title: Mycobacterium icosiumassiliensis sp. nov., a New Member in the Mycobacterium terrae Complex Isolated from Surface Water in Algeria.
abstract: An acid-fast, rapidly growing, rod-shaped microorganism designated 8WA6 was isolated from a lake in Algiers, Algeria. The lake water was characterized by a temperature of 18 °C, a pH of 7.82, a copper concentration of 8.6 µg/L, and a cadmium concentration of 0.6 µg/L. First-line molecular identification confirmed the 8WA6 isolate to be a member of the Mycobacterium terrae complex, sharing 99.4 % 16S rRNA gene sequence similarity with M. arupense AR-30097, 98.2 % partial hsp65 gene sequence similarity with M. terrae 28K766, and 97.1 % partial rpoB gene sequence similarity with Mycobacterium sp. FI-05396. Its 4.89-Mb genome exhibits a 66.8 GC % and an average nucleotide identity of 64.5 % with M. tuberculosis, 70.5 % with M. arupense, and 75 % with M. asiaticum. In the M. terrae complex, Mycobacterium 8WA6 was unique in exhibiting growth at 42 °C, negative reaction for nitrate reduction, urease activity and Tween 80 hydrolysis, and a positive reaction for α-glucosidase and β-glucosidase. Its protein profile determined by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry revealed a unique spectrum similar to M. arupense and M. terrae, exhibiting eleven specific peaks at 3787.791, 4578.019, 6349.630, 6855.638, 7202.310, 8149.608, 8775.257, 10,224.588, 10,484.116, 12,226.379, and 12,636.871 m/z. Minimal inhibitory concentrations (MIC) for antibiotics, determined by microdilution, indicated a broad spectrum resistance, except for rifabutin (MIC, 0.5 g/L) and cefoxitin (MIC, 16 g/L). We concluded that the 8WA6 isolate is a representative isolate of a previously undescribed species in the M. terrae complex, which was named M. icosiumassiliensis sp. nov. with strain 8WA6 (Collection de Souches de l'Unité des Rickettsies, CSUR P1561, Deutsche Sammlung von Mikroorganismen und Zellkulturen, DSM 100711) as the type strain.
authors.affiliation: Laboratoire de Biologie Cellulaire et Moléculaire, Equipe de Microbiologie, Faculté des Sciences Biologiques, USTHB, BP n°32, Bab ezzouar, Alger, Algerie.
authors.forename: Lydia N
authors.initials: LN
authors.lastname: Djouadi
authors.affiliation: URMITE, Faculté de Médecine, UMR CNRS 7278, IRD 198, INSERM 1095, Aix Marseille Université, Marseille, 13005, France.
authors.forename: Anthony
authors.initials: A
authors.lastname: Levasseur
authors.affiliation: URMITE, Faculté de Médecine, UMR CNRS 7278, IRD 198, INSERM 1095, Aix Marseille Université, Marseille, 13005, France.
authors.forename: Jacques Bou
authors.initials: JB
authors.lastname: Khalil
authors.affiliation: URMITE, Faculté de Médecine, UMR CNRS 7278, IRD 198, INSERM 1095, Aix Marseille Université, Marseille, 13005, France.
authors.forename: Caroline
authors.initials: C
authors.lastname: Blanc-Taileur
authors.affiliation: URMITE, Faculté de Médecine, UMR CNRS 7278, IRD 198, INSERM 1095, Aix Marseille Université, Marseille, 13005, France.
authors.forename: Shady
authors.initials: S
authors.lastname: Asmar
authors.affiliation: Laboratoire de Physico-Chimie, Institut National de Criminalistique et de Criminologie (INCC), Alger, Algerie.
authors.forename: Wassila
authors.initials: W
authors.lastname: Ghiloubi
authors.affiliation: Laboratoire de Biologie Cellulaire et Moléculaire, Equipe de Microbiologie, Faculté des Sciences Biologiques, USTHB, BP n°32, Bab ezzouar, Alger, Algerie.
authors.forename: Farida
authors.initials: F
authors.lastname: Natèche
authors.affiliation: URMITE, Faculté de Médecine, UMR CNRS 7278, IRD 198, INSERM 1095, Aix Marseille Université, Marseille, 13005, France. michel.drancourt@univ-amu.fr.|Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes, Faculté de Médecine, Aix Marseille Université, 27, Boulevard Jean Moulin, 13385, Marseille Cedex 5, France. michel.drancourt@univ-amu.fr.
authors.forename: Michel
authors.initials: M
authors.lastname: Drancourt
mesh_terms: D000462:Algeria; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001426:Bacterial Proteins / Q000235:genetics; D004269:DNA, Bacterial / Q000235:genetics; D060106:Lakes / Q000737:chemistry / Q000382:microbiology*; D009161:Mycobacterium / Q000145:classification / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics
chemical_list: D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S