TYPHOID EPIDEMIC. 69 



to have originated iu some transient at some of the farms sup- 

 plying the milk than to have originated in some of the 

 employees of these farms. 



Regarding "typhoid carriers" and "walking typhoid," 

 Whipple states: " Persons in whom the typhoid germs persist 

 for months or even years are typhoid carriers. There is room 

 to believe that typhoid carriers may develop from walking 

 cases, or even from those who are not cognizant of having 

 had the disease. Such cases arc probably quite rare.'' " Walk- 

 ing cases ma\' be so mild that they are not recognized as 

 typhoid fever at all. The patient, though not feeling well, 

 remains up and goes about his usual pursuits. Ultimately he 

 ma}^ recover without knowing he has had the disease, or he 

 may suddenly become seriously ill. Children particidarly are 

 liable to have mild attacks of typhoid fever ivhich go unrecog7iized .'^ 



The sources of supply of the milk sold by Overlook 

 Farms are as follows : — 



(ij Overlook Farms Dairy, 



(2) H." Y. Brady, Willow Grove, 



(3) G. Brady, Willow Grove, 



(4) N. Duffield, York Road, 



(5) E. W. Luff, Grenoble, 



(6) E. Jamison, Ivyland, 



(7) J- Terry, Ivyland, 



(8) P. Hernig, — cream, pasteurized, 



(9) Francis Farm, 

 (10) Terwood Farm. 



The bills of the Overlook Farms Dairy show that no milk 

 has been purchased from P. Hernig since August 2nd (then 

 40 quarts) ; this, along with the fact that P. Hernig milk is 

 pasteurized, excludes P. Hernig milk and cream from the list 

 of probable sources of infection. 



For future i-eference, each source of supply is designated 

 by a number, which number will be used instead of the name 

 throughout the rest of this report. 



The milk from all these supply farms reaches Overlook 



