Fluorescence-based techniques have been used extensively in the malaria field to study the functional role of nuclear organization and gene positioning in blood stages of the human malaria parasite, Plasmodium falciparum . In this chapter, we present optimized protocols for bromouridine (BrUTP) incorporation into nascent RNA in live parasites and fluorescent in situ hybridization (FISH) in fixed parasites. Methodology to perform various combinations of the FISH assay, as well as a basic approach for quantitative analysis of nuclear position, is also described.