DENV-2 tropisms in different tissues and organs of Aedes aegypti. DENV-2 viral E antigen distribution in different tissues and organs was revealed by IFA (green for FITC or Alexa 488) in Chetumal mosquitoes (n = 20). A) DENV-2 antigen in fat body of mosquito abdomen at 2 dpi. B) DENV-2 infected epithelial cells in midgut (4 dpi). C) DENV-2 is present in epithelial cells but absent in midgut-associated muscle (red phalloidin-Alexa® 546). D) DENV-2 in anterior midgut at 5 dpi. E) Infected esophagus at 7 dpi, dr.dv. dorsal diverticulum, car: cardia, oe: esophagus, and cr: crop. F) Hemocytes infected with DENV-2 at 10 dpi. G) Ommatidia of the compound eye exhibiting viral antigen at 12 dpi. H) Nervous system tissue profusely infected by DENV-2 at 14 dpi. I) Malphigian tubules expressing viral antigen (Mal. Tu.) at 16 dpi, il: ileum. These pictures represent the infection patterns observed. Original magnification was 200×, but pictures were cropped in Adobe Photoshop to improve presentation.