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Micro/Lab004

Endospore, Capsule, Flagella

QuestionAnswer
endospore stain without heat, true or false true
what are the gram reactions of clostridium & bacillus both are gram positive
how might a capsule, & flagella contribute to an organism pathogenicity capsules prevent phagocytosis, & allows attachment prior to infection. Flagella moves organism towards host
what advantage of clostridium is an endospore endospores allow survival from aerobic conditions
You can see endospores by simple staining. Why not use this technique? endospores are visible in simple stains, however the clear areas seen could be caused by other structures such as storage granules.
how would an endospore stain of mycobacterium appear? mycobacterium would probably stain green because of the thick cell wall
what type of culture medium would increase the size of a bacterial capsule the size of bacterial capsule composed of polysaccharides would be increased by a culture medium rich in disaccharides and polysaccharides
Describe the microscopic appearance of encapsulated Streptococcus if stained with safranin and nigrosin The stretococcal cells would be red surrounded by a clear capsule against a black background
In the Dorner endospore stain, a smear with carbolfuchsin is steamed, then decolorized with acid alcohol and counterstained with nigrosin. Describe the microscopic appearance after this procedure. The endospores will be red in a colorless cell background will be black
Created by: eve amaya
 

 



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