CHAPTER V 



The Amoebae (Continued) 



Endamoeha coli. Morphology. Prevalence and Im- 

 portance. Habitat and Effects. Court cihnania lafleuri. 



ENDAMOEBA COLI 



The most common amoeba of the intestine of man, 

 Endamoeba coli, was, according to Dobell and O'Con- 

 nor (1921), first studied by Lewis (1870) and Cmi- 

 ningham (1871) in India. It is in prevalence, num- 

 bers, and size, the most prominent of this class of 

 parasites. 



MORPHOLOGY 



The active form may vary from ten to forty microns 

 in diameter but is usually between twenty and thirty. 

 In the actively motile condition, taken fresh and 

 warm from the contents of the higher large intestine, 

 it is usually much less energetic than Endamoeba 

 histolytica, moving about more slowly, not in such a 

 '^streaming" manner, and its pseudopodia are less 

 prominent, less clear and not so ''explosive." The 

 ectoplasm and endoplasm are not so well divided and 

 there may be but little difference except in the pseudo- 



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