Abstract
The efficiency of the Mosquito Magnet Liberty Plus™ (MMLP) trap was evaluated in comparison to human-landing catches (HLCs) to sample anopheline populations in Jabillal, state of Bolivar, southern Venezuela. The village comprised 37 houses and a population of 101; malaria in this village is primarily due to Plasmodium vivax and the Annual Parasite Index is 316.8 per 1,000 population. A longitudinal study was conducted between June 2008-January 2009 for three nights per month every two months between 17:30 pm-21:30 pm, a time when biting mosquitoes are most active. Anopheles darlingi and Anopheles nuneztovari were the most common species collected by both methods, whereas Anopheles marajoara was more abundant according to the HLC method. The MMLP trap was more efficient for collecting An. nuneztovari [63%, confidence interval (CI): 2.53] than for collecting An. darlingi (31%, CI: 1.57). There were significant correlations (p < 0.01) between the two methods for An. darlingi [Pearson correlation (R²) = 0.65] and An. nuneztovari (R² = 0.48). These preliminary results are encouraging for further investigations of the use of the MMLP trap for monitoring anopheline populations in remote malaria-endemic areas in the Amazon Basin.
Highlights
In entomological studies on malaria transmission and the evaluation of vector control programmes, it is necessary to estimate the human biting rate, i.e., the number of female mosquitoes found per person per night (WHO 1975)
CDC light traps set beside two human baits protected by mosquito nets caught only 10% of the Anopheles (Nyssorhynchus) nuneztovari Gabaldon collected during human-landing catches (HLCs), the trap was more efficient for sampling Anopheles (Nyssorhynchus) marajoara Galvão & Damasceno and Anopheles (Nyssorhynchus) oswaldoi (Peryassú) (Rubio-Palis & Curtis 1992)
Studies conducted in gold-mining areas of the state of Bolívar, southern Venezuela, showed that, compared with HLCs, CDC light traps were more efficient for sampling Anopheles darlingi Root and An. marajoara than the updraft UV light trap; both methods collected less than 30% of the mosquitoes landing on humans (Moreno et al 2002)
Summary
In entomological studies on malaria transmission and the evaluation of vector control programmes, it is necessary to estimate the human biting rate, i.e., the number of female mosquitoes found per person per night (WHO 1975). CDC light traps set beside two human baits protected by mosquito nets caught only 10% of the Anopheles (Nyssorhynchus) nuneztovari Gabaldon collected during HLCs, the trap was more efficient for sampling Anopheles (Nyssorhynchus) marajoara Galvão & Damasceno and Anopheles (Nyssorhynchus) oswaldoi (Peryassú) (Rubio-Palis & Curtis 1992).
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