BACTERIOLOGY IN A NUTSHELL. 



Bacilli 

 Method of 

 Multiplication. 



Spore 



Forming 



Bacilli. 



learned are called the "staphylo-cocci." The 

 process of division and subdivision is kept up 

 as long as the germs have proper soil to exist 

 upon, provided, also, the food, temperature, 

 air and moisture are such as they require. 



Bacilli multiply in much the same way and 

 under conditions similar to those required by 

 the micro-cocci and spirilla. This is especially 

 true of the bacilli which are non-spore- forming. 



With regard to the spore-forming bacilli, 

 when they can no longer obtain sufficient or 

 proper food or surroundings, they shrivel or 

 dry up and appear to be dead. They may keep 

 up this semblance for months, but let conditions 

 once more become favorable for their develop- 

 ment and we soon find they not only are not 

 dead, but are not even sleeping merely resting. 

 Place them in suitable culture media, for in- 

 stance, and immediately they begin to germi- 

 nate and produce innumerable micro-organisms 

 of the same variety as those from which they 

 sprang. They do not reproduce other spores • 

 at once, but never fail to reproduce that char- 

 acteristic variety of bacillus which is spore- 

 forming. Fortunately for the human family 

 the number of spore-forming bacteria is small, 

 and not one is known to be instrumental in 

 producing a pestilential, epidemic disease. 



There are certain changes which take place 

 in the bacilli when the process of seed or spore 

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