Are you often
getting sick at your job? Answer the following questions in yes
and no. If the answer of any one is yes then you may be
suffering from Occupational asthma:
experience coughing, wheezing or shortness of breath at work?
Do you have
itchy red eyes or running nose at work?
Does the problem
goes when you are away from work and comes back when you
return to work?
is the most common
occupational lung disease in most part of the
world. It is responsible for 2 % to 15 % of the asthma
prevalence. The frequency varies widely between different
occupations and within industry at different level of exposure.
asthma is a respiratory disease caused by the exposure to a
trigger at the work place (be it dust, gases, vapors, fumes or
chemicals). When inhaled these triggers irritate the airways and
may cause Coughing, sneezing, chest tightness, pain in chest,
difficulty in breathing. It may be associated with skin, eye and
asthma attack occur:
asthma without latency
attack brought on immediately by exposure to extremely high
levels of irritant gases such as ammonia, sulfur dioxide,
chlorine. This is also known as Reactive Airways Dysfunction
Occupational asthma with latency (Long term sensitization)
Body develops an
allergy from continuous exposure to a specific substance,
sometimes over the period of months and years. Symptoms of OA
occur when body develops allergic response to the substance
Due to exposure to
is precipitated. The walls of the airways become
inflamed and swollen. Lot of mucous is secreted blocking the
airways. This makes it difficult for the air to be exhaled or
pushed out of the lungs.
are commonly known as triggers. At least 240 substances are
known to cause Occupational asthma when inhaled. They are classified in 5
smoke, sulfur dioxide, chlorine gas, ammonia.
Grain flour and
Like Grain dust and flours (like wheat & rye), proteins of
cereal grains, sea food, egg processing, green coffee beans,
castor beans, ispaghula.
allergens & proteins:
These are found in hairs, furs,
dander, scales, saliva and other body wastes like excreta.
are used in pharmaceuticals, detergents, flour conditioners,
1. Acid anhydrides, isocyanides,
complex platinum salts, poly amines,
2. Reactive dyes, units manufacturing paints, varnishes,
3. Laminates, soldering fluxes, resins used in soldering.