The Genera Chryseobacterium and Elizabethkingia
- PDF / 570,809 Bytes
- 39 Pages / 539 x 751 pts Page_size
- 77 Downloads / 192 Views
CHAPTER 6.12 ehT
areneG
mu i re t caboesyrhC
dna
a i gn i kht ebaz i lE
The Genera Chryseobacterium and Elizabethkingia JEAN-FRANÇOIS BERNARDET, CELIA HUGO AND BRITA BRUUN
Introduction Together with the genera Bergeyella and Empedobacter, the genus Chryseobacterium Vandamme, Bernardet, Segers, Kersters, and Holmes 1994 was built on the ruins of the genus Flavobacterium, shortly before the latter was thoroughly emended following extensive phylogenetic investigations (Vandamme et al., 1994; Bernardet et al., 1996; see also the following chapters in this edition: The Genus Flavobacterium in this Volume, The Genera Empedobacter and Myroides in this Volume, and The Genera Bergeyella and Weeksella in this Volume). For reasons that are explained in the section Phylogeny, the splitting of the genus Chryseobacterium was proposed very recently (Kim et al., 2005b); the organismpreviously known as Chryseobacterium meningosepticum and C. miricola were allocated to the new genus Elizabethkingia under the epithets Elizabethkingia meningoseptica and E. miricola. Among the currently recognized Chryseobacterium and Elizabethkingia species, those that were already described in the previous editions of Bergey’s Manual of Systematic Bacteriology and The Prokaryotes were dealt with in the chapters Genus Flavobacterium Harrison, Breed, Hammer and Huntoon 1923 (Holmes et al., 1984) and The Genera Flavobacterium, Sphingobacterium, and Weeksella (The Prokaryotes, second edition and in this Volume), respectively. The genera Chryseobacterium and Elizabethkingia belong to the family Flavobacteriaceae, the history and structure of which are presented in another chapter in this Volume: An Introduction to the Family Flavobacteriaceae. Currently, Flavobacteriaceae comprise 25 other valid genera; following extensive bacteriological surveys of various, mostly marine and polar environments, several additional genera are about to be published in the International Journal of Systematic and Evolutionary Microbiology. Taxonomic and nomenclatural issues concerning the family are dealt with by the Subcommittee on the taxonomy of Flavobacterium and Cytophaga-like bacteria of the International Committee on Systematics of Prokaryotes. This subcommittee has
issued minimal standards for the description of new taxa in the family Flavobacteriaceae (Bernardet et al., 2002). Many Chryseobacterium and Elizabethkingia strains occur in soil, freshwater, and marine environments, while others are found in dairy products; others are opportunistic pathogens of humans and animals. Most of the environmental species have not been extensively studied and some of them are only represented in culture collections by one or very few strains. Conversely, the clinical and dairy isolates have received more attention owing to their medical or economic significance, and collections comprising a reasonable number of strains are available.
Phylogeny The 16S rRNA gene sequences of at least the type strains of all valid Chryseobacterium and Elizabethkingia species are now available,
Data Loading...
