Studies on Aspergillus Fumigatus; Toxin Production Ry Different Strains and Serological Comparison of the Strains

Abstract

Saline extracts of mycelial material from 14 different strains of Aspergillus fumigatus showed haemolytic and toxic activities. These activities were present in filtrates obtained from mycelial material incubated at 20°C for 6, 15 and 30 days and at 37°C for 6 days. The haemolysin and toxin titers decreased with an increase in incubation time and at higher incubation temperatures. The haemolytic and toxic activities could be inactivated by heating the filtrates at 70°C for 10 min. The results of serological tests demonstrated immunological uniformity for the haemolytic and toxic factors.