Cyanobacterial stimulation of growth and oxygen uptake by Legionella pneumophila

A laboratory-adapted strain of Legionella pneumophila grew in coculture with Fischerella. Insoluble Fischerella slime contained carbohydrate and protein and was isolated from cultures on filters. Slime-free filtrates separated into three 280-nm absorbance peaks on Sephadex G-25. Peaks 1 and 2 contained protein and carbohydrate and stimulated Legionella respiration. Peak 3 and slime had no effect.