BIOL 1414 Lecture Notes - Lecture 18: African Trypanosomiasis, Amoebozoa, Protozoa
Document Summary
Deltaproteobacteria is a small group an important environmental bacterium called. Desulfovibrio that lives in sewage treatment plants, polluted streams, where sulfate is present. They reduce sulfate to hydrogen sulfide which then reacts with iron to make iron sulfide. Now iron sulfide is corrosive and degrades pipes. Bdellovibrio this attacks other gram negative bacteria and kills them to obtain food. iron sulfide (corrosive) H2s: bdellovibrio attaches to fimbriae on the attacked gram negative cell, drills through the cell wall of the prey (needs hydrolytic enzymes while rotating, it lives in the periplasmic space of the prey. There it disrupts protein synthesis of the prey: prey cell dies and the bdellovibrio eats it and is now able to form a very long filament of bdellovibrio cells, finally, the filament divides into 9 small cells. These have flagella and swim off to repeat the process. In the mound some of the cell differentiate into fruiting body .
