In addition to causing discomfort, female mosquitoes introduce disease-carrying viruses and bacteria into the bloodstream of their victims. There are numerous publications describing the uses of sugary mosquito baits ...In addition to causing discomfort, female mosquitoes introduce disease-carrying viruses and bacteria into the bloodstream of their victims. There are numerous publications describing the uses of sugary mosquito baits with promising results. Without temperature control measures however, these methods are mainly useful for only nectar-feeding insects, including male mosquitoes, because the warmth of the blood is a condition for the females to locate their meals. The efforts required to keep the baits fresh against the natural spoiling process make them less attractive or impractical to implement. These experiments address these issues by using warm baits of water, sugar, boric acid, and antibiotics. Overnight, the general areas became clear of blood-sucking female mosquitoes while in numbers, the harmless males concentrated into the immediate vicinities. Control vs. experiment protocol established no other logical explanation for this phenomenon other than that females were attracted and killed by the bait. As expected, there was no female mosquito’s activity in these areas. There weren’t many left to do the work.展开更多
Objective:To determine the diversity of microbiota associated with different breeding habitats of dengue vector mosquitoes Aedes(Ae.)aegypti and Ae.albopictus and to identify any parasitic,epibiont,pathogenic,competit...Objective:To determine the diversity of microbiota associated with different breeding habitats of dengue vector mosquitoes Aedes(Ae.)aegypti and Ae.albopictus and to identify any parasitic,epibiont,pathogenic,competitive or predatory species.Methods:Sampling was performed from a variety of breeding habitats using dipping,pipetting and siphoning techniques.Microbiota in water samples were preserved using Rose Bengal solution and Lugol's iodine,and were identified.Live samples of microbiota were kept under laboratory conditions to observe any pathogenic or parasitic microbiota interacting with larvae.Results:A total of eleven microbiota species(Canthocamptus staphylinus,Canthocamptus microstaphylinus,Parastenocaris brevipes,Lepadella ovalis,Lepadella patella,Rotatoria rotatoria,Rotatoria macrura,Asplanchna brightwelli,Trichocerca rattus,Euglena variabilis,and Flagilaria capucina)belonging to four(4)phyla(Arthropoda,Rotifera,Euglenozoa,and Ochrophyta)and 8 microbiota species belonged to four phyla(Arthropoda,Rotifera,Euglenozoa,and Ochrophyta)were identified from Ae.aegypti and Ae.albopictus breeding habitats respectively.There was a higher percentage(54.54%)of larval habitats positive for the secondary vector Ae.albopictus than through the primary vector Ae.aegypti in the Gampola urban area indicating higher possibility of transmitting the dengue virus through the secondary vector.However,no pathogenic or parasitic ciliates on mosquito larvae were encountered in the present study.Those findings may be due to sampling maingly from temporary container-type breeding habitats.Conclusions:The relative distribution of microbiota associated with mosquito species differed significantly among Ae.aegypti and Ae.albopictus.The overall findings of this study could help in implementing novel eco-friendly vector-control strategies in the study area.展开更多
In the context of mosquito control, a plethora of devices have been put on the market. The effectiveness of these devices is not always proven, but some have interesting principles that have the potential to be a good...In the context of mosquito control, a plethora of devices have been put on the market. The effectiveness of these devices is not always proven, but some have interesting principles that have the potential to be a good means of mosquito control. Among these interesting devices are the photonic traps. We have carried out nightly captures of mosquitoes on human baits in the presence and absence of the device. These captures were made during the rainy season in the localities of Zogbadjè and Mènontin. The captures were made under the same atmospheric conditions at the same locations at 5-day intervals. These captures were made twice per house, indoors and outdoors, with one blank capture without the device and one capture with the device. The captured mosquitoes were identified and classified by genus and their aggressiveness determined by calculating the biting rate. A total of 845 mosquitoes were captured during these captures with 296 mosquitoes captured indoors without the device and 132 mosquitoes with the device present. This represents a decrease of 55.40% in culicidae density. Furthermore, a significant decrease was observed in aggressiveness, from 49 to 22 bites per man per night (b/m/n) with the use of the device. This decrease is even more important for nocturnal species such as Anopheles spp. whose aggressiveness decreased by 90%. The present study confirms the effectiveness of the “Electron go out mosquito small lamp” in reducing Culicidae density and mosquito aggression even in the presence of chemotactic interference. However, this study was limited in time and focused only on the ability of the device to reduce mosquito numbers and did not assess its epidemiological efficacy. It is therefore important to extend the work to examine the influence of the use of this device on population health and the occurrence of mosquito-borne diseases, particularly malaria.展开更多
文摘In addition to causing discomfort, female mosquitoes introduce disease-carrying viruses and bacteria into the bloodstream of their victims. There are numerous publications describing the uses of sugary mosquito baits with promising results. Without temperature control measures however, these methods are mainly useful for only nectar-feeding insects, including male mosquitoes, because the warmth of the blood is a condition for the females to locate their meals. The efforts required to keep the baits fresh against the natural spoiling process make them less attractive or impractical to implement. These experiments address these issues by using warm baits of water, sugar, boric acid, and antibiotics. Overnight, the general areas became clear of blood-sucking female mosquitoes while in numbers, the harmless males concentrated into the immediate vicinities. Control vs. experiment protocol established no other logical explanation for this phenomenon other than that females were attracted and killed by the bait. As expected, there was no female mosquito’s activity in these areas. There weren’t many left to do the work.
基金The present research received funds from Department of Zoology and Environmental Management,University of Kelaniya,Sri Lanka.
文摘Objective:To determine the diversity of microbiota associated with different breeding habitats of dengue vector mosquitoes Aedes(Ae.)aegypti and Ae.albopictus and to identify any parasitic,epibiont,pathogenic,competitive or predatory species.Methods:Sampling was performed from a variety of breeding habitats using dipping,pipetting and siphoning techniques.Microbiota in water samples were preserved using Rose Bengal solution and Lugol's iodine,and were identified.Live samples of microbiota were kept under laboratory conditions to observe any pathogenic or parasitic microbiota interacting with larvae.Results:A total of eleven microbiota species(Canthocamptus staphylinus,Canthocamptus microstaphylinus,Parastenocaris brevipes,Lepadella ovalis,Lepadella patella,Rotatoria rotatoria,Rotatoria macrura,Asplanchna brightwelli,Trichocerca rattus,Euglena variabilis,and Flagilaria capucina)belonging to four(4)phyla(Arthropoda,Rotifera,Euglenozoa,and Ochrophyta)and 8 microbiota species belonged to four phyla(Arthropoda,Rotifera,Euglenozoa,and Ochrophyta)were identified from Ae.aegypti and Ae.albopictus breeding habitats respectively.There was a higher percentage(54.54%)of larval habitats positive for the secondary vector Ae.albopictus than through the primary vector Ae.aegypti in the Gampola urban area indicating higher possibility of transmitting the dengue virus through the secondary vector.However,no pathogenic or parasitic ciliates on mosquito larvae were encountered in the present study.Those findings may be due to sampling maingly from temporary container-type breeding habitats.Conclusions:The relative distribution of microbiota associated with mosquito species differed significantly among Ae.aegypti and Ae.albopictus.The overall findings of this study could help in implementing novel eco-friendly vector-control strategies in the study area.
文摘In the context of mosquito control, a plethora of devices have been put on the market. The effectiveness of these devices is not always proven, but some have interesting principles that have the potential to be a good means of mosquito control. Among these interesting devices are the photonic traps. We have carried out nightly captures of mosquitoes on human baits in the presence and absence of the device. These captures were made during the rainy season in the localities of Zogbadjè and Mènontin. The captures were made under the same atmospheric conditions at the same locations at 5-day intervals. These captures were made twice per house, indoors and outdoors, with one blank capture without the device and one capture with the device. The captured mosquitoes were identified and classified by genus and their aggressiveness determined by calculating the biting rate. A total of 845 mosquitoes were captured during these captures with 296 mosquitoes captured indoors without the device and 132 mosquitoes with the device present. This represents a decrease of 55.40% in culicidae density. Furthermore, a significant decrease was observed in aggressiveness, from 49 to 22 bites per man per night (b/m/n) with the use of the device. This decrease is even more important for nocturnal species such as Anopheles spp. whose aggressiveness decreased by 90%. The present study confirms the effectiveness of the “Electron go out mosquito small lamp” in reducing Culicidae density and mosquito aggression even in the presence of chemotactic interference. However, this study was limited in time and focused only on the ability of the device to reduce mosquito numbers and did not assess its epidemiological efficacy. It is therefore important to extend the work to examine the influence of the use of this device on population health and the occurrence of mosquito-borne diseases, particularly malaria.
