MICROBIAL DISEASES OF MAN AND ANIMALS. 631 



charge of abscesses. Nasal discharges, saliva, or excreta of affected 

 animals may contain virulent tubercle bacteria. 



In controlling tuberculosis among humans 

 at the present time, several methods are in 

 vogue. In some localities, an effort is made 

 to segregate tuberculous patients during the 

 day for the purpose of treating them as well 

 as teaching them how to care for themselves. 

 This method aims to instruct how to prevent 

 dissemination and transmission of the disease, 

 to prepare suitable nourishment, and to secure 

 the advantages of open-air influences. This 

 instruction not only extends to the patients 

 but others with whom the patients may 

 mingle. Sanitaria are also constructed to re- 

 ceive patients suffering from the disease, and 

 care for them under suitable medical super- 

 vision by proper treatment, nourishment, and 

 open-air life. Again, the policy is being in- 

 augurated to instruct tuberculous patients, 

 where it is impossible to reach them by other 

 means, to care for themselves in their own 

 homes. 



By these general hygienic measures, much 

 good has been accomplished, not only for the 

 patients but, also, in a diminution of the num- 

 ber of new cases developing. 



The disease is carried to distant points, 

 most commonly by breeding stock. Locally 

 the disease spreads either by the movement 

 of affected cattle, or frequently by infected 

 milk. Hogs receive their infection from the 

 milk of tubercular cattle or from the manure 

 of such cattle in feeding yards. Un ventilated 

 stables are favorable for the spread of this 

 disease because with insufficient ventilation 



the bacteria are not carried out, but become FlG - no.Bact. tubercu- 

 constantly more numerous. The tubercle 



