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41 resultados encontrados para: TEMA: Aedes aegypti
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1.
Artículo
Comparación de Novaluron, Piriproxifeno, Spinosad y Temefos como larvicidas contra Aedes aegypti en Chiapas, México
Marina Fernández, Carlos Félix (autor) ; Bond Compeán, Juan Guillermo (autor) ; Muñoz, José (autor) ; Valle Mora, Javier Francisco (autor) ; Quiroz Martínez, Humberto (autor) ; Torres Monzón, Jorge Aurelio (autor) ; Williams, Trevor (autor) ;
Disponible en línea
Contenido en: Salud Pública de México Volumen 62, número 4 (julio-agosto de 2020), p. 424-431 ISSN: 0036-3634
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Resumen en: Español | Inglés |
Resumen en español

Objetivo. Comparar la eficacia de tres larvicidas modernos para el control de Aedes aegypti en tanques de agua doméstica en Chiapas. Material y métodos. Se comparó la eficacia de piriproxifeno, novalurón, dos formulaciones de spinosad (gránulos y tabletas) y temefos en ovitrampas y tanques domésticos de agua. Resultados. El piriproxifeno y el temefos proporcionaron de 2 a 3 semanas de control de larvas en ovitrampas, mientras que los gránulos de spinosad y novaluron proporcionaron de 7 a12 semanas. Los tanques de agua tratados produjeron una reducción significativa en la oviposición por Ae. aegypti en las casas (p<0.001). Se encontró gran cantidad de larvas en los tanques tratados con temefos y piriproxifeno en comparación con los tratados con novaluron y tabletas de spinosad durante la mayor parte del estudio. Conclusión. Las formulaciones de spinosad en tabletas y novaluron fueron larvicidas efectivos en esta región. El bajo desempeño de temefos puede indicar una susceptibilidad reducida en poblaciones de Ae. aegypti en Chiapas.

Resumen en inglés

Objective. To compare the efficacy of three modern larvicides with the organophosphate temephos for control of Aedes aegypti in water tanks in Chiapas. Materials and methods. Trials were performed to compare the efficacy of pyriproxyfen, novaluron, two formulations of spinosad (granules and tablets) and temephos in oviposition traps and domestic water tanks. Results. Pyriproxyfen and temephos provided 2-3 weeks of complete control of larvae in oviposition traps, whereas spinosad granules and novaluron provided 7-12 weeks of control. Treatment of water tanks resulted in a significant reduction in oviposition by Ae. aegypti in houses (p<0.001). Higher numbers of larvae were present in temephos and pyriproxyfen-treated water tanks compared to novaluron and spinosad tablet treatments during most of the study. Conclusion. Spinosad formulations and novaluron were effective larvicides in this region. The poor performance of temephos may be indicative of reduced susceptibility in Ae. aegypti populations in Chiapas.


2.
Artículo
Desarrollo oogénico y ciclo gonotrófico de Aedes aegypti y Aedes albopictus en laboratorio
Casas Martínez, Mauricio (autor) ; Tamayo Domínguez, Rodrigo (autor) ; Bond Compeán, Juan Guillermo (autor) ; Rojas, Julio C. (autor) ; Weber, Manuel (autor) ; Ulloa García, Armando (autor) ;
Disponible en línea
Contenido en: Salud Pública de México Volumen 62, número 4 (julio-agosto de 2020), p. 372-378 ISSN: 0036-3634
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Resumen en: Español | Inglés |
Resumen en español

Objetivo. Determinar el tiempo de desarrollo oogénico y del ciclo gonotrófico de Aedes aegypti y Aedes albopictus en laboratorio. Material y métodos. Hembras de Ae. aegypti y Ae. albopictus alimentadas con sangre fueron disecadas cada cuatro horas para determinar el estado de desarrollo folicular, según los estadios de Christophers. Resultados. El tiempo mínimo de maduración del oocito en Ae. aegypti y Ae. albopictus fue de 64-82 h y 52-64 h post-alimentación, respectivamente. El ciclo gonotrófico de Ae. aegypti (3.7-4.2 d) fue mayor que el de Ae. albopictus (3.2-3.7 d). La longitud folicular presentó diferencias significativas entre las especies en los estadios de Christophers 2” y 5, mientras que la amplitud folicular fue diferente entre ambos mosquitos en los estadios 2”, 3 y 4. Conclusiones. El estudio proporcionó nueva evidencia sobre la estrategia reproductiva de las hembras de Ae. aegypti y Ae. albopictus que coexisten en la región neotropical de México.

Resumen en inglés

Objective. To determine the time of oogenic development and the length of the gonotrophic cycle of Ae. aegypti and Ae. albopictus in laboratory. Materials and methods. Bloodfed females of Ae. aegypti and Ae. albopictus were dissected every 4 h to determine the development status of the follicles according to the Christophers’ stages. Results. The minimum time of oocyte maturation in Ae. aegypti and Ae. albopictus was 64-82 h and 52-64 h post-feeding, respectively. We found that the gonotrophic cycle of Ae. aegypti (3.7-4.2 d) is longer than that of Ae. albopictus (3.2-3.7 d). The follicle length showed significant differences between species at Christophers’ stages 2” and 5, whereas follicle amplitude was different between the two mosquitoes at stages 2”, 3 and 4. Conclusions. The study provided new evidence on the reproductive strategies of Ae. aegypti and Ae. albopictus females that coexist in the Neotropical region of Mexico.


3.
Tesis - Maestría
Resumen en español

La aplicación de la técnica del insecto estéril (TIE) como método de control contra vectores de enfermedades en humanos es una novedosa estrategia por ser amigable con el ambiente. Debido a que las hembras de mosquitos son insectos de hábitos hematófagos, la TIE se ve seriamente limitada por esta condición, ya que su liberación representaría un riesgo de salud por el aumento de la capacidad vectorial. El objetivo de esta investigación fue, primero hacer una revisión exhaustiva sobre la separación sexual en mosquitos del género Aedes spp. para la aplicación de la TIE. Se revisaron 136 documentos (libros, capítulos de libros y artículos científicos), donde se ha documentado la identificación de mutaciones basadas en genes que expresan un fenotipo visible y con potencial para el desarrollo de una cepa de sexado genético (CSG). Posteriormente se realizó el aislamiento de mutantes basados en el color del cuerpo de larvas en poblaciones silvestres y de cría de Aedes aegypti y Ae. albopictus para el desarrollo de CSG de estas especies. Se describieron para Ae. aegypti cuatro mutantes, denominados negro, café, blanco y colmillos; y para Ae. albopictus fueron cinco mutantes, negro, café, blanco, gold y cebra. Los denominados colmillos y cebra son dos nuevos mutantes. Las mutaciones con mayor frecuencia fueron larvas de cuerpo negro, seguidas de las de cuerpo café. Los mutantes blanco, gold, cebra y colmillos, se presentaron en una frecuencia mucho menor. El análisis de correspondencia múltiple (ACM) confirmó la asociación entre las variables de color del mutante, especie y localidad, que se encuentran fuertemente influenciados por las fechas de colecta. También se observó que algunos mutantes fueron más frecuentes en una especie, en una localidad o en una época de colecta.

Índice

Resumen
Capítulo I. Introducción general
Capítulo II. Sex separation of Aedes spp. mosquitoes for Sterile Insect Technique application: A review
Capítulo III. Identificación de mutantes en poblaciones silvestres y de laboratorio de Aedes aegypti y Ae. albopictus
Capítulo IV. Conclusiones
Literatura citada
Anexos
Comprobante de envío del artículo a la revista Entomologia experimentalis et applicata


4.
Artículo
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Resumen en: Inglés |
Resumen en inglés

Insect β-1,3-glucanases belong to Glycoside Hydrolase Family 16 (GHF16) and are involved in digestion of detritus and plant hemicellulose. In this work, we investigated the role of GHF16 genes in Aedes aegypti larvae, due to their detritivore diet. Aedes aegypti genome has six genes belonging to GHF16 (Aae GH16.1 – Aae GH16.6), containing two to six exons. Sequence analysis suggests that five of these GHF16 sequences (Aae GH16.1, 2, 3, 5, and 6) contain the conserved catalytic residues of this family and correspond to glucanases. All genomes of Nematocera analyzed showed putative gene duplications corresponding to these sequences. Aae GH16.4 has no conserved catalytic residues and is probably a β-1,3-glucan binding protein involved in the activation of innate immune responses. Additionally, Ae. aegypti larvae contain significant β-1,3-glucanase activities in the head, gut and rest of body. These activities have optimum pH about 5–6 and molecular masses between 41 and 150 kDa. All GHF16 genes above showed different levels of expression in the larval head, gut or rest ofthebody. Knock-down of AeGH16.5 resulted in survival and pupation rates lower than controls (dsGFP and water treated). However, under stress conditions, severe mortalities were observed in AeGH16.1 and AeGH16.6 knocked-down larvae. Enzymatic assays of β-1,3-glucanase in AeGH16.5 silenced larvae exhibited lower activity in the gut and no change in the rest of the body. Chromatographic activity profiles from gut samples after GH16.5 silencing showed suppression of enzymatic activity, suggesting that this gene codes for the digestive larval β-1,3-glucanase of Ae. aegypti. This gene and enzyme are attractive targets for new control strategies, based on the impairment of normal gut physiology.


5.
Artículo
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New record of aedes albopictus in a suburban area of Merida, Yucatan, Mexico
Contreras Perera, Yamili J. (autora) ; Briceño Méndez, Marcos Alberto (autor) ; Flores Suárez, Adriana Elizabeth (autora) ; Manrique Saide, Pablo Camilo (autor) ; Palacio Vargas, Jorge A. (autor) ; Huerta Jiménez, Herón (autor) ; Martin Park, Abdiel (autor) ;
Contenido en: Journal of the American Mosquito Control Association Vol. 35, no. 3 (September 2019), p. 210–213 ISSN: 1943-6270
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Resumen en: Inglés |
Resumen en inglés

A survey was carried out in 51 households within a suburban area of Merida, Yucatan, Mexico, for 5 consecutive days. Adult collections were performed using Prokopack aspirators (indoors) and human-landing mosquito catches (HLC) outdoors, and larval sites (artificial containers) were revised for larvae collection. A total of 259 Aedes albopictus were collected, 246 from artificial larval sites, 8 by indoor aspiration, and 5 by HLC. This isthe first record of Ae. albopictusin Merida, Yucatan, Mexico.


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Resumen en: Inglés |
Resumen en inglés

The sterile insect technique (SIT) may offer a means to control the transmission of mosquito borne diseases. SIT involves the release of male insects that have been sterilized by exposure to ionizing radiation. We determined the effects of different doses of radiation on the survival and reproductive capacity of local strains of Aedes aegypti and Ae. albopictus in southern Mexico. The survival of irradiated pupae was invariably greater than 90% and did not differ significantly in either sex for either species. Irradiation had no significant adverse effects on the flight ability (capacity to fly out of a test device) of male mosquitoes, which consistently exceeded 91% in Ae. aegypti and 96% in Ae. albopictus. The average number of eggs laid per female was significantly reduced in Ae. aegypti at doses of 15 and 30 Gy and no eggs were laid by females that had been exposed to 50 Gy. Similarly, in Ae. albopictus, egg production was reduced at doses of 15 and 25 Gy and was eliminated at 35 Gy. In Ae. aegypti, fertility in males was eliminated at 70 Gy and was eliminated at 30 Gy in females, whereas in Ae. albopictus, the fertility of males that mated with untreated females was almost zero (0.1%) in the 50 Gy treatment and female fertility was eliminated at 35 Gy. Irradiation treatments resulted in reduced ovary length and fewer follicles in both species. The adult median survival time of both species was reduced by irradiation in a dose-dependent manner. However, sterilizing doses of 35 Gy and 50 Gy resulted in little reduction in survival times of males of Ae. albopictus and Ae. aegypti, respectively, indicating that these doses should be suitable for future evaluations of SIT-based control of these species. The results of the present study will be applied to studies of male sexual competitiveness and to stepwise evaluations of the sterile insect technique for population suppression of these vectors in Mexico.


7.
Artículo
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Efficacy of larvicides for the control of dengue, Zika, and chikungunya vectors in an urban cemetery in southern Mexico
Marina Fernández, Carlos Félix ; Bond Compeán, Juan Guillermo (coaut.) ; Muñoz, José (coaut.) ; Valle Mora, Javier Francisco (coaut.) ; Quiroz Martínez, Humberto (coaut.) ; Torres Monzón, Jorge Aurelio (coaut.) ; Williams, Trevor (coaut.) ;
Contenido en: Parasitology Research Vol. 117, no. 6 (June 2018), p. 1941–1952 ISSN: 0932-0113
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Resumen en: Inglés |
Resumen en inglés

Many countries in Latin America have recently experienced outbreaks of Zika and chikungunya fever, in additional to the usual burden imposed by dengue, all of which are transmitted by Aedes aegypti in this region. To identify potential larvicides, we determined the toxicity of eight modern insecticides to A. aegypti larvae from a colony that originated from field-collected insects in southern Mexico. The most toxic compounds were pyriproxyfen (which prevented adult emergence) and λ-cyhalothrin, followed by spinetoram, imidacloprid, thiamethoxam, and acetamiprid, with chlorantraniliprole and spiromesifen the least toxic products. Field trails performed in an urban cemetery during a chikungunya epidemic revealed that insecticide-treated ovitraps were completely protected from the presence of Aedes larvae and pupae for 6 and 7 weeks in spinosad (Natular G30) and λ- cyhalothrin-treated traps in both seasons, respectively, compared to 5–6 weeks for temephos granule-treated ovitraps, but was variable for pyriproxyfen-treated ovitraps with and 1 and 5 weeks of absolute control in the dry and rainy seasons, respectively. Insecticide treatments influenced the mean numbers of Aedes larvae + pupae in each ovitrap, mean numbers of eggs laid, and percentage of egg hatch over time in both trials. The dominant species was A. aegypti in both seasons, although the invasive vector Aedes albopictus was more prevalent in the rainy season (26.7%) compared to the dry season (10.2%).We conclude that the granular formulation of spinosad (Natular G30) and a suspension concentrate formulation of λ-cyhalothrin proved highly effective against Aedes spp. in both the dry and rainy seasons in the cemetery habitat in this region.


8.
Artículo
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Resumen en: Inglés |
Resumen en inglés

It is formulated a stability analysis of a mathematical model to interpret the dynamics of the population growth including resistance to chemicals and phytocompounds. The threshold of the population growth of A. aegypti is determined. A sensitivity analysis and simulations of the model were developed. We conclude that the control focused in the non-resistant mosquitoes lead to a decrease in the resistant mosquitoes as well as the immature stages.


9.
- Capítulo de libro con arbitraje
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Mosquitos transmisores de arbovirosis emergentes de relevancia en salud pública
Dor Roques, Ariane Liliane Jeanne (autora) ; Bond Compeán, Juan Guillermo (autor) ; Casas Martínez, Mauricio (autor) ; Fernández Salas, Ildefonso (coaut.) ; Fernández Marina, Carlos (autor) ; Jamboos Toledo, Juan Carlos (autor) ;
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Contenido en: La Frontera Sur de México: ¿una salud en crisis? Documento de postura / editor Héctor Ochoa Díaz López ; Alejandro Bravo Valdez, dirección editorial Distrito Federal, México : Academia Nacional de Medicina de México, 2018 páginas 115-129 ISBN:978-607-443-758-4
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SIBE Campeche
59209-50 (Disponible) , 59209-40 (Disponible)
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SIBE Chetumal
59209-30 (Disponible)
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SIBE San Cristóbal
59209-10 (Disponible)
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SIBE Tapachula
59209-20 (Disponible)
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10.
- Artículo con arbitraje
A rapid quality control test to foster the development of genetic control in mosquitoes
Culbert, Nicole J. ; Balestrino, Fabrizio (coaut.) ; Dor Roques, Ariane Liliane Jeanne (coaut.) ; Herranz, Gustavo S. (coaut.) ; Wallner, Thomas (coaut.) ; Bouyer, Jérémy (coaut.) ;
Contenido en: Scientific Reports Vol. 8, no. 16179 (November 2018), p. 1-9 ISSN: 2045-2322
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Resumen en: Inglés |
Resumen en inglés

Vector-borne diseases are responsible for more than one million deaths per year. Alternative methods of mosquito control to insecticides such as genetic control techniques are thus urgently needed. In genetic techniques involving the release of sterile insects, it is critical to release insects of high quality. Sterile males must be able to disperse, survive and compete with wild males in order to inseminate wild females. There is currently no standardized, fast-processing method to assess mosquito male quality. Since male competitiveness is linked to their ability to fly, we developed a flight test device that aimed to measure the quality of sterile male mosquitoes via their capacity to escape a series of flight tubes within two hours and compared it to two other reference methods (survival rate and mating propensity). This comparison was achieved in three different stress treatment settings usually encountered when applying the sterile insect technique, i.e. irradiation, chilling and compaction. In all treatments, survival and insemination rates could be predicted by the results of a flight test, with over 80% of the inertia predicted. This novel tool could become a standardised quality control method to evaluate cumulative stress throughout the processes related to genetic control of mosquitoes.