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Rod-shaped bacteria
• Bacteria (1) include those microorganisms, which, as rule, do not produce spores (E.coli, Salmonella, Shigella).
• Bacilli (2) (B.anthracis) and clostridia (3) (C.tetani, C.botuli- num) include organisms the majority of which produce spores.
• Size of rod-shaped bacteria varies 2-10 µm: small rods are 2-4 µm; long rods are 5-1µm
Rod-shaped bacteria refer to a specific shape of bacteria cells that resemble rods or cylindrical shapes. These bacteria are classified based on their shape and various other characteristics.
1. Bacteria: This term refers to a broad category of microorganisms that do not produce spores, which are specialized structures that allow certain organisms to survive in unfavorable conditions. Examples of bacteria that are rod-shaped include E.coli, Salmonella, and Shigella.
2. Bacilli: Bacilli are a specific type of rod-shaped bacteria that belong to the Bacillus genus. These bacteria are known for producing spores. An example of a bacillus is Bacillus anthracis, which is the bacteria responsible for causing anthrax.
3. Clostridia: Similar to bacilli, clostridia are also rod-shaped bacteria that produce spores. This group includes bacteria such as Clostridium tetani, which causes tetanus, and Clostridium botulinum, responsible for botulism.
The size of rod-shaped bacteria can vary, typically ranging between 2 to 10 micrometers (µm). Smaller rods are usually around 2 to 4 µm in length, while longer rods can measure between 5 to 10 µm. The size can vary depending on the specific species or strain of bacteria.