HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Truberg Jensen, K. Articles by Brenner, D. J. Search for Related Content PubMed Articles by Truberg Jensen, K. Articles by Brenner, D. J. Agricola Articles by Truberg Jensen, K. Articles by Brenner, D. J.

Recognition of Morganella Subspecies, with Proposal of Morganella morganii subsp. morganii subsp. nov. and Morganella morganii subsp. sibonii subsp. nov.

¹Department of Clinical Microbiology, Statens Seruminstitut, Copenhagen, Denmark
²Enteric Diseases Branch, Hospital Infections Program, National Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia 30333
³Meningitis and Special Pathogens Branch, Hospital Infections Program, National Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia 30333
⁴Division of Bacterial and Mycotic Diseases, and Nosocomial Infections Laboratory Branch, Hospital Infections Program, National Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia 30333

^* Corresponding author.

ABSTRACT

The genus name Morganella was established within the family Enterobacteriaceae in 1978. Morganella morganii is the only species described thus far within this genus, and the name M. morganii has been accepted by usage in the scientific community for strains previously known as Proteus morganii. M. morganii isolates differ in their abilities to ferment trehalose and exhibit variable lysine and ornithine decarboxylase patterns, emphasizing the phenotypic heterogeneity within this species. Previous genetic studies failed to reveal separate entities within the genus Morganella. We observed some trehalose-fermenting strains with different lysine and ornithine decarboxylase patterns. Two strains were lysine and ornithine positive, 3 were lysine positive and ornithine negative, and 29 were lysine negative and ornithine positive. These strains and 25 non-trehalose-fermenting strains with different lysine and ornithine decarboxylase patterns were investigated. DNA-DNA hybridization studies and phenotypic characterizations revealed that M. morganii can be separated into three DNA relatedness groups and seven biogroups. Strains from DNA relatedness group 1 were trehalose negative, and strains from DNA relatedness groups 2 and 3 were trehalose positive. One biogroup from DNA relatedness group 2 was phenotypically indistinguishable from DNA relatedness group 3. On the basis of these studies, we propose that M. morganii be subdivided into M. morganii subsp. morganii (type strain ATCC 25830) containing biogroups A, B, C, and D (DNA relatedness group 1) and M. morganii subsp. sibonii (type strain 8103-85; =ATCC 49948) containing biogroups E, F, and G (DNA relatedness groups 2 and 3).

This article has been cited by other articles:

				J. Emborg, P. Dalgaard, and P. Ahrens Morganella psychrotolerans sp. nov., a histamine-producing bacterium isolated from various seafoods. Int J Syst Evol Microbiol, October 1, 2006; 56(Pt 10): 2473 - 2479. [Abstract] [Full Text] [PDF]

				C. M. O'Hara, F. W. Brenner, and J. M. Miller Classification, Identification, and Clinical Significance of Proteus, Providencia, and Morganella Clin. Microbiol. Rev., October 1, 2000; 13(4): 534 - 546. [Abstract] [Full Text] [PDF]