Sheath Bacteria Example Sphaerotilus

Sheath bacteria consist of a chain of Gram-negative cells that are surrounded by a transparent tube or sheath (Figure 4.3). When the cells leave the sheath, they become motile by means of flagella and are referred to as swamer cells. The swamer cells quickly produce sheaths and form filamentous chains. There are two sheathed, filamentous bacteria in the activated sludge process: Haliscomenobacter hydrossis and Sphaerotilus natans.

FIGURE 4.3 Sheath filamentous organism. Some filamentous organisms such as Sphaerotilus natans possess a translucent sheath that surrounds the individual cells in the bacterial chain. When the sheath breaks, individual cells or swamer cells are released. These cells reproduce to form more filamentous organisms.

FIGURE 4.3 Sheath filamentous organism. Some filamentous organisms such as Sphaerotilus natans possess a translucent sheath that surrounds the individual cells in the bacterial chain. When the sheath breaks, individual cells or swamer cells are released. These cells reproduce to form more filamentous organisms.

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