Evaluating Mosquitoes for Insecticide Resistance
Centers for Disease Control and Prevention
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 About this course

 Disease Vectors

 Strategies for Resistance Management

 Bottle Bioassay
 Larval Bioassay
 Microplate Assay
 Interpretation of Results

 Case Studies

 Links and resources

 Companion Materials

 (Glossary Explained)This term is defined in the glossary.





Using the Diagnostic Dosage to Detect Resistance

The data plot for the diagnostic dosage for a particular mosquito species and insecticide is plotted on all experimental graphs as a benchmark or standard.

The data from an experimental population (or multiple populations) are plotted on the same graph.

The threshold for resistance is defined as the upper range limit of the susceptible population, in other words, that time interval where 100 % mortality occurs.

The percentage of mosquitoes still alive in a test population at the threshold is defined as the percentage of resistant individuals.

In the sample shown (Figure 2), the level of resistance is X %.

Figure 2


Test populations are directly compared with a reference susceptible population.

In most field populations, both susceptible and resistant mosquitoes occur. These assays allow m

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This page last reviewed July 3, 2001

Centers for Disease Control and Prevention
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