Thermal death point Thermal death point 58° Thermal death point (moist) 58° C. in 15 C. in 10 minutes (moist) 58° C. in 7 minutes minutes Desiccated it dies Dies quickly, if dried Dies in 3 days if dried according to bulk in at body temperature 7 to 49 days Dies in water in 3 to 4 Dies in water in 10 to months 15 days Dies in soil in 2 to 3 Dies in soil in 4 to 6 months days Pathogenic to swine, Pathogenic to swine and Pathogenic to swine, rabbits, guinea pigs, rabbits hens, pigeons, mice, pigeons pheasants, sparrows, mice, rabbits, cattle, deer, guineapigs, etc. Guinea pigs immune =Swine Erysipelas.= =B. Coli Commune.= =Typhoid Fever.= B. of S. Erysipelas B. Typhi Abdominalis 1 to 1.5µ × 0.1 to 0.2µ 2 to 3µ × 0.4 to 0.6µ 1 to 3µ × 0.6 to 0.8µ Ends rounded Ends rounded Ends rounded Involution forms Involution forms Nonmotile in liquids Nonmotile or very Motile slightly so No flagella No flagella Flagella Stains readily and Stains uniformly or Stains uniformly uniformly polar (points clear) Stains in Gram’s (1) Bleaches in Gram’s Solu Anærobic (F. Ærobic) Ærobic (F. Anærobic) Ærobic (F. Anærobic) Active growth in common Grows well in usual Grows well in usual nutrient liquids at nutrient liquids, nutrient liquids 37° C. even if acid Usually no growth on Yellowish thick white Grows on potato; potato; variable growth on potato transparent glistening surface In gelatine In gelatine amber On gelatine clear stab-culture delicate colonies, becoming colonies with feathery branching brown; may be bubbles radiating and growth of gas encircling lines Nonliquefying Nonliquefying Nonliquefying Grows in milk; Acidifies and clots Acidifies milk growing acidifies, often milk in 8 to 10 days freely coagulates it Thermal death point Thermal death point Thermal death point (moist) 58° C. in 10 (moist) 60° C. in 10 (moist) 56° C. in 10 minutes minutes minutes Loses virulence rapidly when dried Dies in water in 18 to 20 days