Related Experiment Video
Updated: Feb 14, 2026

Isolation and Identification of Bacterial Strains from Skin of Terrestrial Amphibians
Published on: June 17, 2025
Desulfothermobacter acidiphilus gen. nov., sp. nov., a thermoacidophilic sulfate-reducing bacterium isolated from a
E N Frolov1, K S Zayulina1, D S Kopitsyn2
1Winogradsky Institute of Microbiology, Research Centre of Biotechnology RAS, 33-2 Leninsky prospect, 119071, Moscow, Russia.
Abstract:
An anaerobic sulfate-reducing micro-organism, strain 3408-1T, was isolated from a terrestrial hot spring in Kamchatka peninsula (Russia). The cells were spore-forming rods with a Gram-positive type of cell wall. The new isolate was a moderately thermoacidophilic anaerobe able to grow either by sulfate or thiosulfate respiration with H2 or formate as substrates, or by fermenting yeast extract, maltose, sucrose, glucose and pyruvate. The fermentation products were acetate, CO2 and H2. The pH range for growth was 2.9-6.5, with an optimum at 4.5. The temperature range for growth was 42-70 °C, with an optimum at 55 °C. The G+C content of DNA was 58 mol%. Phylogenetic analysis of the 16S rRNA gene showed that strain 3408-1T belongs to the family Thermoanaerobacteraceae, order Thermoanaerobacterales and was distantly related to the species of the genus Ammonifex(93-94 % sequence similarity). On the basis of physiological properties and results of phylogenetic analysis, strain 3408-1T is considered to represent a novel species of a new genus, for which the name Desulfothermobacter acidiphilus gen. nov., sp. nov. is proposed. The type strain is 3408-1T (=DSM 105356T=VKM B-3183T).
Related Concept Videos
Frequency of Spring-Mass System
Consider a block on a spring on a frictionless surface. There...
Reduced Mass Coordinates: Isolated Two-body Problem
Sulfate Attack on Concrete
Sulfates from sources like soil, groundwater, or industrial effluents...
Hot Weather Concreting
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...
Reducing Line Loss
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
Masonry in Cold and Hot Weather Conditions
Other key practices include keeping masonry units...

