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Ultrastructure of Cryptosporidium parvum Oocysts and Excysting Sporozoites as Revealed by High Resolution Scanning Electron Microscopy 1
Author(s) -
REDUKER DAVID W.,
SPEER C. A.,
BLIXT JOHN A.
Publication year - 1985
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1985.tb03106.x
Subject(s) - cryptosporidium parvum , ultrastructure , scanning electron microscope , electron microscope , biology , microbiology and biotechnology , spheroid , anatomy , optics , in vitro , physics , biochemistry
Cryptosporidium parvum oocysts isolated from calf feces were examined by scanning electron microscopy during excystation. Intact C. parvum oocysts were spheroid to ellipsoid, ≅3.5 × 4.0 μm, with length: width ratio = 1.17. The oocyst wall had a single suture at one pole, which spanned 1/3 to 1/2 the circumference of the oocyst. During excystation the suture dissolved, resulting in a slit‐like opening, which the sporozoites used to exit the oocyst. Sporozoites were 3.8 times 0.6 μm and had a rough outer surface.