Current Arboviral Threats and Their Potential Vectors in Thailand

Raksakoon, Chadchalerm; Potiwat, Rutcharin

doi:10.3390/pathogens10010080

Cited by 17 publications

(12 citation statements)

References 94 publications

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“…Culex quinquefasciatus is a primary vector of lymphatic filariasis disease, which has caused serious negative social, economic, and health impacts in tropical and subtropical countries [ 38 ]. A report in Thailand revealed that this mosquito species is able to transmit several other medically important pathogens, such as Japanese encephalitis, West Nile virus, Zika virus, and Tembusu virus [ 39 ].…”

Section: Discussionmentioning

confidence: 99%

UV Light-Emitting-Diode Traps for Collecting Nocturnal Biting Mosquitoes in Urban Bangkok

Pimnon

Ngoen-Klan

Sumarnrote

et al. 2022

Insects

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Well-designed surveillance systems are required to facilitate a control program for vector-borne diseases. Light traps have long been used to sample large numbers of insect species and are regarded as one of the standard choices for baseline insect surveys. The objective of this study was to evaluate the efficacy of six ultraviolet light-emitting diodes and one fluorescent light for trapping urban nocturnal mosquito species within the Kasetsart University (KU), Bangkok. Ultraviolet light-emitting diodes (UV-LEDs), (LED365, LED375, LED385, LED395, and LED405) and a fluorescent light were randomly assigned to six different locations around the campus in a Latin square design. The traps were operated continuously from 18:00 h to 06:00 h throughout the night. The traps were rotated between six locations for 72 collection-nights during the dry and wet seasons. In total, 6929 adult mosquitoes were caught, with the most predominant genus being Culex, followed by Aedes, Anopheles, Armigeres and Mansonia. Among the Culex species, Culex quinquefasciatus (n = 5121: 73.9%) was the most abundant followed by Culex gelidus (n = 1134: 16.4%) and Culex vishnui (n = 21: 0.3%). Small numbers of Aedes, Armigeres, and Anopheles mosquitoes were trapped [Aedes albopictus (n = 219: 3.2%), Aedes pocilius (n = 137: 2.0%), Armigeres subalbatus (n = 97: 1.4%), Anopheles vagus (n = 70: 1.0%), Aedes aegypti (n = 23: 0.3%)]. There were 2582 specimens (37.2%) captured in fluorescent light traps, whereas 942 (13.6%), 934 (13.5%), 854 (12.3%), 820 (11.8%), and 797 (11.5%) were captured in the LED375, LED405, LED395, LED365, and LED385 traps, respectively. None of the UV-LED light traps were as efficacious for sampling nocturnal mosquito species as the fluorescent light trap. Among the five UV-LED light sources, LED375 trapped the greatest number of mosquitoes. Additional field trials are needed to validate these findings in different settings in order to substantially assess the potential of the LEDs to trap outdoor nocturnal mosquitoes.

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Section: Discussionmentioning

confidence: 99%

UV Light-Emitting-Diode Traps for Collecting Nocturnal Biting Mosquitoes in Urban Bangkok

Pimnon

Ngoen-Klan

Sumarnrote

et al. 2022

Insects

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“…Around 1000 species of sandflies have been identified with the arbovirus-relevant species found within two genera: Phlebotomus and Lutzomyia [63]. Although more commonly vectors for parasitic diseases like Leishmaniasis, infected female sandflies can transmit phleboviruses during blood feeding, and cases are often found clustered geographically during an outbreak [64].…”

Section: Sandfliesmentioning

confidence: 99%

Arboviruses: How Saliva Impacts the Journey from Vector to Host

Schneider

Calvo

Peterson

2021

IJMS

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Arthropod-borne viruses, referred to collectively as arboviruses, infect millions of people worldwide each year and have the potential to cause severe disease. They are predominately transmitted to humans through blood-feeding behavior of three main groups of biting arthropods: ticks, mosquitoes, and sandflies. The pathogens harbored by these blood-feeding arthropods (BFA) are transferred to animal hosts through deposition of virus-rich saliva into the skin. Sometimes these infections become systemic and can lead to neuro-invasion and life-threatening viral encephalitis. Factors intrinsic to the arboviral vectors can greatly influence the pathogenicity and virulence of infections, with mounting evidence that BFA saliva and salivary proteins can shift the trajectory of viral infection in the host. This review provides an overview of arbovirus infection and ways in which vectors influence viral pathogenesis. In particular, we focus on how saliva and salivary gland extracts from the three dominant arbovirus vectors impact the trajectory of the cellular immune response to arbovirus infection in the skin.

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“…Arthropod-borne or arbovirus diseases are public-health concerns in many regions of the world, including Thailand. Important mosquito-borne diseases affecting humans in Thailand include dengue, chikungunya and Zika [Raksakoon & Potiwat, 2021]. However, there are currently no safe and highly effective vaccines available for preventing these diseases [Huang et al, 2023; Costa et al, 2021].…”

Section: Introductionmentioning

confidence: 99%

Knowledge, Attitude, and Practice (KAP), and Acceptance and Willingness to Pay (WTP) for Mosquito-Borne Diseases Control through Sterile Mosquito Release in Bangkok, Thailand

Pattamaporn,

Suwannapa,

Jalichandra

et al. 2024

Preprint

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BackgroundArboviral diseases such as dengue, chikungunya and Zika are public health concerns worldwide. Prevention and control of these diseases still depend on controllingAedes aegyptimosquito vectors. Sterile insect technique (SIT) and incompatible insect technique (IIT) are environmental friendly approaches that show promising impacts. In order to plan an implementation of SIT/IIT technology, the background knowledge, attitude and practice related to these diseases and their mosquito vectors in the targeted communities are needed.Methodology/Principal findingsIn this paper, we conducted the questionnaire surveys on general knowledge, attitude and practice (KAP) related to mosquito-borne diseases, mosquito vectors, as well as prevention and control in 400 sampling households in seven communities located in two districts in Bangkok, Thailand. The acceptance and willingness to pay (WTP) for sterile mosquitoes to be used as an alternative vector control approach was also investigated. Our findings indicated that the surveyed participants had high knowledge on dengue (85.25%) and they were more concerned with the severity of dengue (81%) than chikungunya (42.5%) and Zika (37%). Participants with the ages lower than 35 years old (p= 0.047) and the incomes higher than 5,000 THB (p= 0.016) had more knowledge on mosquito vectors. Moreover, 47% of respondents had positive attitude toward sterile mosquitoes and their application in vector control even though 45.5% of them had never heard about the technology. However, the majority of them were not willing to pay (52%); and if they had to pay, the maximum would be 1-2 THB per sterile mosquito, as most of them expected to receive free service from the government.Conclusions/significanceThe baseline information obtained from this questionnaire survey could be used for planning the sterile mosquito release by public health authorities in Bangkok, Thailand where dengue, chikungunya and Zika were still prevalent.Author summaryA questionnaire survey was conducted in seven communities in Bangkok, Thailand to obtain the baseline information on knowledge, attitude and practice (KAP) related to mosquito-borne diseases, i.e., dengue, chikungunya and Zika, including mosquito vectors and how to control them. The questionnaire also asked about the acceptance and willingness to pay (WTP) for sterile mosquitoes used in controlling mosquito populations. Our results showed that, from the total of 400 sampling households, about 85% of participants were familiar with dengue, the mosquito vectors as well as their prevention and control. Furthermore, participants with lower ages and higher incomes had more knowledge on mosquito vectors (p< 0.05). Even though the majority of participants showed positive perception about sterile mosquitoes release in terms of the environment, economic, social and quality of life, but more than half of them were not willing to pay for sterile mosquitoes as they would like to receive them free of charge from the government. In the case that they have to pay, the cost that they could afford was 1-2 THB per sterile mosquito. These findings should be useful for public health authorities in planning to apply the sterile mosquito release as an alternative mosquito control approach in Bangkok, Thailand.

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Current Arboviral Threats and Their Potential Vectors in Thailand

Cited by 17 publications

References 94 publications

UV Light-Emitting-Diode Traps for Collecting Nocturnal Biting Mosquitoes in Urban Bangkok

UV Light-Emitting-Diode Traps for Collecting Nocturnal Biting Mosquitoes in Urban Bangkok

Arboviruses: How Saliva Impacts the Journey from Vector to Host

Knowledge, Attitude, and Practice (KAP), and Acceptance and Willingness to Pay (WTP) for Mosquito-Borne Diseases Control through Sterile Mosquito Release in Bangkok, Thailand

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