APPENDIX 



OUTLINE FOR STUDY OF THE CONTROL OF COMMUNICABLE 



DISEASES 



1. Infective agent 



2. Source of infection 



3. Mode of transmission 



4. Incubation period 



5. Period of communicability 



6. Method of control 



{A) The infected animal and its environment: 



1. Recognition of the disease 



2. Isolation 



3. Immunization 



4. Quarantine 



5. Concurrent disinfection 



6. Terminal disinfection 

 (B) General measures. 



As anthrax is a typical communicable disease, it will be taken 

 as an example to show how the above outline may be used in 

 studying each of the diseases described in Chapter XXI. 



ANTHRAX 



1. Infective Agent. — Anthrax bacillus. 



2. Source of Infection. — Soil, forage, stagnant water, and feces 

 of infected animals. 



3. Mode of Transmission. — The ingestion or inhalation of the 

 infective agent, and through accidental wounds of the skin. 



4. Incubation Period. — One to five days. 



5. Period of Communicability. — While the infected animal is 

 carrying a fever and until lesions have ceased to discharge. 

 Infected objects such as the soil and forage, and the hair and 

 hides of infected animals may be capable of communicating the 

 disease for weeks, months, or years. 



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