Bacteria

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• Bacteria

• Bacteria were unicellular. Found almost everywhere e.g. : water, soil, plants, animals and humans. There are two types :> Pathogenic ( disease causing) and Non - Pathogenic

• Conditions for Growth Food: Bacteria can be > Saprophytic: Feeding on non living matter causing spoilage e.g. lactic acid bacteria spoils milk. > Parasitic: Feed on living matter such as animals and humans causing disease e.g. Staphylococcus Aureus causes staph infections on the skin.Oxygen: Bacteria can be : > Aerobic: e.g. Mycobaterium Tuberculosis >Anaerobic: e.g. Clostridium botulinum. > Faculative: e.g. E. coliTemperature: Bacteria can be : > Psychrophilic: e.g. listeria > Mesophilic: e.g. E. Coli > Thermophilic: e.g. Thermus aquaticus Temperatures below 15° slow down, freezing temperatures inactivate and above 70° destroy. Moisture: Requires moisture for growth. Grow best in humid conditions and on food with a high water activity above 0.90aw e.g BreadPh level : Most grow best in slight acidic or neutral environments (ph 6-7). Extreme acidic or alkaline conditions inhibit bacterial growth. Time: Require time to grow. In ideal conditions, will double every  20 minutes    

• Structure of Bacteria Cell Wall: Gives structure                                                                         Cytoplasm: contains nuclear material (DNA) > Ribosomes (allow production of protein) > Food vacuoles - store foodCapsule : Protective layer that surrounds the cell wallFlagellae:Log thread like structures that assist in movement        

• Bacteria Cell Drawing 5786db0a5f9b5831b54f017c (binary/octet-stream)

• Binary Fission (binary/octet-stream)

• Reproduction Of Bacteria (binary/octet-stream)