scholarly journals Isolation and Description of Catonella massiliensis sp. nov., a Novel Catonella Species, Isolated from a Stable Periodontitis Subject

Pathogens ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 367
Author(s):  
Angéline Antezack ◽  
Manon Boxberger ◽  
Bernard La Scola ◽  
Virginie Monnet-Corti
Keyword(s):  
Fatty Acid ◽  
16S Rrna ◽  
Novel Species ◽  
Saliva Sample ◽  
Acid Methyl Ester ◽  
Growth Conditions ◽  
Cellular Fatty Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
16S Rrna Sequence ◽  
Fame Analysis

The genus Catonella currently counts a unique species, C. morbi, isolated from periodontal pockets and associated with periodontitis and endodontic infections. This study contributed to the taxonomical and clinical knowledge of this genus by describing a novel species isolated from a saliva sample from a man in clinical gingival health following successful treatment of periodontitis. Morphological and chemotaxonomic characteristics were investigated using different growth conditions, pH, and temperature. Cellular fatty acid methyl ester (FAME) analysis was conducted by gas chromatography/mass spectrometry (GC/MS). Phylogenetic analysis based on 16S rRNA, orthologous average nucleotide identity (OrthoANI), and digital DNA-DNA hybridization (dDDH) relatedness were performed. Strain Marseille-Q4567T was found to be an anaerobic and non-spore-forming rod-shaped bacterium that grew at 28–41.5 °C (optimum 37 °C), pH 6.5–8.5 (optimum pH 7.5), and 5–10 g/L of NaCl (optimum 5 g/L). The predominant cellular fatty acid was C16:0 (64.2%), followed by unsaturated structures C18:1n9 (12.5%) and C18:2n6 (7.8%). Based on 16S rRNA sequence comparison, the closest phylogenetic neighbor was C. morbi ATCC 51271T (98.23% similarity). The OrthoANI and dDDH values between strain Q4567T and C. morbi ATCC 51271T were respectively 79.43% and 23.8%. Therefore, we concluded that strain Marseille-Q4567T represents a novel species of the genus Catonella, for which the name Catonella massiliensis sp. nov. is proposed (= CSUR Q4567).

scholarly journals Isolation and Characterization of Capnocytophaga bilenii sp. nov., a Novel Capnocytophaga Species Detected in a Gingivitis Subject

Pathogens ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 547
Author(s):  
Angéline Antezack ◽  
Manon Boxberger ◽  
Bernard La Scola ◽  
Virginie Monnet-Corti
Keyword(s):  
Fatty Acid ◽  
Inflammatory Diseases ◽  
Novel Species ◽  
Acid Methyl Ester ◽  
Cellular Fatty Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
Oral Microbiota ◽  
Hexadecanoic Acid ◽  
Tetradecanoic Acid ◽  
Isolation And Characterization

Capnocytophaga species are commensal gliding bacteria that are found in human and animal oral microbiota and are involved in several inflammatory diseases, both in immunocompromised and immunocompetent subjects. This study contributes to increased knowledge of this genus by characterizing a novel species isolated from a dental plaque sample in a male with gingivitis. We investigated morphological and chemotaxonomic characteristics using different growth conditions, temperature, and pH. Cellular fatty acid methyl ester (FAME) analysis was employed with gas chromatography/mass spectrometry (GC/MS). Phylogenetic analysis based on 16S rRNA, orthologous average nucleotide identity (OrthoANI), and digital DNA–DNA hybridization (dDDH) relatedness were performed. The Marseille-Q4570T strain was found to be a facultative aerobic, Gram-negative, elongated, round-tipped bacterium that grew at 25–56 °C and tolerated a pH of 5.5 to 8.5 and an NaCl content ranging from 5 to 15 g/L. The most abundant fatty acid was the branched structure 13-methyl-tetradecanoic acid (76%), followed by hexadecanoic acid (6%) and 3-hydroxy-15-methyl-hexadecanoic acid (4%). A 16S rDNA-based similarity analysis showed that the Marseille-Q4570T strain was closely related to Capnocytophaga leadbetteri strain AHN8855T (97.24% sequence identity). The OrthoANI and dDDH values between these two strains were, respectively, 76.81% and 25.6%. Therefore, we conclude that the Marseille-Q4570T strain represents a novel species of the genus Capnocytophaga, for which the name Capnocytophaga bilenii sp. nov. is proposed (=CSUR Q4570).

scholarly journals Isolation and Characterization of Kingella bonacorsii sp. nov., A Novel Kingella Species Detected in a Stable Periodontitis Subject

Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 240
Author(s):  
Angéline Antezack ◽  
Manon Boxberger ◽  
Clara Rolland ◽  
Virginie Monnet-Corti ◽  
Bernard La Scola
Keyword(s):  
16S Rrna ◽  
Novel Species ◽  
Sequence Similarity ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Cellular Fatty Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
Rrna Gene ◽  
Hexadecenoic Acid ◽  
Isolation And Characterization

Members of the genus Kingella are mostly commensals of the oral cavity, but some of them are involved in invasive infections, especially in young children. This study provides new knowledge on the diversity of this genus by describing a novel species of Kingella isolated from a dental plaque sample from a 51-year-old man with a history of periodontitis. Morphological and chemotaxonomic characteristic were investigated using different growth conditions, pH and temperature. Cellular fatty acid methyl ester (FAME) analysis was performed by gas chromatography/mass spectrometry (GC/MS). Phylogenetic analysis based on 16S rRNA, orthologous average nucleotide identity (OrthoANI) and digital DNA–DNA hybridization (dDDH) relatedness were also performed. Strain Marseille-Q4569T was found to be a facultative aerobic, nonmotile and non-spore-forming rod-shaped bacterium that grows at 28–41.5 °C (optimum 37 °C), pH 5.5–8.5 (optimum pH 7.5) and 5–15 g/L of NaCl. The major fatty acids were Hexadecanoic acid (32.7%), 11-Octadecenoic acid (26.1 %) and 9-Hexadecenoic acid (21.3 %). Despite high 16S rRNA gene sequence similarity (98.72%) between strain Marseille-Q4569T and Kingella oralis strain UB-38T, the degree of OrthoANI was at the limit of the cutoff (95.83%), and the degree of dDDH was lower (63.6%) than thresholds used to delineate prokaryotic species. Therefore, it is proposed that strain Marseille-Q4569T represents a novel species of the genus Kingella, for which the name Kingella bonacorsii sp. nov. is proposed (=CSUR Q4569).

scholarly journals Acidisoma silvae sp. nov. and Acidisomacellulosilytica sp. nov., Two Acidophilic Bacteria Isolated from Decaying Wood, Hydrolyzing Cellulose and Producing Poly-3-hydroxybutyrate

2021 ◽  
Vol 9 (10) ◽  
pp. 2053
Author(s):  
Sophie Mieszkin ◽  
Eva Pouder ◽  
Stéphane Uroz ◽  
Christelle Simon-Colin ◽  
Karine Alain
Keyword(s):  
Fatty Acid ◽  
16S Rrna ◽  
Sequence Similarity ◽  
Cellular Fatty Acid ◽  
Pha Synthase ◽  
Rrna Gene ◽  
Cyclopropane Fatty Acid ◽  
16S Rrna Sequence ◽  
Wide Range ◽  
Decaying Wood

Two novel strains, HW T2.11T and HW T5.17T, were isolated from decaying wood (forest of Champenoux, France). Study of the 16S rRNA sequence similarity indicated that the novel strains belong to the genus Acidisoma. The sequence similarity of the 16S rRNA gene of HW T2.11T with the corresponding sequences of A. tundrae and A. sibiricum was 97.30% and 97.25%, while for HW T5.17T it was 96.85% and 97.14%, respectively. The DNA G+C contents of the strains were 62.32–62.50%. Cells were Gram-negative coccobacilli that had intracellular storage granules (poly-3-hydroxybutyrate (P3HB)) that confer resistance to environmental stress conditions. They were mesophilic and acidophilic organisms growing at 8–25 °C, at a pH of 2.0–6.5, and were capable of using a wide range of organic compounds and complex biopolymers such as starch, fucoidan, laminarin, pectin and cellulose, the latter two being involved in wood composition. The major cellular fatty acid was cyclo C19:0ω8c and the major quinone was Q-10. Overall, genome relatedness indices between genomes of strains HW T2.11T and HW T5.17T (Orthologous Average Nucleotide Identity (OrthoANI) value = 83.73% and digital DNA-DNA hybridization score = 27.5%) confirmed that they belonged to two different species. Genetic predictions indicate that the cyclopropane fatty acid (CFA) pathway is present, conferring acid-resistance properties to the cells. The two novel strains might possess a class IV polyhydroxyalcanoate (PHA) synthase operon involved in the P3HB production pathway. Overall, the polyphasic taxonomic analysis shows that these two novel strains are adapted to harsh environments such as decaying wood where the organic matter is difficult to access, and can contribute to the degradation of dead wood. These strains represent novel species of the genus Acidisoma, for which the names Acidisoma silvae sp. nov. and Acidisomacellulosilytica sp. nov. are proposed. The type strains of Acidisoma silvae and Acidisomacellulosilytica are, respectively, HW T2.11T (DSM 111006T; UBOCC-M-3364T) and HW T5.17T (DSM 111007T; UBOCC-M-3365T).

scholarly journals Identification of Three Strains of Mycobacterium Species Isolated from Clinical Samples Using Fatty Acid Methyl Ester Profiling

2003 ◽  
Vol 31 (2) ◽  
pp. 133-140 ◽  
Author(s):  
A Ozbek ◽  
O Aktas
Keyword(s):  
Fatty Acid ◽  
Methyl Esters ◽  
Acid Methyl Ester ◽  
Cellular Fatty Acid ◽  
Clinical Samples ◽  
Identification System ◽  
Cyclopropane Fatty Acid ◽  
Mycobacterium Species ◽  
Microbial Identification ◽  
Acid Methyl

The cellular fatty acid profiles of 67 strains belonging to three different species of the genus Mycobacterium were determined by gas chromatography of the fatty acid methyl esters, using the MIDI Sherlock® Microbial Identification System (MIS). The species M. tuberculosis, M. xenopi and M. avium complex were clearly distinguishable and could be identified based on the presence and concentrations of 12 fatty acids: 14:0, 15:0, 16:1ω7c, 16:1ω6c, 16:0, 17:0, 18:2ω6,9c, 18:1ω9c, 18:0, 10Me-18:0 tuberculostearic acid, alcohol and cyclopropane. Fatty acid analysis showed that there is great homogeneity within and heterogeneity between Mycobacterium species. Thus the MIS is an accurate, efficient and relatively rapid method for the identification of mycobacteria.

Differentiation between Candida dubliniensis andCandida albicans by Fatty Acid Methyl Ester Analysis Using Gas-Liquid Chromatography

2000 ◽  
Vol 38 (10) ◽  
pp. 3696-3704 ◽  
Author(s):  
Heidrun Peltroche-Llacsahuanga ◽  
Silke Schmidt ◽  
Michael Seibold ◽  
Rudolf Lütticken ◽  
Gerhard Haase
Keyword(s):  
Liquid Chromatography ◽  
Fatty Acid ◽  
Methyl Ester ◽  
Fatty Acid Methyl Ester ◽  
Acid Methyl Ester ◽  
Candida Dubliniensis ◽  
Identification System ◽  
Gas Liquid Chromatography ◽  
Fame Analysis ◽  
Acid Methyl

Candida dubliniensis is often found in mixed culture with C. albicans, but its recognition is hampered as the color of its colonies in primary culture on CHROMagar Candida varies. Furthermore, definite identification of C. dubliniensis is difficult to achieve, time-consuming, and expensive. Therefore, a method to discriminate between these two closely related yeast species by fatty acid methyl ester (FAME) analysis using gas-liquid chromatography (Sherlock Microbial Identification System [MIS]; MIDI, Inc., Newark, Del.) was developed. Although the chromatograms of these two species revealed no obvious differences when applying FAME analysis, a new library (CADLIB) was successfully created using Sherlock Library Generation Software (MIDI). The amount and frequency of FAME was analyzed using library training files (n = 10 for each species), preferentially those comprising reference strains. For testing the performance of the CADLIB, clinical isolates genetically assigned to the respective species (C. albicans, n = 32; C. dubliniensis, n = 28) were chromatographically analyzed. For each isolate tested, MIS computed a similarity index (SI) indicating a hierarchy of possible strain fits. When using the newly created library CADLIB, the SIs for C. albicans andC. dubliniensis ranged from 0.11 to 0.96 and 0.53 to 0.93 (for all but one), respectively. Only three isolates of C. albicans (9.4%) were misidentified as C. dubliniensis, whereas all isolates of C. dubliniensiswere correctly identified. Resulting differentiation accuracy was 90.6% for C. albicans and 100% for C. dubliniensis. Cluster analysis and principal component analysis of the resulting FAME profiles showed two clearly distinguishable clusters matching up with two assigned species for the strains tested. Thus, the created library proved to be well suited to discriminate between these two species.

Brevibacillus nitrificans sp. nov., a nitrifying bacterium isolated from a microbiological agent for enhancing microbial digestion in sewage treatment tanks

2012 ◽  
Vol 62 (Pt_9) ◽  
pp. 2121-2126 ◽  
Author(s):  
Fumihiko Takebe ◽  
Kikue Hirota ◽  
Yoshinobu Nodasaka ◽  
Isao Yumoto
Keyword(s):  
16S Rrna ◽  
Type Species ◽  
Sewage Treatment ◽  
Cellular Fatty Acid ◽  
Rrna Gene ◽  
16S Rrna Sequence ◽  
Content Type ◽  
Link Type ◽  
Brevibacillus Choshinensis ◽  
Type Strains

A heterotrophic nitrifying bacterium, designated strain DA2T, was isolated from a microbiological agent for enhancing microbial digestion in sewage treatment tanks. Cells of strain DA2T were Gram-positive, facultatively anaerobic, sporulating rods that were motile by means of peritrichous flagella; they were able to grow at pH 5–8. The major isoprenoid quinone of strain DA2T was menaquinone-7 (MK-7) and its cellular fatty acid profile consisted mainly of iso-C15 : 0 (18.6 %) and anteiso-C15 : 0 (69.1 %). The DNA G+C content was 54.1 mol%. 16S rRNA gene sequence phylogeny suggested that strain DA2T is a member of the genus Brevibacillus , with highest sequence similarities (in parentheses) to the type strains of Brevibacillus choshinensis (99.7 %), B. formosus (99.4 %), B. brevis (99.4 %), B. agri (99.0 %), B. reuszeri (98.8 %), B. parabrevis (98.7 %), B. centrosporus (98.6 %), B. limnophilus (97.4 %), B. panacihumi (97.3 %) and B. invocatus (97.3 %). DNA–DNA hybridization showed less than 60 % relatedness between strain DA2T and type strains of the most closely related species given above. Given the significant differences in phenotypic and chemotaxonomic characteristics, and phylogenetic analysis based on the 16S rRNA sequence and DNA–DNA relatedness data, the isolate merits classification as a novel species, for which the name Brevibacillus nitrificans is proposed; the type strain of this species is DA2T ( = JCM 15774T = NCIMB 14531T).

scholarly journals In vitro anthelmintic and cytotoxic activities of extracts of Persea willdenovii Kosterm (Lauraceae)

2017 ◽  
Vol 92 (6) ◽  
pp. 674-680
Author(s):  
S.S. Santa Rosa ◽  
F.O. Santos ◽  
H.G. Lima ◽  
I.M.A. Reis ◽  
D.S.A. Cassiano ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Acid Methyl Ester ◽  
Gastrointestinal Nematodes ◽  
Ethyl Esters ◽  
Gas Chromatography Mass Spectrometry ◽  
Cytotoxic Activities ◽  
Dependent Manner ◽  
Egg Hatching ◽  
Trypan Blue Exclusion

AbstractThis study describes the effects of extracts and fractions of Persea willdenovii leaves against goat gastrointestinal nematodes and their cytotoxicity on Vero cells. The in vitro ovicidal and larvicidal activities of the crude ethanolic, hexane, ethyl acetate (EAE), butanolic and residual hydroethanolic extracts were assessed through the inhibition of egg hatching and larval motility assays. The most active extract (EAE) was then fractionated by chromatography in an open column containing silica gel, to furnish six fractions (Fr1–Fr6), which were also tested. The cytotoxicity of active extracts and fractions was determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and trypan blue exclusion assay. The EAE and two fractions (Fr1 and Fr2) showed inhibitory activity in the egg hatching of gastrointestinal nematodes of goats in a concentration-dependent manner. The effective concentrations for 50% inhibition (EC50) of egg hatching were 2.3, 0.12 and 2.94 mg/ml for EAE, Fr1 and Fr2, respectively. All extracts and fractions were not effective in inhibiting 50% of motility of infective larvae. EAE and Fr2 had IC50 values (50% inhibitory concentration) of 4.95 and 2.66 mg/ml, respectively. Fr1 showed a slight cytotoxic effect (cellular inviability <30%) only after 48 h of treatment (MTT test). Gas chromatography–mass spectrometry (GC–MS) analysis showed the presence of six fatty acid ethyl esters, a fatty acid methyl ester and a long-chain ketone in the most active fraction. These constituents identified in P. willdenovii can be related to the high ovicidal activity and relatively non-toxic effect of the extracts.

scholarly journals Bacillus acidiceler sp. nov., isolated from a forensic specimen, containing Bacillus anthracis pX02 genes

2007 ◽  
Vol 57 (9) ◽  
pp. 2031-2036 ◽  
Author(s):  
K. Kealy Peak ◽  
Kathleen E. Duncan ◽  
William Veguilla ◽  
Vicki A. Luna ◽  
Debra S. King ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Methyl Ester ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Fatty Acid Methyl Ester ◽  
Gene Sequence ◽  
Acid Methyl Ester ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Acid Methyl

Research at the Center for Biological Defense identified plasmid-borne forms of Bacillus anthracis pXO2 genes in a Gram-positive, endospore-forming rod, isolated from a forensic specimen considered a credible threat of harbouring anthrax. Conventional, commercial and molecular-based methods indicated that the isolate (CBD 119T) was not B. anthracis and considered not to be a member of the Bacillus cereus group. Based on the 16S rRNA gene sequence similarities, strain CBD 119T was most closely related to Bacillus luciferensis LMG 18422T (99.3 %). Phenotyping and fatty acid methyl ester analysis of the isolate were conducted alongside B. luciferensis JCM 12212T. The major cellular fatty acids (anteiso-C15 : 0, iso-C15 : 0, and >7 iso or anteiso forms) supported inclusion of the isolate in the genus Bacillus. Strain CBD 119T was inconsistent with B. luciferensis JCM 12212T for 18 of 96 traits evaluated including motility, degree of endospore-driven swelling and pH optimum; the two were linked by fatty acid methyl ester analysis as separate but closely related species. DNA–DNA relatedness between strain CBD 119T and B. luciferensis JCM 12212T resulted in less than 20 % hybridization. The results of biochemical and physiological characterization, chemotaxonomic analysis and DNA–DNA hybridization differentiated strain CBD 119T both phenotypically and genotypically from the only species with validly published name with greater than 97 % 16S rRNA gene sequence similarity. The isolate has an accelerated doubling time when grown in aerated broth at pH 5.9 relative to that at pH 7.1. Therefore, it is proposed that strain CBD 119T represents a novel species, Bacillus acidiceler sp. nov. The type strain is strain CBD 119T (=NRRL B-41736T=DSM 18954T).

scholarly journals Isolation and Characterization of Burkholderia rinojensis sp. nov., a Non-Burkholderia cepacia Complex Soil Bacterium with Insecticidal and Miticidal Activities

2013 ◽  
Vol 79 (24) ◽  
pp. 7669-7678 ◽  
Author(s):  
Ana Lucia Cordova-Kreylos ◽  
Lorena E. Fernandez ◽  
Marja Koivunen ◽  
April Yang ◽  
Lina Flor-Weiler ◽  
...  
Keyword(s):  
16S Rrna ◽  
Dna Hybridization ◽  
Larval Mortality ◽  
Leaf Disc ◽  
Acid Methyl Ester ◽  
Burkholderia Cenocepacia ◽  
Burkholderia Cepacia Complex ◽  
Content Type ◽  
Fame Analysis ◽  
Isolation And Characterization

ABSTRACTIsolate A396, a bacterium isolated from a Japanese soil sample demonstrated strong insecticidal and miticidal activities in laboratory bioassays. The isolate was characterized through biochemical methods, fatty acid methyl ester (FAME) analysis, sequencing of 16S rRNA, multilocus sequence typing and analysis, and DNA-DNA hybridization. FAME analysis matched A396 toBurkholderia cenocepacia, but this result was not confirmed by 16S rRNA or DNA-DNA hybridization. 16S rRNA sequencing indicated closest matches withB. glumaeandB. plantarii. DNA-DNA hybridization experiments withB. plantarii,B. glumae,B. multivorans, andB. cenocepaciaconfirmed the low genetic similarity (11.5 to 37.4%) with known members of the genus. PCR-based screening showed that A396 lacks markers associated with members of theB. cepaciacomplex. Bioassay results indicated two mechanisms of action: through ingestion and contact. The isolate effectively controlled beet armyworms (Spodoptera exigua; BAW) and two-spotted spider mites (Tetranychus urticae; TSSM). In diet overlay bioassays with BAW, 1% to 4% (vol/vol) dilution of the whole-cell broth caused 97% to 100% mortality 4 days postexposure, and leaf disc treatment bioassays attained 75% ± 22% mortality 3 days postexposure. Contact bioassays led to 50% larval mortality, as well as discoloration, stunting, and failure to molt. TSSM mortality reached 93% in treated leaf discs. Activity was maintained in cell-free supernatants and after heat treatment (60°C for 2 h), indicating that a secondary metabolite or excreted thermostable enzyme might be responsible for the activity. Based on these results, we describe the novel speciesBurkholderia rinojensis, a good candidate for the development of a biocontrol product against insect and mite pests.

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