Microorganisms of the microsporidia group are obligated intracellular protozoa 
that belong to the phylum Microspora; currently they are considered to be 
related or belong to the fungi reign. It is considered an opportunistic 
infection in humans, and 14 species belonging to 8 different genera have been 
described. Immunocompromized patients such as those infected with human 
immunodeficiency virus (HIV), also HIV serum-negative asymptomatic patients, 
with poor hygienic conditions, and recipients of bone marrow or solid organ 
transplantation are susceptible to develop deinfection. Sixty transplanted 
patients with renal microsporidia infection have been reported worldwide. The 
aim of this paper is to inform about the 2nd case of kidney transplant and 
microsporidia infection documented in Mexico.