A5023082587- Mosquito-borne diseases and control
- Malaria Research and Control
- Insect Pest Control Strategies
- Viral Infections and Vectors
- Insect Resistance and Genetics
- Dengue and Mosquito Control Research
- Insect symbiosis and bacterial influences
- Species Distribution and Climate Change
- Aquatic Ecosystems and Biodiversity
- Animal Behavior and Reproduction
- Plant and animal studies
- Global Maternal and Child Health
- Vector-borne infectious diseases
- Vector-Borne Animal Diseases
- Insect and Arachnid Ecology and Behavior
- Travel-related health issues
- Amphibian and Reptile Biology
- Parasites and Host Interactions
- Bird parasitology and diseases
- Crustacean biology and ecology
- Animal Diversity and Health Studies
- Insect Utilization and Effects
- Environmental DNA in Biodiversity Studies
- Digital Imaging for Blood Diseases
- Energy and Environment Impacts
Nagasaki University
2014-2025
Vector (United States)
2019
University of Nagasaki
2017
Hokkaido University
2005-2011
Kenya Medical Research Institute
2007
Background Yellow fever is endemic in some countries Africa, and Aedes aegpyti one of the most important vectors implicated outbreak. The mapping nation-wide distribution detection insecticide resistance vector mosquitoes will provide beneficial information for forecasting dengue yellow outbreaks effective control measures. Methodology/Principal Findings High to DDT was observed all mosquito colonies collected Ghana. possible existence or tolerance permethrin were suspected colonies....
Japanese encephalitis (JE) remains a public health concern in several countries, and the Culex mosquito plays central role its transmission cycle. mosquitoes harbor wide range of viruses, including insect-specific viruses (ISVs), can transmit variety arthropod-borne (arboviruses) that cause human animal diseases. The current trend studies displays enhanced efforts to characterize virome through bulk RNA sequencing due possible arbovirus–ISV interactions; however, extent viral diversity taxon...
To combat malaria, the Kenya Ministry of Health and nongovernmental organizations (NGOs) have distributed insecticide-treated nets (ITNs) for use over beds, with coverage children under five years age increasing rapidly. Nevertheless, residents fishing villages started to these bed drying fish in Lake Victoria. This study investigated extent net misuse villages.Seven along lake were surveyed estimate how widely being used fish. Villagers asked why they such purposes.In total, 283 Of these,...
The prevalence of malaria among the residents Lake Victoria basin remains high. environment associated with lake may maintain a high number vectors. habitats including water hyacinths have been suspected to be source This study investigated whether vectors breed in and adjacent backwater pools. Anopheline larvae were collected within littoral zone pools located along approximately 24.3 km lakeshore western Kenya, their breeding sites characterized. Three primary vector species, Anopheles...
Abstract Background Although insecticide-treated bed nets are effective tools, use often does not follow ownership. House structure and space arrangements may make the attempt to difficult, especially for school age children. The objectives of this study were explore whether an individual's sleeping house affect net in villages along Lake Victoria western Kenya. Methods Sleeping residents directly observed a net, bed, location. size, number types rooms, availability, residents' ages...
Mass insecticide treated bed net (ITN) deployment, and its associated coverage of populations at risk, had "pushed" a decline in malaria transmission. However, it is unknown whether control being enhanced by zooprophylaxis, i.e., mosquitoes diverted to feed on hosts different from humans, phenomenon that could further reduce entomological transmission risk areas where livestock herding common. Between May July 2009, we collected 104 houses three neighboring villages with high ITN (over 80%),...
Abstract Understanding how life is adapting to urban environments represents an important challenge in evolutionary biology. Here we investigate a widely cited example of adaptation, Culex pipiens form molestus , also known as the London Underground Mosquito. Population genomic analysis ∼350 contemporary and historical samples counter popular hypothesis that originated belowground less than 200 years ago. Instead, show first adapted human aboveground Middle East over course >1000 years,...
In Kenya, insecticide-treated mosquito nets (ITNs) distributed to pregnant women and children under 5 years old through various programs have resulted in a significant reduction malaria deaths. All of the World Health Organization-recommended insecticides for are pyrethroids, vector resistance these is one major obstacles an effective control program. Anopheles gambiae s.s. arabiensis vectors that widely Kenya. Two point mutations voltage-gated sodium channel (L1014F L1014S) associated with...
Background Dengue virus (DENV) is an extraordinary health burden on global scale, but still lacks effective vaccine. The Philippines endemic for dengue fever, massive employment of insecticides favored the development resistance mutations in its major vector, Aedes aegypti. Alternative vector control strategies consist releasing artificially modified mosquitos wild, knowledge their dispersal ability necessary a successful implementation. Despite being documented that Ae. aegypti can be...
Identification of malaria vector breeding sites can enhance control activities. Although associations between and topography are well recognized, practical models that predict from topographic information lacking. We used variables derived remotely sensed Digital Elevation Models (DEMs) to model the vectors. further compared predictive strength two different DEMs evaluated predictability various habitat types inhabited by Anopheles larvae.
The water level of Lake Victoria has fallen more than 1.5 m since 1998, revealing a narrow strip land along the shore. This study determined whether recent drop in created additional breeding grounds for malaria vectors. and past shorelines were estimated using landmarks satellite image. locations habitats recorded GPS unit during high low lake periods. GIS was used to determine located on newly emerged between new old shorelines. Over half existed land. Fewer Anopheles gambiae complex found...
The Asian tiger mosquito, Aedes albopictus (Skuse) (Diptera: Culicidae), is a vector of several human pathogens. Ae. also an invasive species that, over recent years, has expanded its range out native Asia. was suspected to be present in Central America since the 1990s, and presence confirmed by most American nations 2010. Recently, this been regularly found, yet low numbers, limited areas Panamá Costa Rica (CR). Here, we report that short sequences (∼558 bp) mitochondrial cytochrome oxidase...
Abstract Background When the first systematic list of mosquitoes in Nepal was reported 1990, there no description Aedes aegypti (L.), while albopictus (Skuse) has been included Stegomyia subgroup since 1950s. The record Ae. 2009, suggesting some coincidence between invasion this species and dengue fever 2006. Results We performed a field survey distribution insecticide susceptibility 2017 2018. Mosquito larvae were collected from used tires located along streets Kathmandu, Bharatpur Pokhara,...
Many arboviral outbreaks have occurred in various locations Kenya. Entomological surveys are suitable methods for revealing information about circulating arboviruses before human recognized. Therefore, mosquitoes were collected Kenya to determine the distribution of arboviruses. Various species sampled from January July 2012 using several collection methods. Mosquito homogenates directly tested by reverse transcription-polymerase chain reaction (RT-PCR) arbovirus-targeted primer pairs. We...
Abstract Background Aedes albopictus has been reported in several Central African countries, including the Democratic Republic of Congo (DRC). The establishment this mosquito species poses a serious threat as vector various infectious diseases. Although Ae. western region DRC, information about its distribution is still scarce country. aim study was to investigate current nationwide invasive , well other native mosquitoes, DRC and identify suitable areas for future expansion. Methods Two...
Abundance and species composition of sympatric malaria vector are the important factors governing transmission intensity. A widespread insecticidal bed net coverage may replace endophagic with exophagic species. However, unique local environments also influence a population. This study examined impacts nets on An. gambiae s.l populations in Mbita District Suba District. The compositions s.l. larvae were compared between 1997, 2009 2010 geographical areas. abundance females resting indoors...
SUMMARY Children who sleep on the floor are less likely to use long-lasting insecticidal nets (LLINs); however, relationship between sleeping location and Plasmodium falciparum infection has not been investigated sufficiently. This study revealed whether (bed vs floor) is associated with P. among children 7–59 months old. More than 60% of slept floor. Younger were significantly more in beds [odds ratio, OR 2·31 (95% confidence interval (CI) 2·02–2·67)]. Nearly 70% under LLINs previous night....
It has been suggested that mosquito larvae and pupae dive to avoid predators. We tested this predator-avoidance hypothesis by using immature Anopheles gambiae Giles (Diptera: Culicidae) the wolf spider Pardosa messingerae (Stand) (Araneae: Lycosidae). Because previous studies have spiders are poor predators of mosquitoes, we first examined predatory ability found was effective at capturing all stages pupae. The mortality from experimental cups containing deep water increased with age...
Getah virus (GETV; genus Alphavirus, family Togaviridae) is a mosquito-borne known to cause disease in horses and pigs. In 2014, for the first time ∼30 years, sudden GETV outbreak occurred among racehorses Ibaraki, Japan. Two years before this outbreak, we obtained multiple isolates from Culex tritaeniorhynchus mosquitoes collected Nagasaki, Japan determined whole genome sequence of isolate 12IH26. Our phylogenetic analysis strains revealed that 12IH26 forms robust clade with epidemic...
Abstract The mosquito Aedes aegypti (L.) is the primary vector of various infectious viruses and typified by a polymorphic color abundance white scales on body. It has been conventionally separated into two subspecies, Ae. aeg. formosus (Walker) (Aaf) (Aaa), with Aaf considered ‘sylvan’ form Aaa ‘domestic’ form. Because subspecies show different susceptibilities to dengue it important understand their distribution. In this study, we collected larvae from artificial natural habitats in...
Since Ochthera chalybescens had been reported to prey on African malaria vectors, the predatory capacity of adults this species Anopheles gambiae sensu stricto was explored. Predatory fly A. s.s. tested at all developmental stages, including adult stage in laboratory setting. Effects water depth its were also examined. This study revealed that O. preyed mosquitoes life stages except eggs. It able an average 9.8 18.8 mosquito larvae 24 hrs. Mosquito larva size and did not affect capacity....
Getah virus (GETV), belonging to the genus Alphavirus within family Togaviridae, is a mosquito-borne that causes fever, rash, and edema in horses fatalities pregnancy disorders pigs. It has caused occasional outbreaks horse populations Japan, China, India, endemic areas are gradually expanding, particularly Asia Oceania. In this study, we isolated new GETV strain from Culex tritaeniorhynchus mosquitoes collected Nagasaki Prefecture, Japan 2022. Phylogenetic analysis revealed strain, 22IH8,...
Abstract Semelparity is prevalent in arthropod species that exhibit maternal care. Previous hypotheses postulated long‐term care constrains future reproduction females, leading to the evolution of semelparity. Nevertheless, females may occasionally lose all or part their offspring because predation other causes. Where first egg mass for any reason, potential produce an additional could be adaptive. This found widely among semelparous arthropods as a conditional strategy. We tested this...
The attractiveness of frog sounds to biting Uranotaenia mosquitoes and Corethrella midges was determined using natural synthesized sounds. traps with each species' call eight species or a series them, were set in forest Iriomote Island. Out 17 mosquito collected, macfarlanei Edwards the predominant species. Most Ur. females collected by characteristic calls which had dominant frequency about 1,000 Hz. We 23 varied spectrum (original burst, sinusoidal, noise), wave form, repeated rhythm,...