ABSTRACT
Introducción. El dengue es un problema de salud pública para el departamento de La Guajira. El control se ha enfocado en el vector con el uso de insecticidas, entre ellos los organofosforados. Objetivo. Evaluar el estado de la sensibilidad a insecticidas organofosforados de quince poblaciones de Aedes aegypti (L.) en el departamento de La Guajira, Colombia. Materiales y métodos. Se realizaron bioensayos para temefos, malatión y pirimifos- metil en larvas de tercer estadio y mosquitos adultos de Ae. aegypti en los municipios de Albania, Barrancas, Dibulla, Distracción, El Molino, Fonseca, Hatonuevo, La Jagua del Pilar, Maicao, Manaure, Riohacha, San Juan del Cesar, Uribia, Urumita y Villanueva, siguiendo la metodología de la Organización Mundial de la Salud (OMS) y la técnica de botellas usando la guía de los de los Centers for Disease Control and Prevention, respectivamente. Se determinó la sensibilidad por medio de la relación de resistencia a CL50 y CL95 (RRCL50, RRCL95) para temefos y a dosis y tiempo diagnóstico para temefos, malatión y pirimifos-metil en las poblaciones de campo evaluadas, usando como control la cepa sensible Rockefeller. Resultados. Las 15 poblaciones del departamento de La Guajira son sensibles a: temefos (relación de la resistencia a CL50<5,0; relación de resistencia a CL95<5,0; 98 a 100 % de mortalidad); pirimifos-metil (99 a 100 % de mortalidad) y malatión (100 % de mortalidad). Conclusión. Con base en los resultados obtenidos, es factible el uso de temefos, malatión y pirimifos-metil para el control de Ae. aegypti en las poblaciones evaluadas.
Introduction. Dengue is a public health problem in La Guajira region. Control has focused on the vector using insecticides, including organophosphates. Objective. To evaluate the state of susceptibility to organophosphates insecticides in fifteen Aedes aegypti (L.) populations in La Guajira, Colombia. Materials and methods. We collected samples of third-instar larvae and adult mosquitoes of Ae. aegypti in the municipalities of Albania, Barrancas, Dibulla, Distracción, El Molino, Fonseca, Hatonuevo, La Jagua del Pilar, Maicao, Manaure, Riohacha, San Juan del Cesar, Uribia, Urumita, Villanueva. Bioassays for temefos, malathion, and pirimiphos-methyl were carried out following the methodology of the World Health Organization, and the bottle technique using the guidance of the Centers for Disease Control and Prevention. Susceptibility to temefos was determined through the resistance ratio between lethal concentration 50 and lethal concentration 95; for the compounds temefos, malathion and pirimiphos-methyl, susceptibility was calculated using diagnostic dose and diagnostic time in the populations evaluated. Rockefeller susceptible strain was used as a control. Results. All evaluated populations of Ae. aegypti from La Guajira were found to be susceptible to temefos (ratio resistance to CL50<5.0; ratio resistance to CL95<5.0; 98 - 100 % mortality); pirimiphosmethyl (99 - 100 % mortality), and malathion (100 % mortality). Conclusion. Based on the results, the use of temefos, malathion, and pirimiphosmethyl is feasible for the control of Ae. aegypti in the evaluated populations.
Subject(s)
Aedes , Insecticides, Organophosphate , Temefos , Insecticide Resistance , Colombia , MalathionABSTRACT
ABSTRACT Aedes albopictus is considered a potential vector of arboviruses in Colombia. Females and males naturally infected with dengue, Zika and chikungunya viruses have already been found in this country. We document the first record of Ae. albopictus in the Cordoba department, in North of Colombia. The finding was carried out during Ae. aegypti collection activities in the Ayapel, Montelibano, Planeta Rica, Pueblo Nuevo and Puerto Libertador municipalities. The entomological material was collected in water containers such as cement water tanks, tanks, bottles, tires, abandoned toilets, and plastic lids with natural water located in the intradomicile, peridomicile, and extra-domicile spaces of the homes. We collected 658 Ae. albopictus samples in the larva and pupa stages, and once these reached adulthood, we determined that 389 were female and 269 were male. This is the first record of the presence of Ae. albopictus in the Cordoba department.
ABSTRACT
Introducción: La malaria es un problema de salud pública para Colombia, con comportamiento endémico/epidémico y variación entre las diferentes áreas de transmisión. Objetivo: Describir las características epidemiológicas de pacientes con malaria, notificados por un asegurador en salud en Colombia durante los años 2016 y 2017. Métodos: Estudio descriptivo, en el que se revisó de forma retrospectiva la base de datos de todos los casos de malaria notificados por un asegurador en salud en Colombia durante los años 2016 y 2017. Se realizó un análisis descriptivo, teniendo en cuenta la naturaleza de las variables. Las variables cualitativas se analizaron a partir de las frecuencias absolutas y relativas. Se usó el test de chi cuadrado para comparar las diferencias entre proporciones, en todos los casos se estableció un valor p< 0,05 como significativo. Los datos se analizaron en el programa SPSS versión 19. Resultados: Durante el período de observación se notificaron 26 017 casos de malaria; el 50 por ciento (13 014) eran hombres y el 50 por ciento (13 003) mujeres. Los grupos etarios más afectados fueron los adultos jóvenes (26,37 por ciento), escolares (15,04 por ciento), preescolares (12,75 por ciento) y adolescentes iniciales (12,18 por ciento). La mayoría de los pacientes estudiados eran indígenas y mulatos; trabajadores no calificados, que residían y fueron notificados en el departamento del Chocó. En cuanto a las características clínicas y paraclínicas se encontró que el 95,9 por ciento de los pacientes eran sintomático, las especies parasitaria más frecuentemente fueron P. falciparum (58,86 por ciento) y P. vivax (35,95 por ciento) y en menor frecuencia P. malariae (0,06 por ciento). Se registró complicaciones en 410 pacientes, estas eran principalmente de tipo hematológicas (56,3 por ciento); sin embargo, también se registraron complicaciones cerebrales, renales, hepáticas y pulmonares. Durante los dos años se observó brotes epidémicos entre las semanas 6 a la 31, y posteriormente se observó un descenso en la notificación de casos. Conclusiones: Este estudio encontró una marcada diferencia en la incidencia de casos de malaria notificados por el asegurador objeto de estudio entre los años 2016 y 2017; la mayoría de estos casos eran por P. falciparum y se registraron en el departamento de Chocó(AU)
Introduction: Malaria is a health problem in Colombia. Its behavior is endemic / epidemic and variation is observed between the different transmission areas. Objective: Describe the epidemiological characteristics of patients with malaria notified by a health insurer in Colombia during the years 2016 and 2017. Methods: A descriptive study was conducted in which a retrospective review was performed of the database of all the malaria cases notified by a health insurer in Colombia during the years 2016 and 2017. A descriptive analysis was done taking into account the nature of the variables. Qualitative variables were analyzed in terms of absolute and relative frequencies. The chi-square test was used to compare the differences between proportions. A value of p< 0.05 was set as significant in all cases. The software SPPS version 19 was used for data analysis. Results: During the observation period a total 26 017 malaria cases were notified, of whom 50 percent were men (13 014) and 50 percent were women (13 003). The most affected age groups were young adults (26.37 percent), schoolchildren (15.04 percent), pre-schoolers (12.75 percent) and preadolescents (12.18 percent). Most of the patients studied were indigenous and mulatto, unskilled workers, and lived or were notified in the department of Chocó. With respect to clinical and paraclinical characteristics, it was found that 95.9 percent of the patients were symptomatic. The most common parasite species were P. falciparum (58.86 percent) and P. vivax (35.95 percent) and to a lesser degree P. malariae (0.06 percent). Complications were recorded in 410 patients. These were mainly hematological (56.3 percent), but brain, kidney, liver and lung complications were also found. During the two study years, epidemic outbreaks were observed between weeks 6 and 31, followed by a decrease in the number of case notifications. Conclusions: The study found a marked difference in the incidence of malaria cases notified by the study insurer between the years 2016 and 2017. Most of these cases were due to P. falciparum and were recorded in the department of Chocó(AU)