PREVENTION 20I 



area of another animal dead from the disease, death ensues 

 in from one to two days. It is preceded by rise of tempera- 

 ture, loss of appetite and general indisposition. The site of 

 inoculation is swollen and painful and drops of bloody serum 

 may sometimes be seen exuding from it. At autopsy the sub- 

 cutaneous cellular tissues and underlying muscles present a 

 condition of emphysema and extreme oedema. The oedema- 

 tous fluid is often blood stained and the muscles are of a blackish 

 or blackish brown color. The lymphatic glands are markedly 

 hyperaemic. The internal viscera present but little alteration 

 visible to the naked eye. In the blood stained serous fluid about 

 the point of inoculation short bacilli are present in large 

 numbers. These often present slight swellings at the middle 

 or near the end. They are not seen as threads but lie singly 

 in the tissues. If the autopsy is made immediately after 

 death, these organisms may not be detected in the internal 

 organs, but if not made until after a few hours, they will be 

 found there also. In recent autopsies only the vegetative 

 forms of the organism may be found, but later (in from 

 twenty to twenty-four hours) spore-bearing rods may be 

 detected. With the "corn-stalk" disease the inoculated 

 animals will remain well. 



§ 158. Prevention. In checking the spread of the 

 disease it is very important wherever it is possible to remove 

 the well animals from the infected field and to restrict the sick 

 ones to a small one. The swellings should not be opened and 

 the discharge scattered over the field. The dead animals 

 should be burned if possible, otherwise buried deeply and 

 covered well with lime as soon as possible after death. Birds 

 and other animals should not be allowed to feed upon the car- 

 casses and the skin should not be removed. Every precaution 

 to restrict the spread of the bacteria of this disease should be 

 taken. It is very desirable to thoroughly disinfect the ground 

 where the animal lay at the time of death. The spores are 

 ver}' resistant both to disinfectants and the natural destructive 

 agencies such as sunlight and drying. It is not wise to use 

 land for grazing purposes for susceptible species upon which 

 animals have contracted the disease. 



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