INFECTIOUS DISEASES AND MICROBES, ETC. 239 



is, therefore, a means of introducing diphtheria into 

 a household. 



Klein has also shown that a definite disease can 

 be produced in the cow by the B. diphtherice, con- 

 sisting of a diphtheritic tumour at the seat of 

 inoculation with copious multiplication of the 

 bacilli, a severe pneumonia, and necrotic change in 

 the liver; the contagious nature of the vesicular 

 eruption on the udder and 

 excretion of the bacilli 

 in the milk prove that 

 in the cow the bacilli 

 are absorbed as such into 

 the system. The mor- 

 phological characters 

 and the pathogenic ac- 

 tion of these bacilli from 

 milk were exactly the 



Same as those from FjG 47 BACILLUS DIPHTHERIA 



human diphtheria. Ac- (Klein.) 



COrding tO the Same ^presents a cover-glass preparation 

 of fresh lung exudation from a cat that 



authority, 1 litre (T76 died of naturally acquired diphtheria in 

 m'nftA nf -millr Prmrmnorl a house ^herein diphtheria afterwards 

 Q attacked the children of the household. 



between 30,000 and (x 1000.) 



40,000 bacilli; therefore, 



there is little doubt that cows suffering from diph- 

 theria are capable of transmitting the disease to 

 human beings by means of the milk ; and human 

 beings suffering from the same disease may also 

 infect a milk-supply, and so spread the disease 

 among the consumers of such milk. 



Dr. G. Turner 1 states that fowls, turkeys, and 



1 Reports to Local Governme.nt Board, 1886-7, p. 3. 



