

Typhoid, Diphtheria, Scarlet Fever 401 



excreta for weeks or months. Such persons continue 

 to be a source of possible infection for a long time. This 

 fact, if carefully remembered, may save much sorrow 

 to himself and his customers. It may be added that the 

 germ of cholera, which is related to the typhoid bacillus, 

 may, on rare occasions, 

 be distributed in infected 

 milk. The precautions in- 

 dicated in connection with 

 typhoid are applicable also 

 in this case. 



Diphtheria and scarlet 

 fever. Diphtheria is caused 

 by a specific germ. This 

 has been isolated and 

 studied in pure culture. 

 Scarlet fever is probably, 

 also, caused by a microor- ^ - 

 ganism whose true nature 



c. rr*f Tr*vf fulUr n r rloT-of nr\A Fig. 62. Disease bacteria known to have 

 IS not yet lUlly Understood. * occurred in milk. 1. Diphtheria 

 rJafini + oKi- oc+aH bacillus; X 3,000. (Hewlett.) 2. 



een definitely estab- cholera vibrio; x 2,000. (Hinter- 



+Va+ mill- ma\r Ha berger.) 3. Tubercle bacillus; 



that milk may be- x | 000 (Hewlett.) 4. Typhoid 



nrk^ +ko oorrioT. nf +V>o bacillus; X 3,000. (Hewlett.) 5. 



come the carrier ot the Typhoid bacillus; x 2,000. (Hin- 

 germs of these diseases. terberger.) 

 The rules of sanitation require that the utmost care be 

 exercised in assuring the exclusion of these germs from 

 milk. Persons coming in contact with diphtheria or 

 scarlet fever patients should not be allowed to enter 

 the dairy, nor should convalescents from these diseases 

 be permitted to become a source of infection. Other 

 disease bacteria may likewise be distributed in milk. 



