192 INFECTIOUS AND PARASITIC DISEASES. 



or unsuspected cases; those in contact 

 with the patient should use antiseptic 

 gargle, disinfect hands, and avoid getting 

 in the way of spray of expectoration ; fumi- 

 gate with sulphur or formaldehyde. 



Amoebic Dysentery (chronic tropical dysentery). 



(a) Cause: Amceba dy sentence, an animal parasite. 



(b) Localization: Intestinal tract. 



(c) Entry: Mouth through water, fresh fruits, and 



vegetables. 



(d) Exit: Evacuations from bowels. 



(e) Contracted: From infected water, etc. 



(f) Disinfection: Only the stools need be disinfected, 



using the same solutions as in typhoid. 



(g) Prophylaxis: Boil all water where the disease 



prevails. 



Bacillary Dysentery (acute epidemic dysentery). 



(a) Cause: Bacillus dy sentence (Shiga); non-sporog~ 



enous. 



(b) Localization: Intestines. 



(c) Entry: Mouth, through water and foods. 



(d) Exit: In evacuations from the bowels; may be 



present in vomit. 



(e) Contracted: Same as typhoid. 



(f) Disinfection: As far as known only the stools 



have to be disinfected; the bacillus has 

 about the same resisting qualities as the 



