Biology:Moraxella lacunata
| Moraxella lacunata | |
|---|---|
Scientific classification 
| |
| Domain: | Bacteria |
| Phylum: | Pseudomonadota |
| Class: | Gammaproteobacteria |
| Order: | Pseudomonadales |
| Family: | Moraxellaceae |
| Genus: | Moraxella |
| Species: | M. lacunata
|
| Binomial name | |
| Moraxella lacunata (Eyre 1900) Lwoff 1939 (Approved Lists 1980)
| |
Moraxella lacunata is a rod-shaped,[1] Gram-negative, nonmotile bacterium, generally present as diploid pairs.[2] It causes one of the commonest forms of catarrhal conjunctivitis.[3]
History
Moraxella lacunata was first described independently by Victor Morax (1896) and Theodor Axenfeld (1897), hence the alternate name "Morax-Axenfeld diplobacilli" and the name of eye infection in humans is sometimes called Morax-Axenfeld conjunctivitis.[2]
Characters
It has the ability to change its morphology in laboratory. M. lacunata became shorter and tended to lose its Gram-negative staining characteristic when left out for 5 days. It also tended to retain these new characteristics on subsequent blood-agar transfers.[4]
Clinical significance
Infection occurs mainly in adults, but can occur at any age. It is characterized by:
- Chronic, mild angular blepharoconjunctivitis frequently localized on the lid at the outer canthus
- Typical erythema of the edges of the lids
- Slight maceration of the skin, most marked at the angles, especially the outer canthus
- Superficial infiltration of the cornea is not uncommon.[3]
- The discharge is grayish yellow, adherent to the lashes, and accumulates mainly at the angles.[5]
References
- ↑ "Medical Definition of MORAX-AXENFELD BACILLUS". http://www.merriam-webster.com/medical/morax-axenfeld%20bacillus.
- ↑ 2.0 2.1 Brenner, Don J.; Krieg, Noel R.; Staley, James R. (14 December 2007). Bergey's Manual® of Systematic Bacteriology: Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria. Springer Science & Business Media. ISBN 9780387280226. https://books.google.com/books?id=5zSYmcq0GdgC&dq=morax%20axenfeld%20bacillus%20gram%20negative&pg=PA412.
- ↑ 3.0 3.1 Zhulin, Denis Larionov & Alexander. "Read the eBook The pathology of the eye (Volume 1) by John Herbert Parsons online for free (page 6 of 38)". http://www.ebooksread.com/authors-eng/john-herbert-parsons/the-pathology-of-the-eye-volume-1-ala/page-6-the-pathology-of-the-eye-volume-1-ala.shtml.
- ↑ Horwich, Harry; Fedukowicz, Helena (1 October 1955). "Variations in Morax-Axenfeld Diplobacillus". AMA Arch Ophthalmol 54 (4): 580–585. doi:10.1001/archopht.1955.00930020586011. PMID 13257988.
- ↑ TERMIUM®, Government of Canada, Public Works and Government Services Canada, Translation Bureau. "tumefaccion [2 records - TERMIUM Plus® — Search - TERMIUM Plus®"]. http://www.termiumplus.gc.ca/tpv2alpha/alpha-eng.html?lang=eng&i=1&index=alr&srchtxt=tumefaccion&where=(vpen_advanced,vpfr_advanced,vpes_advanced,vppt_advanced%20inc%20'tumefaccion'%20)&dom=NED&comencdomnsubj=.
External links
Wikidata ☰ Q6909420 entry
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