Pathogenicity
Infection and Transmission
The infections are generated by the pathogenic organisms present in the environment. They maintain the capacity to invade a host body and establish colonies. A disease caused by such infectious agents is called a communicable disease or transmissible disease. These diseases spread through diverse means including blood, food, water, air, or vectors.
What is a pathogenicity island and how does one move
between bacterial species?
Bacteria are unicellular prokaryotic microorganisms (nucleus is not enclosed in a nuclear membrane) present in most of the habitats on earth. Bacteria are the first living organisms to develop on earth. Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (fusiform), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes).
Pathogenicity refers to the ability of an organism to cause disease (harm the host). This ability represents a genetic component of the pathogen and the overt damage done to the host is a property of the host-pathogen interactions.
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