Table 2—

Cut-off values of serological results (number of precipitating arcs) by antigen and immunological techniques

AntigensCut-off
Double diffusion
Absidia corymbifera1
Eurotium amstelodami1
Wallemia sebi1
Aspergillus fumigatusND
Saccharopolyspora rectivirgula1
Streptomyces mesophilic1
Mouldy hay extractND
Electrosyneresis
A. corymbifera1
E. amstelodami2
W. sebi2
A. fumigatusND
S. rectivirgula1
Streptomyces mesophilic2
Mouldy hay extractND
  • ND: nondiscriminative antigen. To transform serological results from number of arcs (discrete variable) to positive or negative (dichotomous variable) using this table, serological results must be coded as 0 (negative) if the number of arcs is below the cut-off value, and as 1 (positive) if the number of arcs is equal to or above the cut-off value.