How Do Infectious Diseases Spread

Matrix Lesson Lesson plan. in module 2, students learn how infectious diseases are spread. students identify key components of a chain of infection, assess the spread of an infectious agent, and design evidence based prevention strategies to reduce disease spread. students also learn what it takes to pursue a public health career as an infection prevention. An easy way to catch most infectious diseases is by coming in contact with a person or an animal with the infection. infectious diseases can be spread through direct contact such as: person to person. infectious diseases commonly spread through the direct transfer of bacteria, viruses or other germs from one person to another.

How Germs Are Transmitted Learn about the different types of direct and indirect contact that can spread infectious diseases, such as malaria, measles, and respiratory illnesses. find out how to prevent disease transmission with simple hygiene and precautionary measures. Infectious diseases are illnesses caused by harmful agents (pathogens) that get into your body. the most common causes are viruses, bacteria, fungi and parasites. infectious diseases usually spread from person to person, through contaminated food or water and through bug bites. some infectious diseases are minor and some are very serious. As noted earlier, the causation and spread of an infectious disease is determined by the interplay between agent, host, and environmental factors. for any infectious disease, this interplay requires a specific linked sequence of events termed the chain of infection or chain of transmission (figure 6). Organisms can spread—or be transmitted—by several routes. contact: some diseases spread via direct contact with infected skin, mucous membranes, or body fluids. diseases transmitted this way include cold sores (herpes simplex virus type 1) and sexually transmitted diseases such as aids.

An Introduction To Infectious Disease Science In The News As noted earlier, the causation and spread of an infectious disease is determined by the interplay between agent, host, and environmental factors. for any infectious disease, this interplay requires a specific linked sequence of events termed the chain of infection or chain of transmission (figure 6). Organisms can spread—or be transmitted—by several routes. contact: some diseases spread via direct contact with infected skin, mucous membranes, or body fluids. diseases transmitted this way include cold sores (herpes simplex virus type 1) and sexually transmitted diseases such as aids. Chickens and other domestic poultry can transmit avian influenza to humans through direct or indirect contact with avian influenza virus a shed in the birds’ saliva, mucous, and feces. figure 16.3.4 16.3. 4: (a) a mechanical vector carries a pathogen on its body from one host to another, not as an infection. But how do diseases spread to begin with, and what do we know about fighting epidemics? sixty percent of the infectious diseases that plague humans originate with animals, and particularly with bats. bats, which evolved 66 million years ago, are among the world’s oldest mammals and have been living with viruses a very long time.

Infectious Disease Epidemiology An Introduction вђ Howmed Chickens and other domestic poultry can transmit avian influenza to humans through direct or indirect contact with avian influenza virus a shed in the birds’ saliva, mucous, and feces. figure 16.3.4 16.3. 4: (a) a mechanical vector carries a pathogen on its body from one host to another, not as an infection. But how do diseases spread to begin with, and what do we know about fighting epidemics? sixty percent of the infectious diseases that plague humans originate with animals, and particularly with bats. bats, which evolved 66 million years ago, are among the world’s oldest mammals and have been living with viruses a very long time.