Numerical Study of 60 Strains of Serratia

Grimont, P. A. D.; Rosnay, H. L. C. Dulong De

doi:10.1099/00221287-72-2-259

Cited by 23 publications

(16 citation statements)

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“…Transfer of resistance to E. coli has also been reported from strains of S. marcescens isolated in France (Grimont & Dulong de Rosnay, 1972;Scavizzi, 1972;Lemosquet-Villemon, Morel & Freymuth, 1973).…”

Section: Introductionmentioning

confidence: 85%

R Factors from Serratia Marcescens

Hedges

Rodríguez–Lemoine

Datta

1975

Journal of General Microbiology

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S U M M A R YR factors transmissible to Escherichia coli from naturally occurring strains of Serratia marcescens belonged either to compatibility groups ( S and L) not represented amongst plasmids reported in other genera or to groups (C, FII, P and M) notable for their wide host range. We have collected strains of S. marcescens, most, but not all, clinical isolates, from widely separate geographical areas; each strain was tested for antibiotic resistance and for R factors transmissible to E. coli K 1 2 . The R factors were classified by compatibility in K 1 2 (Datta, 1974). Our purpose was to find out how much of the antibiotic resistance observed in M E T H O D SSerratia marcescens. The sources of the 236 strains of S. marcescens studied are shown in Antibiotic resistance patterns were scored using a disc method (Hedges, 1974). Transfer of resistance to Escherichia coli ~1 2 .A rifampicin-resistant mutant of E. coli ~1 2 , 562-2 (Hedges, 1974) was used as recipient in tests for transfer. Methods were as described by Coetzee et al. (1972).

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Section: Introductionmentioning

confidence: 85%

R Factors from Serratia Marcescens

Hedges

Rodríguez–Lemoine

Datta

1975

Journal of General Microbiology

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“…The 8th edition of Bergey's Manual of Determinative Bacteriology (23), following earlier work (10,11,20), recognizes only one species, Serratia marcescens. However, since 1959 several workers (1,12,14) have challenged the concept of a monospecific genus Serratia. The second species to be formally recognized was S. Ziquefaciens (Grimes and Hennerty 1931) Bascomb et al 1971 (1,13).…”

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“…The second species to be formally recognized was S. Ziquefaciens (Grimes and Hennerty 1931) Bascomb et al 1971 (1,13). A third species, S. rubidaea (Stapp 1940) Ewing et al 1973, was proposed and corresponds to Serratia biotype 2 of Bascomb et al (1) and to phenon B of Grimont and Dulong de Rosnay (14). The same taxon is also called S. marinorubra ZoBell and Upham 1944.…”

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Deoxyribonucleic Acid Relatedness Between Serratia plymuthica and Other Serratia Species, with a Description of Serratia odorifera sp. nov. (Type Strain: ICPB 3995)

Grimont

Richard

et al. 1978

International Journal of Systematic Bacteriology

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Seven new isolates of Serratiaplymuthica (including two from a human source) and 24 isolates resembling unclustered Serratia strain 38 (Grimont et al., J. Gen. Microbiol98:39-66, 1977) are described. Deoxyribonucleic acid relatedness studies, obtained with labeled reference deoxyribonucleic acid from s. plymuthica 392 confirm that S. plymuthica is a discrete species. Mean percent relatedness of S. plymuthica isolates to strain 392 was 88 f 13.6 (standard deviation), whereas the mean percent relatedness of S. Ziquefaciens isolates (the closest species) to strain 392 was 52 f 12.4. Strain 38 and twenty-four "38-like" isolates constitute a new deoxyribonucleic acid hybridization group that is 28 to 43% related to Serratia species and to the "Citrobacter-like" group of Leclerc and Buttiaux, and 15 to 22% related to other known species of Enterobacteriaceae. This 38-like group constitutes a new species that is named Serratia odorifera sp. nov. (type strain, ICPB 3995). Two biotypes (1 and 2) are described. Strains of this species will grow on caprylate-thallous agar (selective for Serratia spp.), and they have a characteristic odor. Most strains of S. odorifera were recovered from clinical specimens.

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“…Several papers have been published in which the authors examined a wide range of bacteria, among which were included some of the enteric organisms (22,26,65). In addition, individual groups of this family have been selected for study, notably Serratia (12,27), Erwinia (49), Salmonella (48), the tribe is, the Enterobacteriaceae appeared to be made up of a continuous spectrum of bacteria showing little evidence of generic or specific subgroupings.…”

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Numerical Taxonomy Study of the Enterobacteriaceae

Johnson

Colwell

Sakazaki

et al. 1975

International Journal of Systematic Bacteriology

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Three hundred and eighty-four strains of bacteria representing the genera of the Enterobacteriaceae were examined over a wide range of biochemical, physiological, and morphological characters. The data were subjected to numerical analysis, and the resulting 33 clusters were equated as far as possible with established taxa within the Enterobacteriaceae. The clusters formed three groups. Group A corresponded to the tribe Klebsielleae and consisted of the genera Enterobacter, Klebsiella, and Serratia. The data suggest that Enterobacter and Klebsiella could be combined into a single genus, whereas Hafnia alvei should be retained in a genus separate from Enterobacter. Group B comprised the tribes Edwardsielleae, Salmonelleae, and Escherichieae. Strains of Edwardsiella species fell into two clusters, suggestive of possible biotype differences or perhaps two separate species, Many of Kauffmann's biochemical subgroup 1 salmonellae could be combined into a single species, which on grounds of priority should be designated Salmonella enteritidis (Gaertner) Castellani and Chalmers. However, there are other subgroup 1 serotypes which clearly do not belong in this species. Further study is suggested. Three species of Shigella, i.e., S. boydii. S. flexneri, and S. dysenteriae, were not separated by the analyses performed in this study. Either the three species cannot be identified on the basis of the biochemical characters employed or their identification requires considerable modification. Also included in group B were members of the genus Yersinia. Group C, representing the tribe Proteae, requires considerable revision, if a classification reflecting both molecular genetic and phenetic taxonomic relationships is to be attained.With the application of computers to the analysis of data recorded in taxonomic studies, microbial classification has, in the last 15 years, received increased attention and interest. Papers published on the application of numerical techniques to bacterial taxonomy now run into many hundreds (ll), and the majority of these have enabled considerable progress to be made in this field.One area in which the application of numerical taxonomic techniques has been lacking is in examining relationships among members of the Enterobacteriaceae. Several papers have been published in which the authors examined a wide range of bacteria, among which were included some of the enteric organisms (22,26,65). In addition, individual groups of this family have been selected for study, notably Serratia (12, 27), Erwinia (49), Salmonella (48), the tribe is, the Enterobacteriaceae appeared to be made up of a continuous spectrum of bacteria showing little evidence of generic or specific subgroupings.A larger study (4) including mainly members of the tribe Klebsielleae and reference strains of other enteric genera did show evidence of generic subgroupings. However, this study remains open to criticism because of the small number of characters recorded for each strain.One of us (R. S.) accumulated a large amount of data on the ...

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Numerical Study of 60 Strains of Serratia

Cited by 23 publications

References 13 publications

R Factors from Serratia Marcescens

R Factors from Serratia Marcescens

Deoxyribonucleic Acid Relatedness Between Serratia plymuthica and Other Serratia Species, with a Description of Serratia odorifera sp. nov. (Type Strain: ICPB 3995)

Numerical Taxonomy Study of the Enterobacteriaceae

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