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Respiratory, allergy and eye problems in bagasse-exposed sugar cane workers in Costa Rica
  1. Mireia Gascon1,2,
  2. Hans Kromhout2,
  3. Dick Heederik2,
  4. Wijnand Eduard3,
  5. Berna van Wendel de Joode1
  1. 1Programa Salud y Trabajo en América Central (SALTRA), Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional de Costa Rica (UNA), Heredia, Costa Rica
  2. 2Division of Environmental Epidemiology, Institute for Risk Assessment Sciences (IRAS), Utrecht University (UU), Utrecht, The Netherlands
  3. 3Department of Chemical and Biological Work Environment, National Institute of Occupational Health (STAMI), Oslo, Norway
  1. Correspondence to Dr Berna van Wendel de Joode, Programa Salud y Trabajo en América Central (SALTRA), Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional de Costa Rica (UNA), Apdo, Heredia 86-3000, Costa Rica; bvanwen{at}una.ac.cr

Abstract

Aims To evaluate bagasse (sugar cane fibres) and microbiological exposure among sugar cane refinery workers in Costa Rica and its relationships with respiratory, allergy and eye problems.

Methods Ventilatory lung function and total serum IgE were measured in 104 sugar cane workers in five departments at one refinery before the harvesting season, and repeated for 77 of the workers at the end of the season. Information on the prevalence of respiratory and other symptoms was collected with a standardised questionnaire. During the harvesting season, inhalable dust, endotoxin and mould levels were measured among 74 randomly selected sugar cane workers across departments.

Results During the harvesting season, dust levels were relatively high in some departments, while endotoxin and mould levels were around background levels. Workers' ventilatory lung function differed between departments before, but not during the harvesting season or between seasons. During the harvesting season, the prevalence of wheeze and eye problems almost doubled in workers exposed to bagasse and other types of dust, whereas shortness of breath and rhinitis increased only in bagasse-exposed workers. Reporting wheeze and shortness of breath was positively associated with the number of years working at the refinery, suggesting a long-term health effect.

Conclusion In this refinery, the differences in workers' ventilatory lung function before the harvesting season are unlikely to be explained by bagasse exposure. However, the increase in reported symptoms (wheeze, shortness of breath, eye problems and rhinitis) over the season is likely due to irritation by dust, in particular bagasse, rather than microbiological agents.

  • Bronchitis
  • hygiene/occupational hygiene
  • health and safety
  • epidemiology
  • retrospective exposure assessment
  • allergy
  • risk assessment
  • lung function
  • exposure assessment
  • organic dusts
  • construction
  • animal workers
  • agriculture
  • occupational asthma
  • asthma
  • respiratory
  • exposure monitoring
  • fungi/moulds
  • neurobehavioural effects
  • dermal exposure

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Footnotes

  • Funding This project was funded by the Program on Work and Health in Central America (SALTRA), Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional de Costa Rica (UNA), Heredia, Costa Rica; the Institute for Risk Assessment Sciences (IRAS), Utrecht University, The Netherlands; and the Department of Chemical and Biological Work Environment, National Institute of Occupational Health (STAMI), Oslo, Norway.

  • Competing interests None.

  • Ethics approval The Scientific Ethical Committee, Universidad Nacional, Heredia, Costa Rica approved this study (CEC-UNA-021-2008).

  • Provenance and peer review Not commissioned; externally peer reviewed.

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