CHAPTER XIV. 



SPORING BACILLI. 



SPORING bacilli are comprised in two groups : 



1. A erobic (facultative anaerobes). Non-motile : anthrax, 

 anthracoides and radicosus. Sluggishly motile : mycoides, 

 ramosus, vulgatus, mesentericus. Actively motile : subtilis, 

 megatherium. 



All the above are Gram-positive ; gelatin-liquefying ; 

 non-indol-forming, and non-gas-forming in glucose or 

 lactose ; coagulate milk slowly with little acid and then 

 digest the clot ; digest blood serum. 



2. Anaerobic (strictly). Subcutaneous injection into 

 animals causes : 



(i). No particular symptoms at site of inoculation, but 

 absorption of the soluble toxin causing (a) general 

 symptoms of tetanus, B. tetani ; (b) botulism, pupillary 

 symptoms, paralysis of tongue and pharynx, cardiac and 

 respiratory failure, B. botulinus. 



(ii). Local symptoms marked at the site of inoculation, 

 causing haemorrhagic emphysematous oedema ; (a) motile ; 

 spores oval and central, B. oedematis maligni ; spores oval 

 and excentric, B. anthracis symptomatici ; spore near one 

 end, B. enteritidis sporogenes ; (b) non-motile ; B. aerogenes 

 capsulatus of Welch and Nuttall. 



SPORE-BEARING AEROBIC BACILLI. 



Bacillus Anthracis is the cause of anthrax, a disease 

 primarily of the herbivora, cattle and sheep, but occurring 

 also in horses, pigs, and goats. Man is susceptible, and 

 contracts it either directly from the living or dead animal, 

 or from hides, wool, horse-hair, or dust arising from these. 

 It assumes two forms, external anthrax pr malignant 

 pustule, and internal anthrax which in man takes the 

 form of wool-sorter's disease and the form of intestinal 

 anthrax, in which the symptoms are more like those of 

 acute poisoning. 



In human anthrax, bacterial invasion of the blood only 



