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Friday, 16 November 2018

Pathogenic Micro organisms in the Body

Pathogenic micro organisms usually establish themselves in our bodies and cause diseases

• when the body resistance is low;

• when the normal microflora in the body is disrupted by antibiotic therapy; and

• in infants where the normal microflora is not established yet.

    The following conditions lower the body's ability to twist or fight against pathogens:

• malnutrition;

• stress and overwork;

• harmful habits like smoking and drinking; and

• environmental pollution.

How micro organisms enter the body 

      The various ways In which and places through which pathogenic micro organisms enter the body are as follows:

• Through cuts, wounds and abrasions on the skin, e.g Clostridium tetani (found in soul) which causes tetanus

• Through the nose and mouth, e.g. influenza virus

• Through the mouth and oesophagus, e.g. entamoeba histolytica which causes amoebic dysentery

• Through direct contact, e.g. ringworm fungi and the spirochaete which causes syphilis

How pathogens harm the body:

Pathogenic micro organisms harm the body

• by using the Host's nutrients for their own growth and reproduction and thus starving the host tissue's;

• by destroying or damaging the tissues of the affected part of the body;

• by producing toxins or poisons which affect the functioning of a particular organ or system in the body. (Toxins are produced as waste products by micro organisms)