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giardia_pg1
Course: CVM 6202, Fall 2008School: Minnesota
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OF IDENTIFICATION GIARDIA CYSTS NUCLEI: Two or four nuclei per cyst depending on the stage of development. Each cyst contains a dark colored karyosome giving the nuclei the appearance of eyes. Nuclei AXONEMES: One or two rod shaped structures per cyst. MEDIAN BODIES: Two or four comma shaped structures per cyst. Axonemes Median Bodies MORPHOLOGY OF GIARDIA CYST PHOTOMICROGRAPHS OF GIARDIA CYSTS FROM A ZINC...
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OF IDENTIFICATION GIARDIA CYSTS
NUCLEI: Two or four nuclei per cyst depending on the stage of development. Each cyst contains a dark colored karyosome giving the nuclei the appearance of eyes. Nuclei AXONEMES: One or two rod shaped structures per cyst. MEDIAN BODIES: Two or four comma shaped structures per cyst.
Axonemes
Median Bodies
MORPHOLOGY OF GIARDIA CYST
PHOTOMICROGRAPHS OF GIARDIA CYSTS FROM A ZINC SULFATE CENTRIFUGAL FLOTATION
100X
INDENTATIONS
100X
100X
100X
The subtle characteristics of the nuclei, axonemes, and median bodies are often more easily observed under 100X oil immersion magnification. Also note the crescent-shaped indentations as seen on the second from plate the left.
10X
20X
At lower magnifications (10X and 20X) The cysts can be seen floating directly under the coverslip. Because of their relatively small size they appear to be in their own focal plane.
STRUCTURES OFTEN CONFUSED WITH GIARDIA CYSTS
YEAST BODY SACCHAROMYCOPSIS GUTTULATUS SARCOCYSTIS SPP. SPOROCYST CRYPTOSPORIDIUM SP. OOCYST
100X
100X
100X
100X
Giardia cysts are often confused w...
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