Related Experiment Video
Updated: Sep 12, 2025
08:24
Inoculating Anopheles gambiae Mosquitoes with Beads to Induce and Measure the Melanization Immune Response
Published on: January 12, 2017
8.1K
Fluctuating Warm and Humid Conditions Differentially Impact Immunity and Development in the Malaria Vector Anopheles
Thais Lemos-Silva1, Emma De Neef1, Yarno Valgaerts1
1Department of Biomedical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium.
Global Change Biology
|August 5, 2025
Summary
Realistic climate fluctuations prime mosquito immunity and accelerate development. However, subsequent immune suppression may increase malaria transmission risk, impacting vector control strategies.
Area of Science:
- Environmental science
- Immunology
- Vector biology
Background:
- Environmental factors like temperature and humidity affect mosquito immunity and behavior.
- Climate change impacts mosquito distribution, necessitating studies on environmental effects.
- Existing research often uses unrealistic static environmental conditions.
Purpose of the Study:
- Investigate the impact of realistic elevated temperature and humidity fluctuations on mosquito innate immunity.
- Assess effects on Anopheles stephensi development, longevity, and immune gene expression.
- Evaluate the environmental sensitivity of genetic modification strategies for mosquito control.
Main Methods:
- Exposed Anopheles stephensi (egg to adult) to diurnal temperature and humidity fluctuations.
- Analyzed innate immune gene expression, pre-adult development, and adult lifespan.
- Conducted bacterial infections to assess immune response and survival under fluctuating conditions.
Main Results:
- Elevated fluctuating conditions primed basal immune responses and accelerated development without reducing lifespan.
- Bacterial infections induced complex immune reprogramming and enhanced survival in larvae and adults.
- Fluctuating conditions altered the activity of promoters used in genetically modified mosquitoes.
Conclusions:
- Realistic environmental variability influences mosquito immunity and development.
- Elevated conditions may initially reduce vector capacity but could later increase susceptibility to Plasmodium.
- Accurate prediction of climate change impacts on disease transmission requires incorporating environmental variability in research.
Related Concept Videos
01:26Factors Affecting the Risk of Infection
12.3K
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
12.3K
02:27Background and Environment Affect Phenotype
6.7K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.7K