300 



GENERAL MICROBIOLOGY 



III. Expose the dura mater by removing a small button 

 of the parietal bone (0.5 cm. in diameter) with a trephine. 



IV. Inject the inoculum immediately beneath the dura 

 mater. 



V. Replace the periosteum and suture the skin. 



VI. Disinfect. 



8. Intrapulmonary. I. Pull the animal's front leg for- 

 ward. 



FIG. 65. Another Method of Injecting Hog- cholera Serum, (Orig.) 



II. Plunge the needle through the fifth or sixth inter- 

 costal space into the lung tissue. 



III. Slowly inject the contents of the syringe. 



Note. In large animals material may be injected into the trachea 

 between the tracheal rings. 



9. Ingestion. If possible mix the infectious material 

 with the animal's food. 



Note. See that the animal eats all that is intended to be eaten. 



Introduce the infectious material into a gelatin capsule 

 and force the animal to swallow it; or give the material as 

 a drench where advisable. 



