Found mainly in Gram-negative organisms, fimbriae or pili (singular: pilus) are hair-like filaments (tiny hollow projections) that extend from the cell membrane into the external environment. A pilus...
Category: General Microbiology
Flagella (singular, flagellum) are the locomotory structures of many prokaryotes. Most protozoa and some bacteria are motile. Protozoa use flagella, cilia, or pseudopods, whereas motile bacteria move...
Bacterial spores are highly resistant, dormant structures (i.e. no metabolic activity) formed in response to adverse environmental conditions. As bacterial spores are formed within the parent cell,...
Some bacterial cells are surrounded by a viscous substance forming a covering layer or envelope around the cell wall, called a capsule. Bacterial capsules can be visualized by light microscopy using...
A category A substance (pathogen or agent) is “an infectious substance which is transported in a form that, when exposure to it occurs, is capable of causing permanent disability or...
I firmly believe that Microbiology is the most exciting subject, blended with many fascinating, funny small creatures invisible to the naked eyes of humans. The world of these tiny organisms is...