296 HUMAN PHYSIOLOGY CHAP. 



tions. The streets should be clean and well drained, all 

 garbage and excretions from patients suffering from the 

 disease should be properly disposed of, and an abun- 

 dance of clean, wholesome water should be provided for 

 domestic purposes. All yellow fever patients should 

 be isolated and their excretions carefully disinfected. 



208. Grippe. This disease, which has become very 

 common of late, is due to a bacillus. It is highly con- 

 tagious, and that accounts for its 

 rapid spread among persons col- 

 lected in large numbers, as in schools, 

 factories, and shops. The germs are 

 probably inhaled and then develop 

 rapidly in the mucous membrane of 

 the air passages. The common symp- 



FIG. !6o.- Bacteria of t()ms ^ Q ffi chm headache and 



grippe. 



violent pains in the spine. Adults 

 usually suffer much more than children from an attack 

 of grippe or influenza. 



If every case could be reported at once and the patient 

 completely isolated until fully recovered, the spread of 

 this disease might be checked. 



209. Pink Eye. This is a disease of the mucous 

 membrane lining the lids and covering the front of the 

 eyeball. It is caused by a specific disease germ. This 

 disease is contagious and may be transmitted by any- 

 thing that comes in contact with the matter discharged 

 from a diseased eye. The hands and towels are the 

 most common means of spreading the germs. 



The eyes become red and inflamed and discharge a 



