Table of Contents
What are the four main routes for infection to enter the body?
The transmission of microorganisms can be divided into the following five main routes: direct contact, fomites, aerosol (airborne), oral (ingestion), and vectorborne. Some microorganisms can be transmitted by more than one route.
What are a few ways diseases spread?
Infectious diseases commonly spread through the direct transfer of bacteria, viruses or other germs from one person to another. This can happen when an individual with the bacterium or virus touches, kisses, or coughs or sneezes on someone who isn’t infected.
What are the different portals of entry for a pathogen to enter the body?
The portals of entry are mucosal, respiratory, gastrointestinal, genitourinary, and cutaneous.
How are pathogens transmitted from person to person?
Pathogens can enter the body from body fluids such as blood and semen, through cuts and scratches, and through needle punctures. Sexually transmitted diseases, hepatitis, and HIV/AIDS are often spread by this route. 4. By vectors (usually through the skin or by ingestion)
How does an infection spread through the body?
An infection occurs when germs enter the body, increase in number, and cause a reaction of the body. Source: Places where infectious agents (germs) live (e.g., sinks, surfaces, human skin) Susceptible Person with a way for germs to enter the body Transmission: a way germs are moved to the susceptible persont Click on a tab below to learn more.
Where do microorganisms come from in the body?
Microorganisms capable of causing disease—or pathogens—usually enter our bodies through the eyes, mouth, nose, or urogenital openings, or through wounds or bites that breach the skin barrier.
How does disease spread from one person to another?
Droplets spread by sneezes, coughs, or simply talking can transmit disease if they come in contact with mucous membranes of the eye, mouth, or nose of another person. Contact: Some diseases spread via direct contact with infected skin, mucous membranes, or body fluids.