powerful poison that causes a strong contraction of the nmseles. 

 The germ of tetanus cloes not grow in the presence of air, 

 but under im favorable conditions the germs form spores, micros- 

 copie seed like bodies that are capable of living for an indefinite 

 period and are very resistant to injurious influences, such as 

 heat, cold, moisture sunlight and strong medicines. When one 

 of these spores gets into a wound it developes into an active 

 tetanus germ and causes the disease. The germs or spores of 

 tetanus seem to be widely seattered and are particularly common 

 in the soil and manure about stables and corráis or in any 

 substance that is contaminated with excretions from animáis. 

 For this reason it is very important that the quarters where 

 animáis are kept should be mantained in as clean and hygienic 

 eoadition as possible. 



MANNER OF INFECTION 



Aa a general rule an animal contracts tetanus by the germs 

 getting into the body through a wound of some ki'nd such as nail 

 wounds of the feet, wire cuts, sores of any kind, or wounds resul- 

 tmg from surgical operations. In these cases tetanus occurs 

 without any visable wound. In these cases it is possible that 

 the germs enter the system through invisable wounds, or that 

 the germs may have been take'n 1 in with the food or water and 

 thus eaused the disease. 



PERIOD OF INCUBATION 



This is the time that elapses between the entrance of the 

 germs into the body and the appearance of the symptoms of 

 the disease. This varies from four to ten or more days. We 

 haré observed that when the period of incubation is short, eight 

 days or less, and the symptoms appear rapidly, the disease is 

 severe if not fatal, while if the period of incubation is ten' days 

 or more, and the symptoms appear slowly the disease is usually 

 of a milder form and the chances of recovery are greater. 



SYMPTOMS 

 People commonly recognize two forms of tetanus. The eom- 



