Browsing by Autor "Jorge Espinoza"

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Biología reproductiva de dos poblaciones de Triatoma infestans (Hemiptera: Reduviidae) en condiciones de laboratorio
(Universidad Internacional de La Rioja, 2011) Jorge Espinoza; Marinely Bustamante; Ana Lineth García; Omar Tenorio; François Noireau; Demetrio Rivera; Mirko Rojas Cortez
Objectives: in the present study, we documented the reproductive biology of two populations of T. infestans, from the mesothermic\nAndean Valleys (20 de Octubre) and the Chaco Serrano (Mataral) in laboratory conditions. Methods: there was used 15 pairs of T. infestans\npopulations (Mataral and 20 de Octubre). The control population was colonies of T. infestans from laboratory. The insects were fed on\nchickens for 45 minutes and kept in a climate chamber at 28 ± 3 ° C, 60 ± 5%. The following parameters and rates were calculated: Fecundity,\nFertility, oviposition index (IO), fertility index (FI). Results: it was observed that the T. infestans strain from 20 de Octubre locality,\npresented the greatest number of eggs per day, with a daily fecundity average rate of (1.95 ± 1.5), a fertility of 95.6% (IO) averaged 0.43\n(IF) average of 0.9. Statistical analysis shown that the 20 de octubre locality, presented significant values between variables of number\nof eggs and the weight of triatomines with a ratio of R2 = 0.77 and a significant Pearson correlation. Conclusions: under laboratory\nconditions two different populations of T. infestans coming from different regions of Bolivia, shown different patterns of fecundity and\nfertility, these data are of valuable importance to be considered by vector control programs, since showed that the life cycle of the same\nvector species may vary according to geographical area, therefore, is very important to continue with studies that describe and help to\nunderstand the biology of the main vector species in Bolivia.
Caracterización de la infestación de viviendas por Aedes aegypti en el área metropolitana de Cochabamba, Bolivia: nuevos registros altitudinales
(2016) Evelin Aquino Rojas; Mirko Rojas Cortez; Jorge Espinoza; Efraín Vallejo; Daniel Lozano; Faustino Torrico
La rapida proliferacion del vector en areas de clima calido y baja altitud, como el oriente y la amazonia boliviana, genero la necesidad de analizar la adaptabilidad del A. aegypti en zonas templadas, tal es el caso de los valles mesotermicos de la ciudad metropolitana de Cochabamba. Objetivo : l a evaluacion entomologica se realizo en una muestra de 264 viviendas seleccionadas al azar en Abril del 2016. El area de estudio abarca zonas urbanas de seis municipios (Cercado, Sacaba, Colcapirhua, Tiquipaya, Quillacollo y Vinto) del departamento de Cochabamba. El diseno para el estudio fue epidemiologico, transversal de diagnostico comunitario . Metodos : de la muestra referida, 100 viviendas se encontraron larvas de A. aegypti , que corresponde a un 38% de infestacion larvaria y un Indice Breteau de 1,0. Las llantas, turriles y recipientes desechables son un factor de riesgo para la propagacion y adaptacion del vector en nuestra region. Resultados : los hallazgos confirman la dispersion del A. aegypti con algunas regiones con mayor prevalencia (zona sud de cercado urbano, Colcapirhua y Quillacollo en el valle bajo). Tambien se evidencio por primera vez que la dispersion y colonizacion de larvas de A. aegypti en el area de estudio alcanzo una altura minima de 2 538 m/s/n/m. y una altura maxima de 2 623 m.s.n.m. Conclusiones : La prevencion y el control de A. aegypti , en la metropoli de Cochabamba va a requerir un trabajo mancomunado integral e intersectorial enfocados en una estrategia de intervencion de gestion socioambiental de corresponsabilidad y participacion comunitaria, generando como resultado un Manejo Integrado del Vector. Palabras claves : Aedes aegypti , epidemiologia, infestacion, Bolivia .
Morphological changes associated with brachypterous Triatoma guasayana (Hemiptera, Reduviidae) and their relationship with flight
(Springer Nature, 2020) María Laura Hernández; Jorge Espinoza; Marinely Bustamante Gomez; David E. Gorla
Sand Fly Fauna in Chapare, Bolivia: An Endemic Focus ofLeishmania(Viannia)braziliensis: Table 1.
(Oxford University Press, 2012) Marinely Bustamante; Mery Diaz; Jorge Espinoza; Rudy Parrado; Richard Reithinger; Ana Lineth García
Data on the distribution and abundance of Lutzomyia spp. (Diptera: Psychodidae) in Bolivia is scarce. Sand flies from an area of Leishmania (Viannia) braziliensis endemicity in the Isiboro-Secure National Park in the Department of Cochabamba were captured and identified to species. In total, 945 sand flies (789 females and 156 males) belonging to 15 species were collected from the four collection points in two study villages in 2007. With 549 (58.1%) specimens, Lutzomyia shawi was the most abundant species, followed by Lutzomyia (Trichophoromyia) sp. (22.2%), Lutzomyia llanosmartinsi (8.3%), Lutzomyia antunesi (4.3%), and Lutzomyia olmeca (2.1%). Abundance and species composition varied between rainy and dry seasons, with 99.3% of all sand flies being collected outdoors. Because of species abundance and confirmed Leishmania infection in previous entomological collections, we believe Lu. shawi is the vector of L. (Viannia) braziliensis in Isiboro-Secure National Park.