CHAPTER 9 



Effects of Bacterial Growth 

 on the Environment 



THERMOGENESIS MISCELLANEOUS METABOLIC PRODUCTS 



PHOTOGENESIS ^^ute^^ 



CHROMOGENESIS Fibrinolysin 



Spreading factor 

 TOXINOGENESIS Pyrogens 



ENZYMES 



FERMENTATION 



PUTREFACTION AND DECAY 



COOPERATIONS AND ANTAGONISMS 



Just as physical and chemical forces affect bacterial growth, micro- 

 organisms are capable of influencing their environment in visible 

 and measurable ways. Such products of metabolism as heat, light, 

 pigment, toxin, and other miscellaneous reactions will be discussed 

 in this chapter. 



THERMOGENESIS (HEAT PRODUCTION) 



Heat is liberated during the growth and metabolism of most, 

 if not all, cells— both plant and animal. But because this generated 

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