title: Prevalence of rhinitis symptoms among textile industry workers exposed to cotton dust.
abstract: BACKGROUND
  The respiratory tract is one of the main points of entry of foreign substances into the body. Because of its location, the respiratory tract is heavily exposed to harmful agents, such as gases, vapors, or aerosols.
  
  
  OBJECTIVE
  Our objective was to evaluate the symptoms of occupational rhinitis in workers exposed to cotton dust.
  
  
  METHODS
  The prospective study population consisted of workers from the "Nova Esperança" Cooperative of Nova Odessa (Sao Paulo), who were studied between September and December 2008. Data were collected through an individually and privately answered questionnaire designed by the author considering the clinical criteria for rhinitis.
  
  
  RESULTS
  Using the questionnaire, we evaluated a total of 124 workers. Among these patients, 63.7% complained of nasal obstruction, 57.2% of nasal itching, 46.7% of rhinorrhea, and 66.1% of sneezing. Of the patients considered to have very serious symptoms, 9% had nasal obstruction; 9%, itching; 4%, rhinorrhea; and 6.4%, sneezing.
  
  
  CONCLUSIONS
  Aerosol agents in the environment can clearly aggravate and even initiate rhinitis. From the standpoint of pathogenesis, the mechanisms of classical allergic airway inflammation involving mast cells, IgE, histamine, eosinophils, and lymphocytes may be responsible for the development of rhinitis after exposure to high molecular weight allergens such as proteins derived from animals and plants. This study showed a strong relationship between the occupational exposures associated with work in the cotton textile industry and the symptoms of rhinitis.
  
  
  CONCLUSIONS
  Analysis of the data clearly showed the occurrence of rhinitis symptoms in these patients, demonstrating that the prevention and treatment of this condition in the workplace is extremely important.
authors.affiliation: Otorhinolaryngologist. PhD Student, University Hospital, Faculty of Medicine of Ribeirão Preto, Universidade de São Paulo (HCFMRP-USP).
authors.forename: Ivan de Picoli
authors.initials: Ide P
authors.lastname: Dantas
authors.affiliation: Postdoctoral in Otorhinolaryngology. Professor, Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, HCFMRP-USP.
authors.forename: Fabiana Cardoso Pereira
authors.initials: FC
authors.lastname: Valera
authors.affiliation: Doctor. Resident in Otorhinolaryngology, University Hospital, Faculty of Medicine, Universidade Estadual de Campinas (UNICAMP).
authors.forename: Carlos Eduardo Monteiro
authors.initials: CE
authors.lastname: Zappelini
authors.affiliation: Associate Professor. Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, HCFMRP-USP.
authors.forename: Wilma Terezinha
authors.initials: WT
authors.lastname: Anselmo-Lima
keywords: Cotton industry; Dust; Nasal mucosa; Rhinitis