Image:Microsporidiosis 01.png

From Wikipedia, the free encyclopedia

Image
File history
File links

Size of this preview: 457 × 600 pixel
Image in higher resolution (2400 × 3150 pixel, file size: 522 KB, MIME type: image/png)

Life cycle of the various agents responsible for microsporidiosis.

Description

The infective form of microsporidia is the resistant spore and it can survive for a long time in the environment.
The spore extrudes its polar tubule and infects the host cell.
The spore injects the infective sporoplasm into the eukaryotic host cell through the polar tubule.
Inside the cell, the sporoplasm undergoes extensive multiplication either by merogony (binary fission) or schizogony (multiple fission).
This development can occur either in direct contact with the host cell cytoplasm (e.g., E. bieneusi) or inside a vacuole termed parasitophorous vacuole (e.g., E. intestinalis). Either free in the cytoplasm or inside a parasitophorous vacuole, microsporidia develop by sporogony to mature spores.
During sporogony, a thick wall is formed around the spore, which provides resistance to adverse environmental conditions. When the spores increase in number and completely fill the host cell cytoplasm, the cell membrane is disrupted and releases the spores to the surroundings.
These free mature spores can infect new cells thus continuing the cycle.

Obtained from the CDC Public Health Image Library.

Image credit: CDC/Alexander J. da Silva, PhD/Melanie Moser. (PHIL #3411), 2002.

[edit] Licensing

This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services. As a work of the U.S. federal government, the image is in the public domain.

Images from the Centers for Disease Control and Prevention are candidates to be copied to the Wikimedia Commons using the Transwiki process.

Wikipedia is not a collection of photographs or media files and appropriately licensed media are more accessible to other Wikimedia projects if placed on Commons.
Once this image is moved to the Commons, append |commons={{subst:ncd}} to this copyright tag.

File history

Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version.
Click on date to download the file or see the image uploaded on that date.

(del) (cur) 04:29, 7 March 2006 . . MarcoTolo (Talk | contribs) . . 2400×3150 (534,996 bytes) (Life cycle of the various agents responsible for '''''microsporidiosis'''''. Obtained from the CDC [http://phil.cdc.gov/phil/home.asp Public Health Image Library]. Image credit: CDC/Alexander J. da Silva, PhD/Melanie Moser. (PHIL #3411), 2002. == L)