Bellymount enables longitudinal, intravital imaging of abdominal organs and the gut microbiota in adult <i>Drosophila</i>

by Leslie Ann Jaramillo Koyama, Andrés Aranda-Díaz, Yu-Han Su, Shruthi Balachandra, Judy Lisette Martin, William B. Ludington, Kerwyn Casey Huang, Lucy Erin O’Brien

Cell- and tissue-level processes often occur across days or weeks, but few imaging methods can capture such long timescales. Here, we describe Bellymount, a simple, noninvasive method for longitudinal imaging of the Drosophila abdomen at subcellular resolution. Bellymounted animals remain live and intact, so the same individual can be imaged serially to yield vivid time series of multiday processes. This feature opens the door to longitudinal studies of Drosophila internal organs in their native context. Exploiting Bellymount’s capabilities, we track intestinal stem cell lineages and gut microbial colonization in single animals, revealing spatiotemporal dynamics undetectable by previously available methods.

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