Bronchitic symptoms

Evidence against the involvement of dust enzymes is the finding that byssinosis does not occur in woolen mills which have an abundance of enzymes in the environment (y. Further, cotton willowing mills, which have high enzyme levels, have a low incidence of byssinosis. It is proposed, however, that enzymes may be responsible for the high prevalence of bronchitic symptoms (53%) among workers in these plants (19). 

The reported proportion of casualties who fully recover from sulfur mustard respiratory injury varies from over 90% (Vedder, 1925) to only 20% (Balali-Mood, 1986). Much of this variation can be explained by differences among patients and by attribution of chronic bronchitic symptoms to previous mustard gas exposure in the presence of ongoing causes such as heavy smoking. Major chronic problems such as bronchiectasis and recurrent pneumonia appear confined to casualties who had severe pulmonary infections complicating the acute injury (Urbanetti, 1988). Ocular and skin injuries generally heal completely but with the need for corneal transplantation or for skin grafting to deal with uncommon complications. 

Lipfert FW, Morris SC, Wyzga RE (2000) Daily mortality in the Philadelphia metropolitan area and size-classified particulate matter. J Air Waste Manag Assoc 50 1501-1513 McConnell R, Berhane K, Gilliland F et al (1999) Air pollution and bronchitic symptoms in Southern California children with asthma. Environ Health Perspect 107 757-760 McConnell R, Berhane K, Gilliland F et al (2003) Prospective study of air pollution and bronchitic symptoms in children with asthma. Am J Respir Crit Care Med 168 790-797 McDonnell WF, Nishino-Ishikawa N, Petersen FF et al (2000) Relationships of mortality with the fine and coarse fractions of long-term ambient PMio concentrations in nonsmokers. J Exposure Anal Environ Epidemiol 10 427-436... 

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