QUESTION 15 The incubation period is: O When mild symptoms begin to appear O The time after exposure to a pathogen when there are no symptoms When the symptoms are the worst O When healing begins QUESTION 16 The ID50: O Shows how strong a toxin is O Shows how many microbes are needed to cause infection in most cases O Shows if a microbe produces a toxin O Shows how many hosts will die
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.
Introduction
We are surrounded by various pathogens such as bacteria, viruses, fungus etc. Every day we get exposed to these pathogens but thanks to our immune system due to which we don’t fall sick daily. Our immune system fights with these pathogens daily but still we can have infections or disease due to various reasons, high pathogenicity is one among them.
Diseases can be classified into two based on communicability: Communicable disease and Non-communicable disease.
Communicable disease can be transmitted from infected person to healthy person via various means such as through sneezing, coughing, copulation, sharing grooming tools, needles etc.
Examples of such disease are: most viral infection such as HIV, flu, COVID, TB etc.
Non-communicable disease cannot be transmitted from diseased person to healthy person, examples are diabetes, many of the cancer, hernia etc.
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