development of symbiont in host procyclogenesis https://github.com/geneontology/go-ontology/issues/21898 2021-08-03T19:53:17Z The morphological, biochemical and genetic changes that induce the differentiation of bloodstream form trypomastigotes into procyclic trypomastigotes in some of the Trypanosomatidae species such as Trypanosoma brucei. This process occurs inside the midgut of the tsetse fly vectors in T. brucei. krc GO:0120324 biological_process