Ultrastructure of the Adhesion of Crithidia guilhermei (Kinetoplastida: Trypanosomatidae) to Plastic Coverslips: Formation of a Fibrous Matrix Around the Cells Leia mais sobre Ultrastructure of the Adhesion of Crithidia guilhermei (Kinetoplastida: Trypanosomatidae) to Plastic Coverslips: Formation of a Fibrous Matrix Around the Cells