302 MICRO-ORGANISMS AND DISEASE [chap. 



bacillus cannot be demonstrated, such case cannot be con- 

 sidered as diphtheria. As a matter of fact it has now been 

 amjily shown that the after-events prove the correctness of 

 these statements, for it has been shown that the former 

 cases, apart from their being the centre of an outbreak 

 of cases of true membranous diphtheria, develop occasion- 



TiG. 121. — Section through a diphtheritic Membrane showing connected 



M.ASSES OE THE Dll'HIHERI.A BaCILLI EXTENDING FROM THE SUREACE OF THE 

 Me.MHRANE INTO ITS DEEPER LaYERS. ThE TiSSUE OF THE MEMBRANE IS 



NOT SH(j\\'N : AS Cultures proved, all the Masses (el.ack) are M.asses 

 OF PURE Diphtheria B.\cii.li. 



Low magnification. 



ally post-diphtheritic paralysis, while the latter (non-diph- 

 theritic) cases do not lead to post-diphtheritic scquelre. 

 These cases of faucial inflammation not associated with the 

 true diphtheria bacilli, and therefore not true diphtheria, are 

 associated with, and probably caused by, either staphylococci 

 (staph, aureus) or streptococci, and are therefore regarded as 



