124 MICRO-ORGANISMS AND DISEASE. [CHAP. 



casts ; that the capillaries of the glomeruli of the Malpighian 

 corpuscles, and the afferent arterioles, contained numbers of 

 bacilli, some of the capillaries being distended by and 

 plugged with masses of bacilli densely aggregated. In 

 February, 1881, a similar but less extensive outbreak 

 occurred at Nottingham, among fifteen persons that had 

 partaken of certain baked pork. The symptoms were 

 similar to those in the Welbeck outbreak. One case ended 

 fatally. Post-mortem: bloody exudation in pericardium, 

 intense pneumonia, mesenteric glands enlarged, enteritis, 

 Peyer's glands enlarged. Bacilli similar to those of the 

 above case were found in the blood, in the pericardial 

 exudation, in the juice and in the bloody fluid rilling the 



FIG. 58. ISOLATED BACILLI IN A SMALL ARTERY OF THE SAME KIDNEY AS IN 

 PRECEDING FIGURE. 



Some bacilli contain spores. 



alveolar cavities of the inflamed lung, in the vessels of the 

 kidney, in the submucosa of the inflamed Peyer's glands of 

 the small intestine, in the blood-vessels of the spleen and 

 around them. 



The bacilli vary in length between 0*003 and 0*009 mm - > 

 their thickness is about 0-0013 mm. They are rounded at 

 their extremities, single or in chains of two, and some con- 

 tain a bright oval spore, situated in the centre or at one end, 

 and about o'ooi mm. thick. This was the case with the 

 bacilli in the glomeruli of the kidney of the Welbeck case. 

 The bacilli containing spores were thicker than those without 

 them, 



