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.
Identify physical and chemical barriers to pathogens. How
might these barriers be compromised?
Physical and chemical barriers of the body prevent the entry of opportunistic pathogens into the host. These barriers provide defensive mechanisms to the host body in various ways like restricting entry into the cell, maintaining an unsuitable environment for microbial growth, and killing the microbe.
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