{"doi":"10.1099/ijsem.0.005050","title":"Treponema peruense sp. nov., a commensal spirochaete isolated from human faeces","abstract":"A Gram-stain-negative, obligatory anaerobic spirochaete (RCC2812 T ) was isolated from a faecal sample obtained from an individual residing in a remote Amazonian community in Peru. The bacterium showed highest 16S rRNA gene sequence similarity to the pig intestinal spirochete Treponema succinifaciens (89.48 %). Average nucleotide identity values between strain RCC2812 T and all available Treponema genomes from validated type strains were all <73 %, thus clearly lower than the species delineation threshold. The DNA G+C content of RCC2812 T was 41.24 mol%. Phenotypic characterization using the API-ZYM and API 20A systems confirmed the divergent position of this bacterium within the genus Treponema . Strain RCC2812 T could be differentiated from the phylogenetically most closely related T. succinifaciens by the presence of alkaline phosphatase and α -glucosidase activities. Unlike T. succinifaciens , strain RCC2812 T grew equally well with or without serum. Strain RCC2812 T is the first commensal Treponema isolated from the human faecal microbiota of remote populations, and based on the collected data represents a novel Treponema species for which the name Treponema peruense sp. nov. is proposed. The type strain is RCC2812 T (=LMG 31794 T =CIP 111910 T ).","journal":"INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY","year":2021,"id":198661,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":10,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9371,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2021-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":744487,"name":"Raúl Y. Tito","orcid":"0000-0001-9660-7621","position":1,"is_corresponding":false},{"id":94936,"name":"Rodrigo Bacigalupe","orcid":"0000-0001-7310-997X","position":2,"is_corresponding":false},{"id":267474,"name":"Mireia Valles‐Colomer","orcid":"0000-0002-1988-6054","position":3,"is_corresponding":false},{"id":773950,"name":"Samuel Chaffron","orcid":"0000-0001-5903-617X","position":4,"is_corresponding":false},{"id":773951,"name":"Marie Joossens","orcid":"0000-0001-8410-5528","position":5,"is_corresponding":false},{"id":744488,"name":"Alexandra J. Obregón-Tito","orcid":"0000-0003-2508-7176","position":6,"is_corresponding":false},{"id":745309,"name":"Luis Marín Reyes","orcid":null,"position":7,"is_corresponding":false},{"id":773952,"name":"Omar Trujillo","orcid":"0000-0002-1431-0427","position":8,"is_corresponding":false},{"id":773953,"name":"Geert Huys","orcid":"0000-0002-7092-4837","position":9,"is_corresponding":false},{"id":16741,"name":"Jeroen Raes","orcid":"0000-0002-1337-041X","position":10,"is_corresponding":false},{"id":773949,"name":"Claire Belkhou","orcid":"0000-0002-7567-526X","position":0,"is_corresponding":true}],"reference_count":34,"raw_metadata":null,"created_at":"2026-07-18T23:50:31.857233Z","pmid":"34672919","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}