FN Archimer Export Format PT J TI Characterization of Actinomycetes Strains Isolated from Cheliff Estuary in the North-West of Algeria BT AF Meliani, Meriem F Denis, Françoise Mohamed-Benkada, Mustapha Gabed, Noujoud Caruso, Aurore CALLAC, Nolwenn Abi-Ayad, Sidi-Mohammed E.A. AS 1:1;2:2,3;3:4;4:5;5:3;6:6;7:1; FF 1:;2:;3:;4:;5:;6:PDG-RBE-LEADNC;7:; C1 Department of Biotechnology, Faculty of Nature and Life Sciences, University of Oran 1 Ahmed Ben Bella, B.P 1524, El M'Naouer -31000 Oran, Algeria IRD 207/UPMC, Muséum National d'Histoire Naturelle, Station de Biologie Marine de Concarneau, 29900 Concarneau, France; Laboratoire Mer, Molécules, Santé, Faculté des Sciences et Techniques, Le Mans Université, 72085 Le Mans, France Faculty of Nature and Life Sciences, University of Sciences and Technology-Mohamed Boudiaf, El Mnaouar BP 1505, Bir El Djir 31000, Oran, Algeria High Schcool of Biological Sciences ESSB, Oran, Algeria. Researcher city (Ex. IAP), Essenia -Oran. B P 1042, Saim Mohamed 31003 Oran 31003 Oran Algeria IFREMER, IRD, CNRS, Univ. Nouvelle Calédonie, Univ. La Réunion, UMR 9220 ENTROPIE, 101 Promenade Roger Laroque, 98897 Nouméa, Nouvelle Calédonie C2 UNIV ORAN, ALGERIA MNHN, FRANCE UNIV LE MANS, FRANCE UNIV ORAN, ALGERIA ESSBO, ALGERIA IFREMER, NOUVELLE CALÉDONIE SI SAINT VINCENT SE PDG-RBE-LEADNC UM ENTROPIE TC 0 UR https://archimer.ifremer.fr/doc/00762/87390/92887.pdf LA English DT Article DE ;Actinomycetes;Cheliff River;Estuary;Sediments;Phylogeny;Antimicrobial activity AB This study focused on the investigation of Actinomycetes strains isolated from sediment sample of Cheliff River estuary in Mostaganem (North-west of Algeria). Identification of the 5 strains of Actinomycetes isolated from sediments by morphological, biochemical methods and by16S rRNA gene sequence analysis revealed that four strains belonged to the genus Streptomyces and one - to the genus Nocardia. No strains of Actinomycetes were isolated from water samples. The optimum growth of all strains was recorded between 28°C and 30°C and at pH 7-9. All strains had halotolerant and mesophile behavior except SSG which grew very well at 45°C and could be considered as thermotolerant bacteria. Antibacterial activity was tested against five pathogenic bacteria as Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 6538, Salmonella typhi ATCC 9289, Bacillus subtilis ATCC 6633 and Pseudomonas aeruginosa ATCC 2785. All isolated strains exhibited an inhibitory activity against at least one human pathogenic bacterium. Streptomyces sp. strain SSG showed antibacterial effect against four pathogenic tested bacteria followed by Streptomyces sp. SSB1, Streptomyces sp. SSM and Nocardia sp. NSR. This study revealed that Cheliff River estuary contains Actinomycete species (Streptomyces and Nocardia) with proved antibacterial activity and could be a new source for isolation of antibiotic producing bacteria against human pathogenic bacteria PY 2022 PD MAR SO Jordan Journal of Biological Sciences SN 19956673 PU Hashemite University VL 15 IS 01 BP 7 EP 14 DI 10.54319/jjbs/150102 ID 87390 ER EF