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Forced Salivation As a Method to Analyze Vector Competence of Mosquitoes
Published on: August 7, 2018
Effects of absence of saliva on blood feeding by mosquitoes
Abstract:
The salivary glands of Aedes stimulans (Walker) are the source of an antigen which produces typical bite reactions in men and laboratory rabbits. If the main salivary duct is cut, the reaction is not produced when the mosquito bites. Lack of saliva does not affect the intake or movement of blood into the mid-gut, nor does it prevent the development of eggs. The presence of ain a-nesthetic component in saliva is suggested.
Insights
The salivary glands of Aedes stimulans mosquitoes contain an antigen causing bite reactions. Cutting the salivary duct prevents these reactions, suggesting saliva
Area of Science:
- Entomology
- Immunology
- Vector-borne Diseases
Background:
- Aedes stimulans mosquitoes are known vectors.
- Mosquito bites can elicit reactions in hosts.
- The specific components of mosquito saliva responsible for host reactions are not fully understood.
Purpose of the Study:
- To identify the source of antigens responsible for Aedes stimulans bite reactions.
- To investigate the role of mosquito saliva in eliciting host responses.
- To determine if saliva is essential for blood feeding and subsequent egg development.
Main Methods:
- Studied the salivary glands of Aedes stimulans.
- Performed experiments involving cutting the main salivary duct of the mosquito.
- Observed and recorded host reactions (in humans and rabbits) following mosquito bites.
- Assessed blood intake and egg development in mosquitoes with and without intact salivary ducts.
Main Results:
- Salivary glands of Aedes stimulans produce an antigen that causes typical bite reactions.
- Cutting the main salivary duct prevented the elicitation of bite reactions.
- Saliva was not essential for blood meal uptake, blood flow to the mid-gut, or egg development.
Conclusions:
- The antigen responsible for Aedes stimulans bite reactions originates from the salivary glands.
- Saliva plays a critical role in the host's bite reaction.
- An anesthetic component in the saliva of Aedes stimulans is suggested.

