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Occupational asthma is new onset asthma or the recurrence of previously quiescent asthma directly caused by exposure to an agent at workplace. It is an occupational lung disease and a type of work-related asthma. Agents that can induce occupational asthma can be grouped into sensitizers and irritants.
Asthma is a respiratory disease that can begin or worsen due to exposure at work and is characterized by episodic narrowing of respiratory airways. Occupational asthma has a variety of causes, including sensitization to a specific substance, causing an allergic response; or a reaction to an irritant that is inhaled in the workplace.
The use of Agent Orange has been controversial in New Zealand, because of the exposure of New Zealand troops in Vietnam and because of the production of herbicide used in Agent Orange which has been alleged at various times to have been exported for use in the Vietnam War and to other users by the Ivon Watkins-Dow chemical plant in Paritutu ...
An asthmagen is a substance that can cause asthma in exposed people. [1] Workplace asthmagens induce what is called occupational asthma. [2] [3] A 2016 study of occupational asthmagens in Australia identified 277 in 27 groups, including ammonia, latex, pesticides and wood dust. [4]
TCDD is the most potent compound of its series (polychlorinated dibenzodioxins, known as PCDDs or simply dioxins) and became known as a contaminant in Agent Orange, an herbicide used in the Vietnam War. [4] TCDD was released into the environment in the Seveso disaster. [5] It is a persistent organic pollutant.
Agent Orange, a defoliant used by the British in the Malayan Emergency and the U.S. in the Vietnam War, was equal parts 2,4,5-T and 2,4-D (2,4-dichlorophenoxyacetic acid). 2,4,5-T itself is toxic with a NOAEL of 3 mg/kg/day and a LOAEL of 10 mg/kg/day. [3] Agent Pink contained 100% 2,4,5-T (dioxin
Veterans and Agent Orange: Health Effects of Herbicides Used in Vietnam. Washington, D.C.: National Academies Press. January 15, 1994. ISBN 978-0309075299. OCLC 1013384268. Institute of Medicine (US) Committee on Blue Water Navy Vietnam Veterans and Agent Orange Exposure (June 1, 2011). Blue Water Navy Vietnam Veterans and Agent Orange Exposure ...
Exposure to bacterial endotoxin in early childhood may prevent the development of asthma, but exposure at an older age may provoke bronchoconstriction. [70] Evidence supporting the hygiene hypothesis includes lower rates of asthma on farms and in households with pets. [69] Use of antibiotics in early life has been linked to the development of ...
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