Document 0254
 DOCN  M9650254
 TI    Comparative development of two microsporidian species: Enterocytozoon
       bieneusi and Enterocytozoon salmonis, reported in AIDS patients and
       salmonid fish, respectively.
 DT    9605
 AU    Desportes-Livage I; Chilmonczyk S; Hedrick R; Ombrouck C; Monge D; Maiga
       I; Gentilini M; Inserm U. 313, Complexe Hospitalier Universitaire;
       Pitie-Salpetriere, Paris, France.
 SO    J Eukaryot Microbiol. 1996 Jan-Feb;43(1):49-60. Unique Identifier :
       AIDSLINE MED/96151460
 AB    Enterocytozoon bieneusi and Enterocytozoon salmonis are reported in
       HIV-infected patients and in salmonid fish, respectively. Both species
       share the early development of the extrusion apparatus of the spores,
       which is completed prior to fission of the sporogonic syncytium into
       sporoblasts, and the early synthesis of polar tube constituents, but
       they differ in other developmental and sporogenetic processes.
       Enterocytozoon bieneusi develops in direct contact with the cytoplasm of
       epithelial cells whereas E. salmonis occurs only in the nucleus of
       leucocytes and epithelioid cells. Sporogonic nuclei, which are scattered
       throughout the sporont in E. bieneusi, are located in the periphery in
       E. salmonis. The multilamellar structures associated with the nuclear
       envelopes and the endoplasmic reticulum cisternae are specific for E.
       bieneusi. Additionally, the evolution of the polar tube precursors
       proceeds differently in the two parasites. In E. bieneusi, they
       transform into electron-dense bodies associated with a reticulum and
       polar tubes derive from these structures according to a process similar
       to that reported in other microsporidia.In E. salmonis, polar tube
       precursors fuse directly at their ends and the polar tubes appear to be
       formed by the assemblage of these fused precursors with a material
       previously synthesized in the vicinity of nuclei. In conclusion, both
       species appear to be less closely related than was supposed in earlier
       descriptions.
 DE    Acquired Immunodeficiency Syndrome/COMPLICATIONS/*PARASITOLOGY  Animal
       Comparative Study  Duodenum/PARASITOLOGY  Fish Diseases/*PARASITOLOGY
       Human  Microspora Infections/COMPLICATIONS/*PARASITOLOGY
       Microsporida/*GROWTH & DEVELOPMENT/ULTRASTRUCTURE  Oncorhynchus
       mykiss/PARASITOLOGY  Salmon/PARASITOLOGY  Salmonidae/*PARASITOLOGY
       Support, Non-U.S. Gov't  JOURNAL ARTICLE

       SOURCE: National Library of Medicine.  NOTICE: This material may be
       protected by Copyright Law (Title 17, U.S.Code).