Multiple choice Which of the following is a sulphate reducing bacterium? Gallionella ferruginea Desulfotomaculum carboxydivorans Rhodospirillum rubrum Beijerinckia derxii Streptococcus thermophilus Reveal answer Fill a bubble to check yourself B Correct answer Explanation Desulfotomaculum carboxydivorans is a moderately thermophilic, anaerobic, chemolithoheterotrophic, sulfate-reducing bacterium.