Examples of sheathed bacteria include Sphaerotilus and Leptothrix which exhibit a filamentous structure, resembling fungi, hence are often referred to as sewage fungus.
They typically thrive on the surfaces of contaminated water sources.
These bacteria have a filament-like sheath that encompasses the individual cells of gram-negative bacteria.
Preferring environments rich in organic matter, they are commonly found in sewage-laden waters.
