investigated to detect the causative agent. Potential impact of climatic variables on dengue transmission has been documented and hence the association between climatic factors, entomological parameters and dengue cases was also analysed. Methods: Forty two and 16 blood samples were collected from patients suspected to have dengue infection in the year 2007 and 2008, respectively. Viral RNA was extracted from serum samples and subjected to multiplex one step RT-PCR assay. Dengue specific amplicons were sequenced and phylogenetic analysis was carried out. Multiyear trend analysis and ‘t’ test were performed for the comparison of different meteorological variables between the years 2000-2004 and 2005-2008. Results: The aetiological agent was found to be DENV-2 and the phylogenetic analysis showed that the isolate was similar to that of Cambodian isolate. There was a significant difference in minimum temperature (P<0.05), Relative humidity - morning hours (P<0.001), relative humanity - afternoon hours (P<0.01) and cumulative precipitation (P< 0.05) between the years 2000-2004 and 2005-2008. Interpretation & conclusions: The sudden outbreak of dengue fever in Manipur State occurred was possibly due to the increased temperature, relative humidity and decrease in cumulative precipitation. These climatic factors would have contributed to the Aedes mosquito abundance and increased virus transmission. Proper diseases surveillance system integrated with meteorological warning system and management of vector breeding sites will prevent such outbreaks in future.