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Bacteroides fragilis

Bacteroides fragilis is a Gram negative pleomorphic rod shaped bacteria. It is an obligate anaerobic, non-spore forming, non-motile bacterium. Bacteroides fragilis is a normal inhabitant of human colon but if it is displaced and spread to other surrounding tissues or ...

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Spore-forming bacteria are those bacteria that can form spores under unfavourable conditions. Spores are the dormant form of bacteria that can tolerate all the fluctuations in the environment. Spores have the least metabolic activity. When favourable conditions arrive, these spores ...

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Pyogenic Bacteria

Pyogenic bacteria are those bacteria that are involved in the formation of pus. Pus is the yellowish exudate. It is formed in the site of inflammation and abscess. It is also called pus and postule. Examples: Staphylococcus aureus., Streptococcus pyogenes Characteristics of Pyogenic ...

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Purple Sulfur Bacteria

These are the group of anaerobic bacteria that are capable of photosynthesis. They may be Microaerophillic bacteria. These bacteria are divided into two groups i.e. the Chromatiaceae and the Ectothiorhodospiraceae. They are different in their internal membranes structure and presence ...

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Atypical bacteria

Atypical bacteria are those bacteria that don’t stain with the staining as they don’t contain cell wall. These are microscopic organisms, are prokaryotic and can be observed through a microscope. Examples: Chlamydiaceae, Mycoplasmataceae Characteristics ...

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Thermophilic bacteria

Thermophilic bacteria are the bacteria that love to live in a high temperature. Thermophilic bacteria bacteria can survive in hot temperature. Examples: Thermus aquaticus and Sulfolobus solfataricus Characteristics of Thermophilic bacteria: The characteristics of Thermophilic bacteria are as follows: They can survive at ...

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