DELTA - vegetative cells that move by gliding, leaving a...

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DELTA-PROTEOBACTERIA ( δ  -PROTEOBACTERIA ) includes bacteria that prey  on other bacteria and also contributors to the sulfur cycle.  a)  Bdellovibrio  is the main genus. There attach to other gram-negative bacteria and penetrate into  the periplasmic space (between outer membrane and plasma membrane). The original invader  elongates and breaks into pieces, producing several new cells. The host cell lyses and releases  them. b) DESULFOVIBRIONALES—this order of obligate anaerobes use oxidized sulfur as terminal  electron acceptors, producing hydrogen sulfide which is released into the atmosphere.  1)  Desulfovibrio  is the best-studied genus. 2)  Beggiatoa  is another genus in this group. c) MYXOCOCCALES--fruiting and gliding bacteria. The geuns  Myxococcus  produces 
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Unformatted text preview: vegetative cells that move by gliding, leaving a slime trail. They feed on other bacteria. Large numbers aggregate (gather) and form a macroscopic fruiting body containing resting cells called myxospores. Later these myxospores germinate and form vegetative gliding cells. EPSILON-PROTEOBACTERIA ( -PROTEOBACTERIA) slender rods, helical to vibroid. Microaerophilic and motile by flagella. a) Campylobacter vibroid with one polar flagellum 1) Campylobacter fetus spontaneous abortions in domestic animals 2) Campylobacter jejuni foodborne intestinal disease (diarrhea) b) Helicobacter curved rods with multiple flagella. H. pylori is the cause of most peptic ulcers in humans and can even be involved in stomach cancer ....
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