2.1 Transmission of Pathogens

There are different ways in which pathogens spread around and cause infectious diseases, including:

  • Direct Transmission
    Direct transmission of a pathogen occurs when a healthy person comes in contact with an infected individual or the source of disease. Direct contact can be simple skin-to-skin contact, sexual contact, or exchange of bodily fluids.
  • Indirect Transmission
    Indirect transmission of pathogens occurs when there is a medium for contact between a healthy individual and the infected individual. This medium can be any physical object, sharing of utensils, using the same instruments, etc.
  • Vector-borne Transmission
    Vector-borne transmissions occur via other organisms. Infectious diseases are spread around through carrier organisms such as insects and bacteria. For example, dengue fever is transmitted through mosquito bites.

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