Bacteria Study Documents - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

75

Pages:

2
Author:

Mariam A. A.

Bacteria ✓ This is a class of cellular pathogen. ✓ Bacteria are unicellular, microscopic organisms without membrane-bound organelles. This means that they are prokaryotes and do not have cell membrane or membrane bound organelles ✓ However, they do have a cell wall that may be surrounded by a capsule (jelly-polysaccharide layer)- separates internal from external environment ✓ Bacteria have a circular thread of double helix DNA which is in the form of a single, large chromosome in cytoplasm. They also have plasmids which are circular DNA molecules. ✓ They undergo asexual reproduction via the binary fission process. - Unicellular organisms -> prokaryotes -> do not have any membrane bound organelles i.e., no mitochondria, nucleus, cell membrane and does not have anything that has a membrane around it. (non-membrane bound means no membrane around it) ✓ Bacteria basically exist ‘everywhere’ that we go, and many are actually beneficial to us. ✓ The harmful bacteria cause disease by asexually reproducing inside host organism and secrete toxins that are harm the host organism’s cells, tissues or organs. ✓ We can kill bacteria using antibiotics. ✓ They are often classified into according to their shape. The common groups are spherical, rod, spiral, comma or oval shape. ✓ Some bacteria have a ‘tail’ called flagellum that allows them to move in water. Example of Bacteria Name of Bacteria Mycobacterium Tuberculosis Name of Symptoms Disease Tuberculosis ✓ Coughing ✓ Chest pain ✓ Fever ✓ Chills Mode of Transmission Air transmission via water droplet (released due to coughing or sneezing)

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