Changes

==Bacterial Characteristics==

==Bacterial Characteristics==

*Obligate intracellular bacteria

Chlamydia species are obligate intracellular Gram negative bacteria with ribosomes, DNA and RNA and an outer membrane containing lipopolysaccharides (LPS). The peptidoglycan cell wall is resistant to lysozymes.

*Gram negative bacteria with outer membrane, LPS, ribosomes, DNA and RNA

 

*Peptidoglycan cell wall resistant to lysozyme

These bacteria only grow in the presence of living eukaryotic cells as they are unable to synthesise ATP therefore requiring intermediates from host cells. There are two morphological forms:

*Only grow in presence of living eukaryotic cells

*Elementary body, the infective extracellular form, which is small, metabolically inert and osmotically stable; surrounded by cytoplasmic membrane, outer membrane with LPS, but no peptidoglycan

*Unable to synthesis ATP therefore require intermediates from host cells

*Retiuculate body: larger, metabolically active, osmotically fragile

The elementary body survives in the environment for several days.

*Two morphological forms

**Elementary body, the infective extracellular form, which is small, metabolically inert and osmotically stable; surrounded by cytoplasmic membrane, outer membrane with LPS, but no peptidoglycan

**Retiuculate body: larger, metabolically active, osmotically fragile

*Elementary body survives in the environment for several days