Critical studies of fermentation: Tentative cultural and sero-logical differentiation of some strains of A. niger
Riv Biol 15(3/4): 280-298
Among 209 isolations, groups could be differentiated biochemically according to whether they produced either citric acid, gluconic acid, or neither. None of the 30 cultural media served to clearly differentiate strains. Serological differentiation by agglutination of macerated mycelium and of spores was successful in low dilutions but is not highly specific since the reaction is not dependable in dilutions greater than 1:140. Best results were secured when spores used for inoculating the rabbit were first shaken in acetone to remove the fats.