Bactiral Nutrition

Bactiral Nutrition

Dr.kareema Amine Al-Khafaji ,Assistant professor in microbiology, and dermatologist Babylon University , College of Medicine , Department of Microbiology.

Nutrition: is a process by which organisms acquire chemical substances (Nutrients) used in cellular activities such as metabolism and growth. Organisms differ in the use of particular elements, their source and chemical form.
Microbial growth
Microbial growth refers to both the increase in cell size and number of cells in a population.

Cell division

Bacteria divided by binary fission; by 1- chromosomal duplication 2-synthesis of a new membrane and cell wall in the center of the cell form a septum that eventually divides the cytoplasm into two daughter cells ,each contain a complete chromosome.
Generation or doubling time : The average generation time for bacteria is 30-60 minutes under optimum conditions. Most pathogens such as Staphylococcus aureus and Escherichia coli, double in 20– 30 minutes. The longest generation time requires days. E.g.Mycobacterium leprae that causes leprosy doubles in 20 to 30days.