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41 resultados encontrados para: AUTOR: Marina Fernández, Carlos Félix
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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.
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


3.
Tesis - Doctorado
Diferenciación poblacional de Lutzomyia cruciata (Diptera: Psychodidae: Phlebotominae) en el sureste de México / Oscar Fernando Mikery Pacheco
Mikery Pacheco, Oscar Fernando (autor) ; Castillo Vera, Alfredo (director) ; Marina Fernández, Carlos Félix (asesor) ; Rebollar Téllez, Eduardo Alfonso (asesor) ; Cruz López, Leopoldo Caridad (asesor) ;
Tapachula, Chiapas, México : El Colegio de la Frontera Sur , 2019
Clasificación: TE/595.772097275 / M55
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
ECO020013625 (Disponible)
Disponibles para prestamo: 1
Resumen en español

El flebotomineo antropofílico Lutzomyia cruciata (Diptera: Psychodidae: Phlebotominae) es vector de Leishmania mexicana, agente causal de Leishmaniasis Cutánea Localizada (LCL) en México. Esta especie se encuentra distribuida en varios países de América, llegando a consolidarse como predominante en algunas regiones biogeográficas. Su amplia distribución en ecosistemas con diferente grado de perturbación y limitada dispersión de esta especie, pueden provocar variaciones poblacionales que potencialicen una diferenciación epidemiológica de la LCL a nivel intraespecífico. El objetivo de este estudio fue analizar la variabilidad morfológica, química y genética de individuos de Lu. cruciata de sitios distribuidos en la Costa del estado de Chiapas. Individuos de Lu. cruciata de ambos sexos fueron recolectados en cuatro localidades con diferente altitud y distribuidas en la zona costa de la región Soconusco, Chiapas, utilizando una trampa Shannon (cebo humano) y 18 trampas CDC (cebo lumínico). El estudio morfológico fue realizado aplicando los métodos tradicional (44 a 46 caracteres) y geométrico (ala). Un análisis de variabilidad genética intra- e inter-poblacional fue realizado a partir de secuencias de ADN 5’ del gen mitocondrial citocromo c oxidasa subunidad 1 (COI) y perfiles químicos abdominales. Estos tres estudios coinciden en encontrar similitudes entre poblaciones de Lu. cruciata con el mismo origen geográfico, es decir, las diferencias morfológicas, químicas y genéticas presentes en las poblaciones de Lu. cruciata incrementan a mayor distancia de su origen geográfico. Estos resultados demuestran la plasticidad de esta especie ante las condiciones ambientales locales, lo que podría propiciar la formación de un incipiente complejo de especies a partir de las distintas poblaciones de Lu. cruciata del sureste de México.

Índice

Resumen
Capítulo I. Introducción general
Pregunta de investigación
Hipótesis
Objetivo
Capítulo II. Epidemiología de las Leishmaniasis en el sureste de la República Mexicana. Mikery O. F. y A. Castillo. 2018. Leishmaniasis, 163-175 pp. En: Díaz H. O. L. (Ed.) La Frontera Sur de México, ¿una salud en crisis? Academia Nacional de Medicina. 253 p
Capítulo III. Influence of the weather on Leishmaniasis transmission: Sandflies vectors, Leishmania parasites and reservoirs. Artículo que será sometido al Global Change Biology
Capítulo IV. Traditional and Geometric Morphometry Analyses of Lutzomyia cruciata (Diptera: Psychodidae: Phlebotominae) Populations of Chiapas, Mexico. Artículo públicado en el Journal of Medical Entomology, DOI: 0.1093/jme/tjy
Capítulo V. Chemical and Genetic Variability of Lutzomyia cruciata (Diptera: Psychodidae: Phlebotominae) Populations of Southern of Mexico. Concluido para someterse al Journal of Medical Entomology
Capítulo VI. Conclusiones generales
Literatura citada


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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.


5.
Artículo
*Solicítelo con su bibliotecario/a
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
Nota: Solicítelo con su bibliotecario/a
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.


6.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

Aedes aegypti is a major vector of arboviruses that may be controlled on an area-wide basis using the sterile insect technique (SIT). Larval diet is a major factor in mass-rearing for SIT programs. We compared dietary effects on immature development and adult fitness-related characteristics for an International Atomic Energy Agency (IAEA) diet, developed for rearing Ae. albopictus, and a standardized laboratory rodent diet (LRD), under a 14:10 h (light:dark) photoperiod ("light" treatment) or continuous darkness during larval rearing. Larval development was generally fastest in the IAEA diet, likely reflecting the high protein and lipid content of this diet. The proportion of larvae that survived to pupation or to adult emergence did not differ significantly between diets or light treatments. Insects from the LRD-dark treatment produced the highest proportion of male pupae (93% at 24 h after the beginning of pupation) whereas adult sex ratio from the IAEA diet tended to be more male-biased than that of the LRD diet. Adult longevity did not differ significantly with larval diet or light conditions, irrespective of sex. In other aspects the LRD diet generally performed best. Adult males from the LRD diet were significantly larger than those from the IAEA diet, irrespective of light treatment. Females from the LRD diet had ~25% higher fecundity and ~8% higher egg fertility compared to those from the IAEA diet. Adult flight ability did not differ between larval diets, and males had a similar number of copulations with wild females, irrespective of larval diet. The LRD diet had lower protein and fat content but a higher carbohydrate and energetic content than the IAEA diet. We conclude that the LRD diet is a low-cost standardized diet that is likely to be suitable for mass-rearing of Ae. aegypti for area-wide SIT-based vector control.


7.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

The larvicidal efficacy of the naturally derived insecticide spinosad, for control of immature stages of Anopheles albimanus and associated culicids, was compared to that of synthetic and biological larvicides. Effects on non-target insects were also determined. Methods: A field trial was performed in replicated temporary pools during the rainy season, in southern Mexico. Pools were treated with 10 ppm a.i. spinosad (Tracer 480SC), Bti granules applied at 2 kg/ha (VectoBac WDG, ABG-6511), and 100 ml/ha temephos (50 EC), or an untreated control. Numbers of immature mosquitoes, and aquatic insects in pools were monitored for 20 weeks. Results: Samples of immature mosquitoes comprised approximately 10% An. albimanus , 70% Culex spp. (mostly Cx. melanoconion and Cx. coronator ) and 20% Uranotaenia lowii . The most effective larvicides were spinosad and temephos that eliminated An. albimanus in 16 out of 20 post-treatment samples, or 9 weeks of continuous control of immature stages, respectively. These larvicides resulted in 15 and 5 weeks of elimination of Culex spp., respectively, or 20 and 4 weeks of continuous elimination of U. lowii , respectively. Bti treatment provided little consistent control. Aquatic insects were recorded comprising 3 orders, 20 families, 40 genera and 44 species. Shannon diversity index values (H?) for aquatic insects were highest in the control (0.997) and Bti (0.974) treatments, intermediate in the spinosad treatment (0.638) and lowest in the temephos treatment (0.520). Severely affected non-target insects in the spinosad and temephos treated pools were predatory Coleoptera, Hemiptera and Odonata, which in the case of spinosad was likely due to the high concentration applied. Bti had little effect on aquatic insects.

The spinosad treatment retained larvicidal activity for markedly longer than expected. Spinosad is likely to be an effective tool for control of anopheline and other pool-breeding mosquitoes in tropical regions. Non-target effects of spinosad on aquatic insects merit further study, but were likely related to the concentration of the product used.


8.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

The composition and seasonal occurrence of sandflies were investigated in coffee agroecosystems in the Soconusco region of Chiapas, Mexico. Insect sampling was performed on three plantations located at different altitudes: Finca Guadalupe Zajú [1,000 m above sea level (a.s.l.)], Finca Argovia (613 m a.s.l.) and Teotihuacán del Valle (429 m a.s.l.). Sandflies were sampled monthly from August 2007-July 2008 using three sampling methods: Shannon traps, CDC miniature light traps and Disney traps. Sampling was conducted for 3 h during three consecutive nights, beginning at sunset. A total of 4,387 sandflies were collected during the course of the study: 2,718 individuals in Finca Guadalupe Zajú, 605 in Finca Argovia and 1,064 in Teotihuacán del Valle. The Shannon traps captured 94.3% of the total sandflies, while the CDC light traps and Disney traps captured 4.9% and 0.8%, respectively. More females than males were collected at all sites. While the number of sandflies captured was positively correlated with temperature and relative humidity, a negative correlation was observed between sandfly numbers and rainfall. Five species of sandflies were captured: Lutzomyia cruciata, Lutzomyia texana, Lutzomyia ovallesi, Lutzomyia cratifer / undulata and Brumptomyia sp. Lu. cruciata, constituting 98.8% of the total, was the most abundant species. None of the captured sandflies was infected with Leishmania spp.


9.
- Artículo con arbitraje
*En hemeroteca, SIBE-San Cristóbal
Infección natural de Lutzomyia Cruciata (Diptera: Psychodidae, Phlebotominae) con Wolbachia en cafetales de Chiapas, México
Mikery Pacheco, Oscar Fernando ; Marina Fernández, Carlos Félix (coaut.) ; Ibáñez Bernal, Sergio (coaut.) ; Sánchez Guillén, Daniel (coaut.) ; Castillo Vera, Alfredo (coaut.) ;
Contenido en: Acta Zoológica Mexicana. Nueva Serie Vol. 28, no. 2 (agosto 2012), p. 401-413 ISSN: 0065-1737
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
52296-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
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Resumen en: Español | Inglés |
Resumen en español

Se muestran los resultados de la búsqueda de Leishmania y Wolbachia mediante PCR, en flebotominos recolectados durante 2011 (febrero-marzo) en cafetales de cuatro localidades ubicadas dentro de un transecto altitudinal en la región del Soconusco, Chiapas, México. Las especies Lutzomyia texana y Lu. carpenteri son documentadas por primera vez para el estado de Chiapas. Wolbachia fue detectada en una hembra de Lutzomyia cruciata capturada en la Finca Guadalupe Sajú. Todas las muestras fueron negativas a Leishmania.

Resumen en inglés

Using PCR-based tools, we show the results of screening for Leishmania and Wolbachia in a phlebotomine sand flies collected during 2011 (February-march) in coffee plantations of four localities along an altitudinal transect in the Soconusco region, Chiapas, Mexico. The species Lutzomyia texana and Lu. carpenteri are documented for the first time for the state of Chiapas. Wolbachia was detected in a female of Lutzomyia cruciata captured in the Guadalupe Saju farm. All samples were negative to Leishmania.


10.
- Artículo con arbitraje
Spinosad: a biorational mosquito larvicide for use in car tires in southern Mexico
Marina Fernández, Carlos Félix ; Bond Compeán, Juan Guillermo (coaut.) ; Muñoz, José (coaut.) ; Valle Mora, Javier Francisco (coaut.) ; Chirino, Nelva (coaut.) ; Williams, Trevor (coaut.) ;
Contenido en: Parasites and Vectors Vol. 5, no. 1 (December 2012), p. 1-10 ISSN: 1756-3305
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Resumen en: Inglés |
Resumen en inglés

Background: Car tires are important habitats for mosquito development because of the high density populations they can harbor and their presence in urban settings. Water in experimental tires was treated with one of three insecticides or an untreated control. Aquatic invertebrates were sampled at weekly intervals. Eggs, larval and pupal samples were laboratory-reared to estimate seasonal fluctuations in Aedes aegypti and Ae. albopictus abundance. Results: Spinosad treatments at 1 or 5 ppm (mg a.i./liter) provided 6–8 weeks of effective control of Ae. aegypti, Ae. albopictus, Culex quinquefasiatus and Cx. coronator larvae, both in the dry season and the rainy season when mosquito populations increased markedly in southern Mexico. Spinosad continued to provide partial control of larvae for several weeks after initial recolonization of treated tires. The larvicidal performance of VectoBac 12AS (Bacillus thuringiensis var. israelensis) was relatively poor with one week of complete control of Aedes spp. larvae and no discernible control of Culex spp., whereas the duration of larvicidal activity of 1% temephos mineral-based granules was intermediate between those of VectoBac and spinosad treatments. Populations of chironomids, ostracods and Toxorhynchites theobaldi were generally reduced in spinosad and temephos treatments, but were similar in control and VectoBac treatments. Conclusion: The present study is the first to report spinosad as an effective larvicide against Cx. coronator, which is currently invading the southern United States. These results substantiate the use of spinosad as a highly effective mosquito larvicide, even in habitats such as unused car tires that can represent prolific sources of adult mosquitoes.