File:E.coli on growing on various agar media.jpg
![File:E.coli on growing on various agar media.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/E.coli_on_growing_on_various_agar_media.jpg/800px-E.coli_on_growing_on_various_agar_media.jpg?20191027104743)
Original file (2,200 × 1,318 pixels, file size: 1.17 MB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit]DescriptionE.coli on growing on various agar media.jpg |
English: Escherichia coli grows on many commonly used cultivation media. Examples of these media are:
Fig. A1 Brain heart infusion agar (BHIA), A2 Trypticase soy agar (TSA), A3 MacConkey agar (MCA), A4 Endo agar Fig. B shows growth of a common E. coli strain on these media. Note the different size of colonies as nutriet and selective properties of these media vary. Colonies on brain heart infusion agar (B1) are larger in comparison with colonies on trypticase soy agar (B2), MacConkey (B3) and Endo agar (B4). MacConkey (Fig. C1, C4) and Endo agar (Fig. C2, C3) represent diagnostic selective media. Both of them typically inhibit growth of Gram positive bacteria and enable differentiation between lactose positive and lactose negative bacteria (E. coli is typically lactose positive).Colonies are smallest on Endo agar as this medium has higher selectivity for Enterobacteriaceae in comparison with MacConkey agar. Size of colonies is also influenced by numbers of colonies growing on a defined surface of agar medium (higher numbers usually mean smaller colonies). (Competition for nutrients) Fig. C E. coli growing on MacConkey (C1) and Endo agar (C2) in comparison with Klebsiella pneumoniae (C3 MacConkey, C4 Endo). Both of them are lactose positive. Fig. D, G, H Colonies of lactose-negative and positive E. coli on MacConkey agar. E. coli strains are typically lactose positive. Colonies apperaing lactose-negative are usually delayed lactose fermentors giving positive ONPG test. Fig. E Staphylococcus aureus (yellow), Enterococcus faecalis (small) and E. coli on trypticase soy agar after 24 h at 37°C. Seen with reflected light. Fig. F E. coli and Pseudomonas aeruginosa (smaller greenish colonies) in mixed culture on brain heart infusion agar. 24 h, 37°C, seen with both reflected and transmitted light. Fig. I E. coli and Klebsiella pneumoniae (larger), yellow, lactose-positive colonies on CLED agar. Bluish lactose-negative colonies of Serratia marcescens. Fig. J Lactose-fermenting colonies of E.coli with a gold metallic sheen on Endo agar. |
Date | |
Source | Own work |
Author | HansN. |
Licensing
[edit]![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
![share alike](https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Cc-sa_white.svg/24px-Cc-sa_white.svg.png)
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 10:47, 27 October 2019 | ![]() | 2,200 × 1,318 (1.17 MB) | New HanseN. (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
- Usage on ja.wikipedia.org