Ultrastructural details of Cryptosporidium parvum development in calf intestine Rosales Lombardo, María José Arnedo, Teresa Mascaró Lazcano, María Carmen Cryptosporidium parvum Ultrastructure Calf intestine Zoite Meronts Macrogamont Microtubules Cryptosporidium parvum and C. muris appear to be different species found in calves, with different oocysts size and distribution on the gastrointestinal tract. This work presents new images of C. parvum ultrastructure in calf intestine, mainly its development in nonmicrovillous cells and the presence of microtubular structures in the membrane enveloping the macrogamonts and immature oocysts. 2014-07-04T10:53:42Z 2014-07-04T10:53:42Z 1998 journal article Rosales, M.J.; Arnedo, T.; Mascaró, C. Ultrastructural details of Cryptosporidium parvum development in calf intestine. Memórias do Instituto Oswaldo Cruz, 93(6): 847-850 (1998). [http://hdl.handle.net/10481/32453] 0074-0276 http://hdl.handle.net/10481/32453 10.1590/S0074-02761998000600027 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Instituto Oswaldo Cruz