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Arboviral Encephalitis

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...

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Resting Habitat, Blood Meal Source And Viral Infection Rate Of Aedes Aegypti (diptera: Culicidae) In The Southern Afar Region Of Ethiopia.

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Resting Habitat, Blood Meal Source And Viral Infection Rate Of Aedes Aegypti (diptera: Culicidae) In The Southern Afar Region Of Ethiopia.

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Resting habitat, blood meal source and viral infection rate of Aedes aegypti (Diptera: Culicidae) in the Southern

Mohammed Seid^1,2, Esayas Aklilu³, Yohannes Negash³

¹Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia. m.seid83@yahoo.com.

BMC Infectious Diseases

|March 13, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Outdoor resting Aedes aegypti mosquitoes were most prevalent in tyres during the wet season in Afar Region. Targeted management, including tyre removal, is recommended to prevent Aedes-borne disease transmission.

Keywords:

Aedes aegypti Afar Region Blood meal Chikungunya Dengue viruses Ethiopia Resting behavior

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Published on: July 28, 2022

Area of Science:

Medical entomology
Public health
Vector-borne disease control

Background:

Understanding Aedes species distribution and virus susceptibility is key to preventing arbovirus transmission.
This study investigated Aedes aegypti resting behavior, blood sources, and viral status in Afar Region, Ethiopia.

Purpose of the Study:

To determine the resting behavior, blood meal sources, and viral infection status of Aedes aegypti.
To inform strategies for controlling Aedes-borne diseases in the Afar Region.

Main Methods:

Adult mosquitoes were collected indoors and outdoors using a Prokopack aspirator.
Aedes aegypti were identified, and their blood meal sources (human, bovine) were analyzed using ELISA.
Dengue and chikungunya virus presence was assessed using RT-qPCR.

Main Results:

Aedes aegypti constituted 52.2% of the collected mosquitoes, with the highest proportion in Awash Sebat.
Outdoor resting Aedes aegypti were predominantly found in tyres (37.29%), especially during the wet season (August-October 2022).
Human blood meals were the primary source (36.6%), and no dengue or chikungunya viruses were detected.

Conclusions:

Outdoor resting sites, particularly tyres, are crucial for Aedes aegypti proliferation during the wet season.
Targeted outdoor management strategies, such as tyre removal, are recommended to mitigate Aedes-borne disease transmission risks.