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- X S % ^ 



dicated in connection with f ( 



typhoid are applicable also / #k ' ^ 



/.C 



in this case. 



Diphtheria and scarlet 

 {ever. — 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- ^. i . 

 ganism whose true nature •# • f 



iQ nnf v<»f fnlliT- imHoraf r»r»rl Fig. 62. Disease bacteria known to have 



IS not yet luiiy unaerstooa. ^ occurred in miik.- r. Dipiitiieria 



Tt. Vin<5 hppn dpfinitphr fis+ph- bacillus; X 3,000. (Hewlett.) 2. 



It nas oeen aenniteiy estao- cholera vibrio; x 2,000. (Hinter- 



liishpfl tViat milt mmr Vip- berger.) 3. Tubercle bacillus; 



usnea tnat muK may oe- ^ 3,000. (Hewlett.) 4. Typhoid 



pnmf> thp nnrvipr nf +>ip bacillus; X 3,000. (Hewlett.) 5. 



come lue td,IIier OI ine 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. 



