Related Experiment Video
Updated: Jul 2, 2026

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 3. Aerobiology
Published on: October 3, 2016
[Airborne transmission of infectious agents]
1Département de maladies infectieuses, institut de veille sanitaire, 12, rue du Val-d'Osne, 94415 Saint-Maurice, France. jc.desenclos@invs.sante.fr
Abstract:
Airborne transmission is one of the different ways infectious diseases spread. Airborne transmission often has an environmental source, as for legionellosis. It can also have an infectious human source. For a given infectious agent, the mode of transmission can be multiple. This is the case for influenza that can be spread by airborne transmission but also directly through respiratory secretion and indirectly through the contaminated environment. If airborne transmission may occur from person to person, it is most often a transmission from or through the environment.
Insights
Airborne transmission spreads infectious diseases, often originating from the environment, like with legionellosis. Some pathogens, such as influenza, can spread through multiple routes, including airborne and direct contact.
Area of Science:
- Infectious disease transmission dynamics
- Environmental microbiology
- Public health epidemiology
Context:
- Airborne transmission is a significant route for infectious disease spread.
- Environmental sources, such as in legionellosis, are common origins.
- Human sources can also contribute to airborne pathogen dissemination.
Purpose:
- To elucidate the mechanisms and sources of airborne disease transmission.
- To differentiate between environmental and human sources of airborne pathogens.
- To explore the multifaceted transmission modes of infectious agents.
Summary:
- Airborne transmission represents a key pathway for infectious disease dissemination.
- Pathogens can originate from environmental reservoirs or directly from infected individuals.
- Many infectious agents, like influenza, exhibit multiple transmission routes, including airborne, direct contact, and indirect environmental contact.
Impact:
- Highlights the critical role of environmental factors in infectious disease spread.
- Informs public health strategies for controlling airborne pathogens.
- Underscores the complexity of disease transmission, necessitating comprehensive prevention measures.
Related Concept Videos
Transmission-based Precautions II: Airborne and Protective Environment
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Transmission of Pathogens
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Infection
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
Tuberculosis
Reservoir of Infection

