Partial protection by respirators on airways responses following exposure in a swine house.
BACKGROUND
Exposure to swine dust leads to an intense airway inflammation and increased bronchial responsiveness. The purpose of the present study was to evaluate the effect of a respiratory protection device during exposure in a swine house.


METHODS
Twenty-two subjects, 11 with a respirator, were exposed. Symptoms, body temperature, nasal lavage, and a bronchial metacholine challenge were performed before and 7 hr after exposure. For exposure assessment a nasal sampler was evaluated.


RESULTS
The subjects with a respirator showed an attenuated inflammatory nasal response. An increase in bronchial responsiveness was observed in both groups, significantly greater in the unprotected group. The use of respirators reduced endotoxin exposure by more than 90% (assessed by nasal samplers).


CONCLUSIONS
The use of a respirator attenuated the inflammatory response compared with an unprotected group. The minor effect on bronchial responsiveness suggests that gases and/or ultrafine particles may also be important factors.
Palmberg
Lena
L
Lung and Allergy Research, The National Institute of Environmental Medicine, Karolinska Institutet, P.O. Box 287, S-17177 Stockholm, Sweden. lena.palmberg@imm.ki.se
Larsson
Britt-Marie
BM
Sundblad
Britt-Marie
BM
Larsson
Kjell
K
D000328:Adult; D000397:Air Pollution / Q000009:adverse effects / Q000032:analysis / Q000517:prevention & control; D000818:Animals; D000829:Animals, Domestic; D016207:Cytokines / Q000097:blood; D004391:Dust; D004781:Environmental Exposure / Q000009:adverse effects / Q000032:analysis / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D017817:Nasal Lavage Fluid / Q000166:cytology; D012129:Respiratory Function Tests; D012134:Respiratory Protective Devices; D012141:Respiratory Tract Infections / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control; D013552:Swine
D016207:Cytokines; D004391:Dust