Fastidiosipila

Abstract Fas.ti.di.o.si.pi'la. L. adj. fastidiosus fastidious; L. fem n. pila ball; N.L. fem. n. fastidiosipila a fastidious ball, because the organisms are difficult to grow. Cells are cocci (approx. 0.5 µm diameter) that stain Gram‐stain‐positive and do not form spores. Anaerobic but can grow in the presence of 2 % and 6 % O 2 . Catalase‐negative . Carbohydrates are not fermented . Small amounts of acetic and butyric acids are detected in Fastidious Anaerobe Broth with meat granules. Lecithinase ‐, lipase ‐, and urease‐negative . Non‐cellulolytic . Cells are indole‐negative and do not reduce nitrate to nitrite. Based on 16S rRNA gene sequence and phylogenetic analyses, this genus is loosely associated with Clostridium rRNA cluster III of the Firmicutes . Isolated from human blood. DNA G + C content ( mol %): 32.9. Type species : Fastidiosipila sanguinis Falsen, Collins, Welinder‐Olsson, Song, Finegold and Lawson 2005, 856 VP . Taxonomic and Nomenclature Notes According to the List of Prokaryotic names with Standing in Nomenclature (LPSN), the taxonomic status of the genus Fastidiosipila is: correct name (last update, February 2025) * . LPSN classification: Bacteria / Bacillati / Bacillota / Clostridia / Eubacteriales / Oscillospiraceae / Fastidiosipila The genus Fastidiosipila can also be recovered in the Genome Taxonomy Database (GTDB) as g__Fastidiosipila (version v220) ** . GTDB classification: d__Bacteria / p__Bacillota_A / c__Clostridia / o__Saccharofermentanales / f__Fastidiosipilaceae / g__Fastidiosipila * Meier‐Kolthoff et al. ( 2022 ). Nucleic Acids Res , 50 , D801 – D807 ; DOI: 10.1093/nar/gkab902 ** Parks et al. ( 2022 ). Nucleic Acids Res , 50 , D785 – D794 ; DOI: 10.1093/nar/gkab776