Physiological aspects of multiple blood feeding in the malaria vector Anopheles tessellatus

Ramasamy, M. S.; Srikrishnaraj, K. Alagaratnam; Hadjirin, N; Perera, S. S. N.; Ramasamy, Ranjan

doi:10.1016/s0022-1910(99)00217-6

Cited by 12 publications

(9 citation statements)

References 25 publications

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“…This is in line with observations by Paaijmans et al [83]. The number of new eggs is simplified to a function of the number of gravid mosquitoes in each age group and their size (measured as wing length) based on observations [55,84-86]. The critical size is set to a wing length of 2.6 mm, which is less than that observed by Lyimo and Takken [85] but greater than observations by Yaro et al [87].…”

Section: Materials and Methods: Model Descriptionsupporting

confidence: 80%

A dynamic model of some malaria-transmitting anopheline mosquitoes of the Afrotropical region. I. Model description and sensitivity analysis

Lunde

Korecha

Loha

et al. 2013

Malar J

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BackgroundMost of the current biophysical models designed to address the large-scale distribution of malaria assume that transmission of the disease is independent of the vector involved. Another common assumption in these type of model is that the mortality rate of mosquitoes is constant over their life span and that their dispersion is negligible. Mosquito models are important in the prediction of malaria and hence there is a need for a realistic representation of the vectors involved.ResultsWe construct a biophysical model including two competing species, Anopheles gambiae s.s. and Anopheles arabiensis. Sensitivity analysis highlight the importance of relative humidity and mosquito size, the initial conditions and dispersion, and a rarely used parameter, the probability of finding blood. We also show that the assumption of exponential mortality of adult mosquitoes does not match the observed data, and suggest that an age dimension can overcome this problem.ConclusionsThis study highlights some of the assumptions commonly used when constructing mosquito-malaria models and presents a realistic model of An. gambiae s.s. and An. arabiensis and their interaction. This new mosquito model, OMaWa, can improve our understanding of the dynamics of these vectors, which in turn can be used to understand the dynamics of malaria.

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Section: Materials and Methods: Model Descriptionsupporting

confidence: 80%

A dynamic model of some malaria-transmitting anopheline mosquitoes of the Afrotropical region. I. Model description and sensitivity analysis

Lunde

Korecha

Loha

et al. 2013

Malar J

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“…After this time, the oocyte yolk continues to grow and assumes its final length 48 h ABF, stage that corresponds to the end of vitellogenesis [20,22]. The number of oocytes, or the size of a batch of eggs, determines the mosquito fecundity [23]. …”

Section: Introductionmentioning

confidence: 99%

Contribution of midgut bacteria to blood digestion and egg production in Aedes aegypti (diptera: culicidae) (L.)

et al. 2011

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BackgroundThe insect gut harbors a variety of microorganisms that probably exceed the number of cells in insects themselves. These microorganisms can live and multiply in the insect, contributing to digestion, nutrition, and development of their host.Recent studies have shown that midgut bacteria appear to strengthen the mosquito's immune system and indirectly enhance protection from invading pathogens. Nevertheless, the physiological significance of these bacteria for mosquitoes has not been established to date. In this study, oral administration of antibiotics was employed in order to examine the contribution of gut bacteria to blood digestion and fecundity in Aedes aegypti.ResultsThe antibiotics carbenicillin, tetracycline, spectinomycin, gentamycin and kanamycin, were individually offered to female mosquitoes. Treatment of female mosquitoes with antibiotics affected the lysis of red blood cells (RBCs), retarded the digestion of blood proteins and reduced egg production. In addition, antibiotics did not affect the survival of mosquitoes. Mosquito fertility was restored in the second gonotrophic cycle after suspension of the antibiotic treatment, showing that the negative effects of antibiotics in blood digestion and egg production in the first gonotrophic cycle were reversible.ConclusionsThe reduction of bacteria affected RBC lysis, subsequently retarded protein digestion, deprived mosquito from essential nutrients and, finally, oocyte maturation was affected, resulting in the production of fewer viable eggs. These results indicate that Ae. aegypti and its midgut bacteria work in synergism to digest a blood meal.Our findings open new possibilities to investigate Ae. aegypti-associated bacteria as targets for mosquito control strategies.

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“…Among vectors of human diseases, gonotrophic discordance has been described in culicines and anophelines (Scott et al 1993). The ingestion of more than one blood meal per gonotrophic cycle, under laboratory conditions, has been recorded for Anopheles tessellates (Ramasamy et al 1990, Ramasamy et al 2000), An. atroparvus (Fernandes and Briegel 2005), An.…”

Section: Introductionmentioning

confidence: 99%

Multiple blood meals inAnopheles darlingi(Diptera: Culicidae)

Oliveira¹,

Tadei²,

Abdalla³

et al. 2012

Journal of Vector Ecology

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Anopheles darlingi is an important vector of human malaria in the Amazon. Adult females of this mosquito species require a blood meal to develop eggs, preferring humans to other blood sources. Although gonotrophic concordance has been described as the norm for An. darlingi, here we report An. darlingi female mosquitoes taking two or more blood meals within their first gonotrophic cycle. Only half of field-captured adult females fed one blood meal developed follicles to Christophers' stage V. This outcome is dependent on larval nutrition, as 88% of laboratory-raised well-nourished females completed the first gonotrophic cycle with only one blood meal, while less nourished females needed additional blood meals. Half of the fieldcaptured blood-seeking An. darlingi females had follicles in intermediate (IIIa and IIIb) and final (V) stages of the gonotrophic cycle, supporting the conclusion that An. darlingi blood feed more than once during a gonotrophic cycle. Additionally, we observed females attempting to blood feed a second time during the same day. Additional studies of An. darlingi biting behavior are necessary to accurately estimate Plasmodium sp. entomologic inoculation rates throughout the An. darlingi vast geographical distribution. Journal of Vector Ecology 37 (2): 351-358. 2012.

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Physiological aspects of multiple blood feeding in the malaria vector Anopheles tessellatus

Cited by 12 publications

References 25 publications

A dynamic model of some malaria-transmitting anopheline mosquitoes of the Afrotropical region. I. Model description and sensitivity analysis

A dynamic model of some malaria-transmitting anopheline mosquitoes of the Afrotropical region. I. Model description and sensitivity analysis

Contribution of midgut bacteria to blood digestion and egg production in Aedes aegypti (diptera: culicidae) (L.)

Multiple blood meals inAnopheles darlingi(Diptera: Culicidae)

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