Inorganic Dust Organic Dust r
diffuse
b u then la
Silicosis Asbestosis Anthracosis Byssinosis Dagassosis Farmer’s lung
Asbestos is a commercial Coal Worker Pneumoconiosis Brown Lung Disease
Dense nodular fibrosis name given to certain types In grain dust or hay with a
Black lung disease
and cause of permanent of fibrous material. Seen among Coal workers and can The dust accumulates in the Bagassosis is due to moisture content of over 30%
disability and mortality. lung, producing a typical thermophilic actinomycete bacteria and fungi grow rapidly
cause industrial bronchitis,
Three types of asbestos: emphysema, and progressive discoloration that gives the (Thermoactinomyces sacchari) causing a rise of temperature
serpentine, chrysotile ,amphibole disease its name BLD to 40 -50 deg C.
safer one
massive fibrosis.
Free silica or silicon dioxide Asbestos fibers (used in Coal dust Cotton fiber in textile Bagasse or sugar cane dust Inhalation of microorganisms
Causes
found in sand, rocks manufacture of cement, and in Cane sugar industry, (thermophillic actinomycetes) from
such as granite, ceramic, roof tiling, brake lining) rope making industries paper ,rayon cardboard.
mouldy hay or grain dust
glass, plastic industry
Diffuse fibrosis
Asbestosis appear after The onset of CWP normally Appear after 20 years or
Irritant cough, dyspnea on Breathlessness ,cough, General and respiratory
5-10 years of exposure. occurs after 10 years. more of exposure.
exertion, chest pain, snow haemoptysis, slight symptoms, physical signs.
storm appearance on x-ray Cotton dust cause release of fever and mottling in
Sign & Symptoms
Asbestos is fibrous and Two phases:
(round nodules calcification histamine, which constructs lung shadow. Repeated attacks cause
insoluble pulmonary fibrosis 1 .Simple pneumoconiosis:
predominantly in upper lobes). the air passages. pulmonary fibrosis.
then carcinoma of bronchus, Asymptomatic with minor
mesothelioma of peritoneum/ impairment in pulmonary capacity Symptoms:
pleura and cancer of GIT. 2. Progressive massive fibrosis Chronic cough and progressive
Dyspnea, in advanced cases; (PMF) or Complicated CWP: dyspnea, chronic bronchitis
clubbing of fingers, cardiac development of dyspnea and and emphysema, wheezing and
distress and cyanosis. productive cough and large solid chest tightness
fibrotic nodules in the lung
The Sputum - show asbestos bodies.
parenchyma, associated with
X- ray show: Ground – glass severe respiratory disability and
appearance on radiography. early death.
1. Dust control measures : Use of safer type of asbestos. Exposure controls in the mining Exposure controls include: Dust control Wear respirator, inhibit mold
Prevention
industry including: enclosure and steaming of raw (wet process, ventilation). growth, reduce moisture
• Control of exposure during Substitution of other insulants ventilation, dust reduction cotton to reduce particle content in silage, handle
removal of stone or eg :glass fibre, calcium silicate. measures, and use of PPE. formation, dust control and PPE Personal protection. dusty materials mechanically.
processing stone or sand
through substitution of low- Dust control. Medical control (periodical
silica sand for molding and check-ups of workers).
sandblasting. Periodic examination.
Use protective equipment. Bagasse control
2. Regular physical examination ( by keeping the moisture
Continuing research. content above >20%, and
of workers & Protective
Equipment. spraying the bagasse with
2% propionic acid)
