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Search Results: 1 - 10 of 477776 matches for " María del Carmen Marquetti "
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Segregación de nicho de Aedes aegypti y Culex quinquefasciatus (Diptera: Culicidae) en condiciones de laboratorio
Leyva,Maureen; Marquetti,María del Carmen; Montada,Domingo;
Revista Cubana de Medicina Tropical , 2012,
Abstract: introduction: aedes and culex are two mosquito genuses of epidemiological importance, being aedes aegypti and culex quinquefasciatus the predominant ones in urban areas. it is common to find both of them associated in the same breeding sites where they share a lot of things despite the literature. objective: to determine if there is inter-specific competence between these two species when they co-exist in a single reservoir under lab conditions. methods: first staging larvae, which had been kept in the insect storage deposit of the vector control department, were used. the three bioassays used 2 000 ml, 1 000 ml and 500 ml of dechlorinated water. the larvae were daily fed on with 0.7 g of fish flour; temperature was 26 °c ± 2 °c. results: the larval cycle for aedes aegypti was 6 days in crossbreds and in controls whereas it was 8 days for culex quinquefasciatus, regardless of variation in the number of individuals of each species and in each bioassay. the larvae of each species completely developed since food was always provided and the living space remained the same. it should be noticed that the water was not totally translucent but no pollution indicators were observed. the sexual index for each species was determined after adult vectors emerged, with 1:1 ratio for both sexes approximately. conclusions: under lab conditions, these species did not compete one against the other for either food or living space and there was segregation of niche that favored their co-existence.
Composición química y efecto letal del aceite esencial de Pimenta racemosa (Myrtales: Myrtaceae) sobre Blattella germanica (Dictyoptera: Blattellidae)
Leyva,Maureen; Tacoronte,Juan E.; Marquetti,María del Carmen;
Revista Cubana de Medicina Tropical , 2007,
Abstract: gas chromatography test and gas chromatography/mass spectrometry test allowed examining the essential oil from pimenta racemosa leaves (mill.) j.w. moore (myrtales: myrtaceae). a total of 26 volatile compounds representing 99.5 % of the whole composition were identified, being ternipen 4-ol and 1,8 cineol those having the largest portions. lab bioassays were performed with 5 different oil doses on blattella germanica. dl50=15.55 and dl95=48.16 % were estimated by a probit-log analysis as well as diagnostic dose of 2 μg/insect of 50 % oil that is recommended for field surveillance of the use of various formulations in insect control programs.
Tipificación de hábitats de Aedes albopictus en Cuba y su asociación con otras especies de culícidos, 1995-1998
Marquetti,María del Carmen; Valdés,Vivian; Aguilera,Lucita;
Revista Cubana de Medicina Tropical , 2000,
Abstract: a typing of the habitats of aedes albopictus in cuba was made after its detection in 1995. it was observed in suburban areas of the boyeros municipality, in havana city, where a study was conducted from october, l995, to july, 1998. most of the positive repositories were found outside the houses. tins, tires, trees and plants were the places preferred for its breeding. it was found in the breeding places associated with aedes mediovittatus and culex quinquefasciatus, dominant species in these places. it was also observed a trend towards an increase of the number of repositories colonized only by the species under study. reference was made to the phenomenon of competence between this species and the indigenous species present in such places.
Segregación de nicho de Aedes aegypti y Culex quinquefasciatus (Diptera: Culicidae) en condiciones de laboratorio Segregation of Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) niche under laboratory conditions
Maureen Leyva,María del Carmen Marquetti,Domingo Montada
Revista Cubana de Medicina Tropical , 2012,
Abstract: Introducción: Aedes y Culex constituyen 2 géneros de mosquitos de importancia epidemiológica, destacándose en las zonas urbanas las especies Aedes aegypti y Culex quinquefasciatus. Es común encontrarlas asociadas en los mismos criaderos compartiendo un gran número de recursos a pesar de lo descrito en la literatura. Objetivo: determinar si existe competencia ínterespecífica entre estas 2 especies cuando coexisten en un mismo recipiente en condiciones de laboratorio. Métodos: se utilizaron larvas de primer estadio, mantenidas en el insectario del Departamento de Control de Vectores. Se hicieron 3 bioensayos con volúmenes de 2 000 mL, 1 000 mL y 500 mL de agua declorinada. Las larvas fueron alimentadas a diario con 0,7 g de harina de pescado, la temperatura se mantuvo de 26 °C ± 2 °C. Resultados: el ciclo larval para Aedes aegypti fue de 6 d tanto en las mezclas como en los controles, mientras que para Culex quinquefasciatus fue de 8 d, lo cual ocurrió independiente de la variación en el número de cada especie y en cada bioensayo. Las larvas de cada especie se desarrollaron totalmente al no escasear el alimento y al permanecer constante el espacio habitacional, es válido mencionar que el agua no estuvo del todo traslúcida ni tuvo indicadores de polución. El índice sexual para cada especie se determinó al emerger los adultos y se mantuvo próximo a 1:1 para los 2 sexos. Conclusiones: estas especies en condiciones de laboratorio no compitieron por el espacio ni por el alimento y ocurrió una segregación de nicho que favorece su coexistencia. Introduction: Aedes and Culex are two mosquito genuses of epidemiological importance, being Aedes aegypti and Culex quinquefasciatus the predominant ones in urban areas. It is common to find both of them associated in the same breeding sites where they share a lot of things despite the literature. Objective: to determine if there is inter-specific competence between these two species when they co-exist in a single reservoir under lab conditions. Methods: first staging larvae, which had been kept in the insect storage deposit of the Vector Control Department, were used. The three bioassays used 2 000 mL, 1 000 mL and 500 mL of dechlorinated water. The larvae were daily fed on with 0.7 g of fish flour; temperature was 26 °C ± 2 °C. Results: the larval cycle for Aedes aegypti was 6 days in crossbreds and in controls whereas it was 8 days for Culex quinquefasciatus, regardless of variation in the number of individuals of each species and in each bioassay. The larvae of each species completely developed since food was always p
Tipificación de hábitats de Aedes albopictus en Cuba y su asociación con otras especies de culícidos, 1995-1998
María del Carmen Marquetti,Vivian Valdés,Lucita Aguilera
Revista Cubana de Medicina Tropical , 2000,
Abstract: Se hizo una tipificación de hábitats de Aedes albopictus en Cuba después de su detección en 1995. Se destacó su presencia en zonas suburbanas del municipio Boyeros en Ciudad de La Habana donde se realizó el estudio desde octubre de 1995 hasta julio de 1998. La mayor cantidad de depósitos positivos se encontraron en los exteriores de las viviendas; las latas, gomas, árboles y plantas resultaron los preferidos para su cría. Se encontró asociado en los criaderos con Aedes mediovittatus y Culex quinquefasciatus, especies dominantes en el lugar y una tendencia a un aumento en el número de depósitos colonizados solamente por la especie estudiada. Se hizo referencia al fenómeno de competencia entre esta especie y las especies nativas presentes en el lugar. A typing of the habitats of Aedes albopictus in Cuba was made after its detection in 1995. It was observed in suburban areas of the Boyeros Municipality, in Havana City, where a study was conducted from October, l995, to July, 1998. Most of the positive repositories were found outside the houses. Tins, tires, trees and plants were the places preferred for its breeding. It was found in the breeding places associated with Aedes mediovittatus and Culex quinquefasciatus, dominant species in these places. It was also observed a trend towards an increase of the number of repositories colonized only by the species under study. Reference was made to the phenomenon of competence between this species and the indigenous species present in such places.
Composición química y efecto letal del aceite esencial de Pimenta racemosa (Myrtales: Myrtaceae) sobre Blattella germanica (Dictyoptera: Blattellidae) Chemical composition and lethal effect of essential oil from Pimenta racemosa (Myrtales: Myrtaceae) on Blatella germanica (Dictyoptera: Blattellidae)
Maureen Leyva,Juan E. Tacoronte,María del Carmen Marquetti
Revista Cubana de Medicina Tropical , 2007,
Abstract: Se examinó mediante un análisis GC y GC-MS (cromatografía gaseosa-espectrometría de masa), el aceite esencial extraído de hojas de Pimenta racemosa (Mill.) J.W. Moore (Myrtales: Myrtaceae). Se identificaron un total de 26 compuestos volátiles que representaron 99,5 % de la composición total; los de mayor proporción resultaron el terpinen-4-ol y 1,8-cineol. Se realizaron bioensayos al nivel de laboratorio con 5 dosificaciones de este aceite sobre la cucaracha Blattella germanica, se encontraron valores de DL50= 15,55 % y DL95= 48,16 % mediante un análisis probit-log, así como una dosis diagnóstica de 2 μg/insecto del aceite a 50 %, que se propone para la vigilancia en el terreno del uso de formulaciones en programas de lucha contra este insecto. Gas chromatography test and Gas chromatography/mass spectrometry test allowed examining the essential oil from Pimenta racemosa leaves (Mill.) J.W. Moore (Myrtales: Myrtaceae). A total of 26 volatile compounds representing 99.5 % of the whole composition were identified, being ternipen 4-ol and 1,8 cineol those having the largest portions. Lab bioassays were performed with 5 different oil doses on Blattella germanica. DL50=15.55 and DL95=48.16 % were estimated by a probit-log analysis as well as diagnostic dose of 2 μg/insect of 50 % oil that is recommended for field surveillance of the use of various formulations in insect control programs.
Comportamiento estacional y temporal de Aedes aegypti y Aedes albopictus en La Habana, Cuba
Marquetti,María del Carmen; Bisset,Juan; Leyva,Maureen; García,Aimara; Rodríguez,Magdalena;
Revista Cubana de Medicina Tropical , 2008,
Abstract: objectives: because of the permanence of aedes albopictus in the urban and peri-urban ecosystems of various municipalities after the introduction of this vector in cuba in 1995, as well as the presence of residual populations of aedes aegypti, seasonal and spatial behaviour of both species was evaluated in a municipality of the city of havana. methods: all the facilities located in lisa municipality were inspected from january to december 2006 in which all kinds of water storage containers as well as natural breeding sites and larvitraps, a device for dengue vector surveillance, were surveyed. results: the ecological plasticity of aedes aegypti was demonstrated, being mainly present in water storage tanks indoors and opened cans whereas aedes albopictus prevailed in opened cans and water-filled tyres. the highest number of containers positive to both species was found from july to september during the rainy season in cuba. in spite of the fact that aedes aegypti was spread throughout the municipality, it was less predominant in rural areas than aedes albopictus which in turn was less prevalent in containers. conclusions: although direct control actions against aedes aegypti are permanently taken in cuba, which leads to lower population densities of the species, aedes albopictus has not been able to move the former away from its regular breeding sites.
Comportamiento estacional y temporal de Aedes aegypti y Aedes albopictus en La Habana, Cuba Seasonal and spatial behaviour of Aedes aegypti and Aedes albopictus in the City of Havana, Cuba
María del Carmen Marquetti,Juan Bisset,Maureen Leyva,Aimara García
Revista Cubana de Medicina Tropical , 2008,
Abstract: OBJETIVOS: por causa de la permanencia de Aedes albopictus en el ecosistema urbano y periurbano de varios municipios, después de su introducción en Cuba en 1995, así como la presencia de poblaciones residuales de Aedes aegypti, se evaluó el comportamiento temporal y espacial de ambas especies en un municipio de Ciudad de La Habana. MéTODOS: se realizó la inspección de todos los locales del municipio Lisa durante enero-diciembre de 2006, se revisó todo tipo de depósitos con agua así como los criaderos naturales y las larvitrampas, dispositivo utilizado en la vigilancia del vector del dengue. RESULTADOS: se demostró la plasticidad ecológica de Aedes aegypti destacándose su presencia en los tanques bajos y las latas, mientras que Aedes albopictus prevaleció en las latas y las gomas. El mayor número de recipientes positivos para ambas especies se encontró en los meses julio-septiembre, perteneciente a la estación lluviosa en Cuba. Se evidenció una distribución alopátrica entre ambas especies; porque a pesar de estar Aedes aegypti distribuido en todo el municipio, su presencia fue menor en las áreas rurales donde predominó Aedes albopictus; aunque este último se mantuvo durante todo el a o con baja positividad en los recipientes. CONCLUSIONES: a pesar de las actividades directas de control contra Aedes aegypti que se desarrollan en Cuba de manera permanente, las cuales hacen que prevalezcan bajas densidades de la especie, Aedes albopictus no la ha desplazado de sus sitios de cría habituales. OBJECTIVES: Because of the permanence of Aedes albopictus in the urban and peri-urban ecosystems of various municipalities after the introduction of this vector in Cuba in 1995, as well as the presence of residual populations of Aedes aegypti, seasonal and spatial behaviour of both species was evaluated in a municipality of the City of Havana. METHODS: All the facilities located in Lisa municipality were inspected from January to December 2006 in which all kinds of water storage containers as well as natural breeding sites and larvitraps, a device for dengue vector surveillance, were surveyed. RESULTS: The ecological plasticity of Aedes aegypti was demonstrated, being mainly present in water storage tanks indoors and opened cans whereas Aedes albopictus prevailed in opened cans and water-filled tyres. The highest number of containers positive to both species was found from July to September during the rainy season in Cuba. In spite of the fact that Aedes aegypti was spread throughout the municipality, it was less predominant in rural areas than Aedes albopictus which in
Factores de riesgo de infestación pupal con Aedes aegypti dependientes de la comunidad en un municipio de Ciudad de La Habana
Marquetti,María del Carmen; Bisset,Juan; Portillo,Reina; Rodríguez,Magdalena; Leyva,Maureen;
Revista Cubana de Medicina Tropical , 2007,
Abstract: the risk factors of pupal infestation with community-based aedes aegypti were identified in four areas of playa municipality, located in the urban zone of havana city. the deposits with the highest positivity to the vector were the artificial ones and the low tanks. it was confirmed that 99.03 % of the sites visited contained at least one deposit with water, and that 4 areas presented a very similar behaviour in ratio of tanks per site, since in all of them the water was supplied every other day. that is why the difference in the positivity was not due to factors related to the water supply. of the positive deposits, 87.17 % were located in backyards, and 91.3 % of the positive low tanks had no cover, or were partially covered. it was found that in the positivity of the deposits to the dengue vector, only 8.7 % were non-community dependent. if there had had an active participation of the community directed to cover the tanks, to change the water in the water troughs, and to clean the backyards, the pupal infestation due to aedes aegypti would have drastically increased in the studied areas.
Incidencia de culícidos en una zona urbana de Ciudad de La Habana durante 1995
Marquetti,María del Carmen; Nú?ez,Nury; Aguilera,Lucita; Fuentes,Omar; Navarro,Agustín;
Revista Cubana de Medicina Tropical , 1998,
Abstract: in the present paper it is made an analysis of the incidence of culicides in the municipality of marianao, havana city, during 1995, after following the requirements of the national program for the erradication of aedes aegypti. 6 species of mosquitoes were found in the municipality, with a predominance of the culex quinquefasciatus and aedes mediovittatys species. 4 focuses of aedes aegypti were detected during this period. it was found that the groups of deposits preferred by the culicides for their breeding in this municipality were other deposits, low tanks, artificial deposits and larva traps. the people′s councils 4 and 5 (libertad and pogolotti) had the highest number of focuses (967 and 1 240, respectively, and therefore, they need more attention. it is analyzed the influence of the deficiences of the public services, such as the collection of solid, wastes (garbage) and the existance of leakages and sewing overflows, on the proliferation of mosquitoes in the municipality.
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