CHAPTEK VI 



PLAGUE INDUCED IN OTHER RODENTS 



In the preceding chapters (Chapters III. and V.) we have 

 had occasion to describe the result of inoculation of mice 

 with B. pestis, and it is therefore not necessary to further 

 dwell on this subject except to state that the inoculation 

 of both the wild as also the tame mouse subcutaneously or 

 cutaneously with either the virulent type (type 1, human) 

 or the less virulent type (type 2, rat) is followed by acute 

 fatal plague, the B. pestis distributed very copiously in 

 the blood and in all viscera. 



We now proceed to describe the results of the 

 microscopic examination of the organs of rats and mice 

 dead of plague. 



Description of the Pathology of the Organs in Rats and 

 Mice infected with Plague 1 



In all instances the organs and tissues were hardened in Muller's 

 fluid in the usual manner, and fine sections of them were stained in 

 methylene-blue and eosin, the former dye picking out (blue) nuclei 

 and bacilli, the latter (red) the blood discs. 



I. — Bats inoculated cutaneously with the Virulent Type of Plague 



Eats thus dealt with — i.e. inoculated with plague of London 

 Port No. I. and Cardiff bubo type — exhibit, with very few ex- 

 ceptions, the following conditions : — 



1 Report 1903-1904, p. 380 and passim. 



129 K 



