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  • Title: Absence of correlation between the degree of alveolitis and antibody levels to Micropolysporum faeni.
    Author: Hébert J, Beaudoin J, Laviolette M, Beaudoin R, Bélanger J, Cormier Y.
    Journal: Clin Exp Immunol; 1985 Jun; 60(3):572-8. PubMed ID: 2410168.
    Abstract:
    Specific IgG antibody (Ab) levels to Micropolysporum faeni (MF) antigen were measured in three study groups: 29 farmers of whom one had acute, two chronic and 26 with a past history of Farmer's lung disease (FLD), 91 clinically asymptomatic but exposed farmers and 23 unexposed donors. This study confirms the greater sensitivity of enzyme linked immunosorbent assay (ELISA) over double immunodiffusion (DID): 34 (37%) sera negative by DID were positive by ELISA and only two (4%) were positive by DID and negative by ELISA. Antibody levels to MF were higher in the serum of farmers whether symptomatic (113.2 +/- 196.1 u) or not (25.2 +/- 64.7 u) than in that of unexposed donors (1.05 +/- 1.46 u), (P less than 0.001). In a subgroup of farmers, antibody levels were compared in the serum and bronchoalveolar lavage (BAL) fluid; the levels were higher in the serum than in BAL fluids in all farmers except the only patient with acute FLD. A significant correlation was seen between Ab levels of the serum and BAL fluids. Finally, no correlation was seen between the serum antibody levels and the total number of cells or the percentage of lymphocytes found in BAL fluids, either in the subjects with a history of FLD or the asymptomatic group.
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