Temperature influence on embryonic development of Anopheles albitarsis and Anopheles aquasalis

Carvalho, Sabrina Cardozo Gonçalvez de; Martins, Ademir de Jesus; Lima, José Bento Pereira; Valle, Denise

doi:10.1590/s0074-02762002000800009

Cited by 35 publications

(17 citation statements)

References 17 publications

(19 reference statements)

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“…La asociación de las lluvias con condiciones ecológicas y ambientales observadas en la región del brote que favorecen la presencia de criaderos de anofelinos vectores, puede llegar a tener una incidencia directa en la transmisión de la malaria. En la actualidad, se ha establecido que la variabilidad y el cambio climático influyen en las condiciones de vida, longevidad y dinámica de Anopheles adultos, lo que repercute en la transmisión de la enfermedad (28,29). Igualmente, en forma experimental se ha evidenciado que la temperatura y la humedad son factores que pueden alterar la longevidad del mosquito y la tasa de ovogénesis, y aumentar la dinámica de transmisión de la malaria (30,31 hábitats acuáticos y la vegetación en sus criaderos es diversa (32,33).…”

Section: Discussionunclassified

Caracterización de la transmisión de la malaria por Plasmodium vivax en la región fronteriza de Panamá con Costa Rica en el municipio de Barú, Panamá

et al. 2012

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Contribución de los autores:Todos los autores contribuyeron en la redacción y corrección del manuscrito, análisis e interpretación de los datos, verificación de referencias bibliográficas, observaciones y revisión crítica del mismo. ARTÍCULO ORIGINAL Biomédica 2012;32:557-69 doi: http://dx.doi.org/10.7705/biomedica.v32i4.773 Caracterización de la transmisión de la malaria por Plasmodium vivax en la región fronteriza de Panamá con Costa Rica en el municipio de Barú, Panamá Characterization of Plasmodium vivax malaria transmission at the border of Panamá and Costa RicaIntroduction. Few studies have described the factors associated with Plasmodium vivax transmission dynamics in endemic regions from Panamá. Objective. Malaria transmission dynamics produced by P. vivax were characterized at the border between Panamá and Costa Rica. Materials and methods. In the municipality of Barú, an observational, descriptive and cross-sectional study was undertaken to measure the annual parasite index (API), slide positivity index (SPR), and the annual blood examination rate (ABER). The most frequent symptoms and signs in malaria patients were recorded. The anopheline species were identified in the area and the preferred larval habitats, the density of larval populations in the larval habitats and the bites/human/night were characterized. Results. Of a total of 10,401 thick smear blood samples, 83 were positive for P. vivax. Of these, 84% came from rural areas and 79% were from economically active individuals. The median and average ages were 36 and 30 years, respectively, and 58.5% of the malaria cases were male. API was 4.1/1,000 inhabitants; SPR was 0.8% and ABER was 51.9%. Of the diagnosed cases, 54% showed blood parasitemias ranging between 100-2,000 parasites/µl. The majority of the cases were observed in May and June. Two mosquito vector species were identified--Anopheles albimanus and An. punctimacula. Conclusion. These observations indicate the advisibility of continued entomological studies, strengthening of epidemiological surveillance, consideration of additional risk factors and evaluation

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Section: Discussionunclassified

Caracterización de la transmisión de la malaria por Plasmodium vivax en la región fronteriza de Panamá con Costa Rica en el municipio de Barú, Panamá

et al. 2012

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“…Field mosquitoes from each species were separated and housed in the rearing containers. Anopheles aquasalis mosquitoes originated from a colony established in 1995 [54] were reared from eggs to adult. All mosquitoes were ad libitum fed 10% sugar solution and kept in laboratory conditions at 26-28°C and 70-80% RH (relative humidity).…”

Section: Methodsmentioning

confidence: 99%

“…aquasalis as an available autonomous colony. Anopheles aquasalis has been reared in laboratory as free mating since 1995 [54-56] and recently adapted as a well-established colony in Amazon institutions for experimental studies [57-59]. …”

Section: Introductionmentioning

confidence: 99%

Experimental Plasmodium vivax infection of key Anopheles species from the Brazilian Amazon

Ríos-Velásquez

Martins-Campos

Simões

et al. 2013

Malar J

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BackgroundAnopheles darlingi is the major malaria vector in countries located in the Amazon region. Anopheles aquasalis and Anopheles albitarsis s.l. are also proven vectors in this region. Anopheles nuneztovari s.l. and Anopheles triannulatus s.l. were found infected with Plasmodium vivax; however, their status as vectors is not yet well defined. Knowledge of susceptibility of Amazon anopheline populations to Plasmodium infection is necessary to better understand their vector capacity. Laboratory colonization of An. darlingi, the main Amazon vector, has proven to be difficult and presently An. aquasalis is the only available autonomous colony.MethodsLarvae of An. darlingi, An. albitarsis s.l., An. nuneztovari s.l. and An. triannulatus s.l. were collected in the field and reared until adult stage. Adults of An. aquasalis were obtained from a well-established colony. Mosquitoes were blood-fed using a membrane-feeding device containing infected blood from malarial patients.The infection of the distinct Anopheles species was evaluated by the impact variance of the following parameters: (a) parasitaemia density; (b) blood serum inactivation of the infective bloodmeal; (c) influence of gametocyte number on infection rates and number of oocysts. The goal of this work was to compare the susceptibility to P. vivax of four field-collected Anopheles species with colonized An. aquasalis.ResultsAll Anopheles species tested were susceptible to P. vivax infection, nevertheless the proportion of infected mosquitoes and the infection intensity measured by oocyst number varied significantly among species. Inactivation of the blood serum prior to mosquito feeding increased infection rates in An. darlingi and An. triannulatus s.l., but was diminished in An. albitarsis s.l. and An. aquasalis. There was a positive correlation between gametocyte density and the infection rate in all tests (Z = −8.37; p < 0.001) but varied among the mosquito species. Anopheles albitarsis s.l., An. aquasalis and An. nuneztovari s.l. had higher infection rates than An. darlingi.ConclusionAll field-collected Anopheles species, as well as colonized An. aquasalis are susceptible to experimental P. vivax infections by membrane feeding assays. Anopheles darlingi, An. albitarsis s.l. and An. aquasalis are very susceptible to P. vivax infection. However, colonized An. aquasalis mosquitoes showed the higher infection intensity represented by infection rate and oocyst numbers. This study is the first to characterize experimental development of Plasmodium infections in Amazon Anopheles vectors and also to endorse that P. vivax infection of colonized An. aquasalis is a feasible laboratory model.

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“…However, recent reports have shown that several factors might be involved in the reproductive capacity of mosquitoes. These include, for instance, the quantity and quality of protein reserves accumulated by the mosquito during the pre-imaginal stages (Klowden et al, 1988;Amalraj et al, 2005), the temperature of larvae breeding sites (Alto and Juliano, 2001;de Carvalho et al, 2002), and the size of the mosquito, its diet and its physiological Number of blood meals (day of the blood meal) 6 (12th day) 8 (16th day) 10 (20th day) 12 (24th day) Fig. 4 (colour online).…”

Section: Discussionmentioning

confidence: 99%

The impact of oviposition-site deprivation in gravid females of Anopheles gambiae (Diptera: Culicidae) on fecundity, trophic behaviour and life expectancy

Govoétchan¹,

Sovi²,

Aïkpon³

et al. 2013

Int. J. Trop. Insect Sci.

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Short and long dry spells occur throughout the year and limit the access of gravid mosquitoes to oviposition sites. Using simulations in laboratory conditions, we explored the possible consequences of a long duration of egg retention on reproductive capacity, trophic behaviour, life expectancy and gonotrophic cycle in a context of breedingsite absence. KISUMU and wild gravid females of Anopheles gambiae were subjected to a delay in egg-laying following the preset modalities as immediate egg-laying versus retention for 5, 10 and 15 days. The egg batch size and the hatching rate were measured. In addition, blood-feeding patterns and life expectancy were investigated. Our study showed that oviposition occurs much faster in the standard susceptible laboratory strain An. gambiae KISUMU with a lapse of 2.2 days than in the wild females of An. gambiae with an average of 5 days between the second blood meal and egg-laying. In this experiment, the egg-retention time did not significantly affect the number of eggs laid. In the absence of breeding sites, the rate of egg-hatching decreased in proportion as the retention time became longer. The study also showed that gravid females deprived of oviposition sites continue to take blood meals. The average longevity of non-gravid females was estimated to be lower than that of gravid females. The oviposition-site deprivation has no impact on female fecundity and blood feeding, but influences egg-hatching.

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Temperature influence on embryonic development of Anopheles albitarsis and Anopheles aquasalis

Cited by 35 publications

References 17 publications

Caracterización de la transmisión de la malaria por Plasmodium vivax en la región fronteriza de Panamá con Costa Rica en el municipio de Barú, Panamá

Caracterización de la transmisión de la malaria por Plasmodium vivax en la región fronteriza de Panamá con Costa Rica en el municipio de Barú, Panamá

Experimental Plasmodium vivax infection of key Anopheles species from the Brazilian Amazon

The impact of oviposition-site deprivation in gravid females of Anopheles gambiae (Diptera: Culicidae) on fecundity, trophic behaviour and life expectancy

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