Numerical Classification by Cluster Analysis of Thermoactinomyces Species as Compared with Some Species of Two Genera Bacillus and Paenibacillus

Isolation of species belong to endospore forming Thermoactinomyces were cared out from 27 soil samples and compared with thermoresistant bacilli belong to two genera Bacillus and Paenibacillus.
The number of Thermophilic Actinomycetes in primary isolation was (1-4)
colony /gm/102 but that of Bacilli was (3-137) colony /gm/102.
Morphological, biochemical, physiological characters and sensitivity to antibiotics were studied for (35) isolates, and classified numerically by using simple matching coefficient (Ssm) and average linkage method.
Two main clusters A and B were cared out from the herarichichal tree in
which cluster A included 3 sub clusters, A1 included 3 strains of the species Thermoactinomyces vulgaris, the sub clusterA2 included one strain of the species Thermoactinomyces intermedius, and A3 included 9 strains of the species Thermoactinomyces vulgaris, were the sub cluster B1 included 15 strain of the species Bacillus mycoides, and the sub cluster B2 included 7 strains of the species Paenibacillus spp.
This indicated the close relationship between the different species which belong to same group.