Loop-Mediated Isothermal Amplification Assay to Detect Invasive Malaria Vector Anopheles stephensi Mosquitoes
Cristina Rafferty, Gloria Raise, JeNyiah Scaife, Bernard Abongo, Seline Omondi, Sylvia Milanoi, Margaret Muchoki, Brenda Onyango, Eric Ochomo, and Sarah Zohdy
Author affiliations: US President’s Malaria Initiative, Centers for Disease Control and Prevention, Atlanta, Georgia, USA (C. Rafferty, S. Zohdy); Centers for Disease Control and Prevention, Atlanta (C. Rafferty, G. Raise, J. Scaife, S. Zohdy); Kenya Medical Research Institute (KEMRI), Kisumu, Kenya (B. Abongo, S. Omondi, S. Milanoi, M. Muchoki, B. Onyango, E. Ochomo)
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Figure 3
Figure 3. Schematic for colorimetric loop-mediated isothermal amplification assay to detect invasive malaria vector Anopheles stephensi mosquitoes. Top: DNA from any mosquito source directly placed in the colorimetric master mix are incubated at 65°C for 30 minutes to obtain a yellow color change, showing a positive sample. The assay shows high sensitivity and specificity when DNA extract from adult or larval mosquitoes is used. Bottom: Assay can also be used directly on a single mosquito leg, without the need for DNA extraction, by adding a 5-minute extension to incubation time (i.e., 35 minutes). Schematic produced using Biorender (https://www.biorender.com).
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