Baker's asthma: old disease persists

Details

• Corporate Authors:
  Massachusetts. Department of Public Health. Occupational Health Surveillance Program
• Description:
  The earliest reports of illness associated with milling flour and baking were recorded in 1713, with descriptions of cough, shortness of breath, hoarseness, asthma and eye problems among bakers. Baker's asthma and the underlying causes were further described in the 1970s and 1980s, as immunological techniques were developed that could measure allergens. It became clear that baking and wheat flour, in particular, caused irritation, sensitization and asthma, including detectable IgE against certain ingredients. Allergic sensitization can lead to asthma and baker's eczema; eye, nose and respiratory irritation were more common adverse health effects.(1) Peer-reviewed medical articles about wheat and other cereal flours, such as rye and barley, helped establish the evidence regarding the capacity of proteins from a variety of flours to induce specific IgE sensitization after inhalation. Information was subsequently published about amylase (enzyme), a dough conditioner that is routinely added to baking flour (in milligrams per kilogram) to hasten the baking process and improve bread quality. This enzyme is frequently derived from Aspergillus oryzae and added to flour to compensate for low natural amylase levels in cereal flour and economize the baking process. In one study, efforts to reduce baker's asthma by reducing overall inhalable dust failed to reduce the incidence of baker's asthma in the UK.(2) Researchers concluded that amylase was likely the most important cause of allergy.(2) Short term peak exposures may contribute to sensitization, even when exposures appear low over a full work shift.(3) There are now several allergens documented to cause baker's asthma; baker's asthma is often preceded by rhinitis, and atopy is frequently present.(4) The identity of a causative agent in any single case may be unclear because employees are frequently exposed to many agents at once, but the risk is increased by high exposure to bakery dust. Baker's asthma is one of the most common forms of occupational asthma.(4) In France, baker's asthma ranked first among cases reported to the national observatory of occupational asthma.(5) It is estimated that 7-15% of bakers have baker's asthma.(6,7) Nine cases of baker's asthma have been reported to the Occupational Health Surveillance Program (OHSP) from 1993 to the present. Two cases are presented below from a commercial bakery. Four persons with baker's asthma were reported in retail bakeries or stores, and (3) others in food manufacturing, including a dog biscuit producer. These two cases of baker's asthma were diagnosed and reported among employees at a commercial bakery in Massachusetts by a primary care physician and allergist respectively. They each had worked for years before they developed asthma, had different jobs, and were assigned to different areas of the plant. Both were immigrants, with limited English proficiency, though from different countries, speaking different languages. Neither had seen an occupational medicine physician. These 2 cases of baker's asthma were diagnosed and managed because the physicians asked their patients about work. OHSP has an ongoing project to promote the collection of occupational information by community health centers. [Description provided by NIOSH]
• Subjects:
  Asthma Asthma, Occupational Case Reports Diagnosis Enzymes Food-Processing Industry Food Handling Food Industry Hazardous Substances Hypersensitivity Occupational Diseases Occupational Exposure Occupational Health Respiratory Tract Diseases Safety Workplace

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• Keywords:
  Allergens Allergic-reactions Allergies Bakery-workers Bronchial-asthma Case-studies Clinical-diagnosis Disease-prevention Employee-exposure Food Food-handlers Food-processing-workers Food-services Foodstuff Health-hazards Immunological-tests Milling-industry Occupational-diseases Occupational-exposure Occupational-health Proteins Pulmonary-system-disorders Respiratory-system-disorders Surveillance-programs Work-environment Worker-health Workers

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• Publisher:
  Massachusetts Department of Public Health
• Document Type:
  Text
• Funding:
  Cooperative Agreement
• Genre:
  Journal Article
• Place as Subject:
  Massachusetts ; OSHA Region 1
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-2
• NIOSHTIC Number:
  nn:20042633
• Citation:
  SENSOR Occup Lung Dis Bull 2009 May; :1-2
• Contact Point Address:
  Massachusetts Department of Public Health, Occupational Health Surveillance Program, 250 Washington Street, 6th Floor, Boston, MA 02108
• Federal Fiscal Year:
  2009
• NORA Priority Area:
  Healthcare and Social Assistance
• Performing Organization:
  Massachusetts State Department of Public Health
• Peer Reviewed:
  False
• Start Date:
  20050701
• Source Full Name:
  SENSOR Occupational Lung Disease Bulletin
• End Date:
  20260630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:12e0de379af051f81febb58bb448f78d5d740a03d4e73236b98de9834478f7a1adac8fc9f477d954cb11e04d41ca44ac8946425f5b3b94ab8b6eeb47e5538494
• Download URL:
  https://stacks.cdc.gov/view/cdc/194799/cdc_194799_DS1.pdf
• File Type:
  [PDF - 98.36 KB ]