Endocytosis in Trypanosoma cruzi (Euglenozoa: Kinetoplastea) epimastigotes: Visualization of ingested transferrin-gold nanoparticle complexes by confocal laser microscopy

► Gold nanoparticles coupled to transferrin could be imaged by confocal microscopy. ► The gold biomarker accumulated in endocytic organelles of Trypanosoma cruzi. ► Intracellular gold labeling was evident at the cytopharynx and the reservosomes. ► Intracellular gold clusters could be seen by reflection or photoluminescence modes.