Introduction
Table of Contents
Enterobacter aerogenes is a Risk Group 2 organism and is responsible for nosocomial infection, human and animal diseases and normally present in the gut of vertebrates and also in the environment and thus it may be the organism of concern for on health scheme. Classification of bacterium is as follows-
- Kingdom: Bacteria
- Phylum: Proteobacteria
- Class: Gammaproteobacteria
- Order: Enterobacteriales
- Family: Enterobacteriaceae
- Genus: Enterobacter
- Species: Enterobacter aerogenes
E. aerogenes is a member of a family, Enterobacteriaceae and it is a Gram-negative, motile, straight rod, a non-spore-forming, and capsulated bacterium. A colony is normally circular, raised, and moist with an entire margin and vary from beige to off-white and it forms a large, mucoid, pink colony like Klebsiella on MacConkey medium. It can cause a variety of clinical conditions in the human-like eye and skin infections, meningitis, bacteremia, pneumonia, and urinary tract infections.
Biochemical Reactions of Enterobacter aerogenes
| Basic Features | Properties |
| 1. Gram Staining | Gram-Negative Rods (GNRs) |
| 2. Spore | Non-Sporing |
| 3. Capsule | Positive |
| 4. Motility | Positive |
| 5. Pigment | Negative |
| 6. Growth in potassium cyanide (KCN) medium | Positive |
| 7. Catalase test | Positive |
| 8. Oxidase test | Negative |
| 9. Nitrate reduction test | Positive |
| 10. MR (Methyl Red) test | Negative |
| 11. VP (Voges- Proskauer) assay | Positive |
| 12. OF (Oxidative-Fermentative) test | Fermentative |
| 13. Gas | Positive |
| 14. H2S production | Negative |
| 15. Indole formation | Negative |
| 16. Urease/ urea hydrolysis test | Negative |
| 17. Citrate/ citrate utilization | Positive |
| 18. DNase test | Negative |
| 19. Glucose fermentation | Positive |
| 20. Maltose fermentation | Positive |
| 21. Lactose fermentation | Positive |
| 22. Sucrose fermentation | Negative |
| 23. Xylose fermentation | Positive |
| 24. Mannitol fermentation | Positive |
| 25. Gamma-Glutamyl transferase | Positive |
| 26. ONPG (β-galactosidase) | Positive |
| 27. Phenylalanine Deaminase (PDA)/PPA Test | Negative |
| 28. Tetrathionate reductase | Negative |
| 29. Esculin Hydrolysis test | Positive |
| 30. Lysine Decarboxylase Test | Positive |
| 31. Ornithine Decarboxylase Test | Positive |
| 32. Arginine Dihydrolase Test | Negative |
Keynotes on Enterobacter
- Enterobacter aerogenes is naturally gut flora of many vertebrates.
- Newly Named Klebsiella aerogenes is previous Enterobacter aerogenes.
- It is named Klebsiella aerogenes due to following features- based on numerical taxonomy (Bascom et al. 1971) and phylogenetic analyses of Enterobacteriaceae based on 16S ribosomal RNA (rRNA) gene sequences and gyrB sequence alignments , MALDI-TOF Biotyper analysis and in silico DNA-DNA hybridization which proved a higher similarity between Enterobacter aerogenes and members of the genus Klebsiella than between Enterobacter aerogenes and other members of the genus Enterobacter.
E. aerogenes Footages
E. aerogenes colony morphology on MacConkey agar
Enterobacter biochemical tests in TSI, MIU and Citrate agar
E. aerogenes antimicrobial susceptibility testing (AST) pattern Demo
AST Pattern
Further Readings
- https://www.canada.ca/en/environment-climate-change/services/evaluating-existing-substances/screening-assessment-enterobacter-aerogenes.html
- Bergey’s Manual of Systematic Bacteriology [3] : Volume 2: The Proteobacteria , Part B: The Gammaproteobacteria
- https://www.sciencedirect.com/topics/medicine-and-dentistry/enterobacter-aerogenes
- https://microbewiki.kenyon.edu/index.php/Enterobacter_aerogenes
- https://eol.org/pages/972692/details
- https://www.ncbi.nlm.nih.gov/books/NBK8035/
- https://www.msdsonline.com/resources/sds-resources/free-safety-data-sheet-index/enterobacter-spp/https://catalog.hardydiagnostics.com/cp_prod/Content/hugo/Enterobacter.htm
- https://pubmed.ncbi.nlm.nih.gov/32493786/
- http://legacy.bd.com/ds/technicalCenter/inserts/L007471(06)(0506).pdf
- https://www.sciencedirect.com/science/article/pii/S2352771419300382
It’s perfect time to make some plans for the future and it is time to be happy. I’ve read this post and if I could I want to suggest you few interesting things or advice. Maybe you can write next articles referring to this article. I want to read more things about it!
Excellent beat ! I would like to apprentice while you amend your web site, how can i subscribe for a blog web site? The account aided me a acceptable deal. I had been tiny bit acquainted of this your broadcast offered bright clear concept
Hеllo I am so grateful І found your blog,
I really fօund you by aсcident, while I was browsing on Digg for something else,
Nonetheleѕs I am here now and would just like to say thanks for a tremendous post
ɑnd a all round enjoyable blog (I also love the theme/design), I don’t havе time to browse it all at the
moment but I hаve book-marked it and aⅼso added your RSS feeds, so when I have time I will be back
to read a lot more, Pleаse do keep uρ the superb jo.
I genuinely enjoy looking at on this website , it holds fantastic content.
You should participate in a contest for among the finest blogs on the web. I’ll suggest this site!
I respect your piece of work, appreciate it for all the useful blog posts.
It?¦s actually a great and useful piece of information. I?¦m glad that you shared this helpful info with us. Please keep us informed like this. Thank you for sharing.
Thankyou for all your efforts that you have put in this. very interesting information.
The article has truly peaked my interest. I will take a note of your site and keep checking for new information about once per week have learn several just right stuff here 무료스포츠중계 I’m not that much of a internet reader to be honest but your sites really
nice, keep it up! I’ll go ahead and bookmark your site to come back
later on. Cheers!!!
It’s remaгkable in support of me to have a web page, which is
helpful deѕigned for my experience. thanks admin
Wow! Thank you! I continuously wanted to write on my site something like that. Can I take a fragment of your post to my website?
obviously like your web site however you need to check the spelling on several of your posts. A number of them are rife with spelling problems and I in finding it very troublesome to tell the reality nevertheless I’ll certainly come again again.
Very neat blog.Thanks Again. Will read on…
zestoretic medication
Looking forward to reading more. Great post.Thanks Again. Will read on…
can you buy lyrica online
Wow! This can be one particular of the most beneficial blogs We have ever arrive across on this subject. Basically Excellent. I’m also an expert in this topic therefore I can understand your hard work.
Many thanks , I’ve just been in search of information about this topic for quite a while and yours is the best I’ve found out till now. But, what with regard on the summary? Are you presently favourable with regard to the supply?
In fact no matter if someone doesn’t understand after that itsup to other users that they will assist, so hereit happens.
Hi! Someone in my Facebook group shared this site with us so I came to give it a look. I’m definitely loving the information. I’m bookmarking and will be tweeting this to my followers! Great blog and superb style and design.
I think this is a real great blog article. Cool.
Thanks for sharing, this is a fantastic article.Much thanks again.
Good write-up, IЎ¦m normal visitor of oneЎ¦s blog, maintain up the nice operate, and It is going to be a regular visitor for a long time.
Howdy! I could have sworn Iíve been to your blog before but after looking at many of the articles I realized itís new to me. Anyways, Iím certainly happy I came across it and Iíll be bookmarking it and checking back regularly!
Great, thanks for sharing this article.Really looking forward to read more. Really Cool.
Superb info. Thank you! losartan hydrochlorothiazide
vantin cost
Real nice pattern and good content material , nothing at all else we require : D.
Piece of writing writing is also a excitement, ifyou be familiar with afterward you can write otherwise it is complicatedto write.