Growth of bacteria

Bacterial Growth

Bacterial growth : 

Bacterial growth means ‘’development of a bacterial into its mature pathogenic form ‘In other words it means’’ Orderly increase in all the components of the bacteria’’

Bacterial multiplication: bacterial multiplication may be defined as ‘’increase in the number of that organism or generation of bacteria’’

Bacteria multiply by binary fission .that is one giving rise to 2,2, to 4,4to,8,8to 16 and so on.

Growth requirements of bacteria:

  A.Nutritional factors:

  1.Source of energy :

Examples: Carbohydrates, proteins, lipids etc.

  2.Growth factors:

( a)Essential growth factors:

Examples: Amino acid, folic acid, fatty acid etc.

( b)Essential factors:

Examples: Potassium, calcium, iron etc.

( c)Accessory factors:

Examples: X-factors, V-factors etc.

  B.Environmental factors:

Examples:

  1.Presence of absence of O₂

  2.P^H of the medium

  3.Light and radiation

  4.H₂O

  5.Osmotic pressure

  6.Temperature.