Usage examples for bacillus:

• We grow old because every day we live beyond the age of thirty- the bacillus of old age is attacking us. "Tarrano the Conqueror" – Raymond King Cummings

• Use some good disinfectant, such as Crude Carbolic Acid, which destroys the Bacillus of Hog Cholera. "The Veterinarian" – Chas. J. Korinek

• The genus Bacillus to which the typical Stick- insects belong- has a somewhat similar geographical distribution. "The History of the European Fauna" – R. F. Scharff