Part 6

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

Lives and even Lives and grows in multiplies in rich fæces soils, manure, etc.

Loses virulence slowly in light and air

Pathogenic to swine, pigeons, sparrows, rabbits, white and house mice, white rats

Guinea pigs, field mice and hens immune