DIFFERENTIAL DIAGNOSIS II3 



mation, both epicarditis and pericarditis being present. In one 

 case the lungs were affected. In all, fifteen cases were ex- 

 amined, and from these this composite description of the post- 

 mortem appearances is drawn." 



Hemorrhages on the serous membranes and punctate ne- 

 croses in the liver seem to be quite characteristic lesions. 



Post mortem wo^M.-These are a few taken from. Curtice's 

 publication. 



" Goose No. I. Died last night ; quite fat. Right lung, ventral por- 

 tion quite firm, whitish. Some flocculi of exudate in peritoneal cavity. 

 l,iver shows numerous point-like necrotic foci. Blood thick, blackish 

 and tarrv. Mucus glassy on dusky mucosae of nose and throat. 



" Goose No. 2. Died last night. Somewhat thinner than No. i. 

 Ecchymoses on fat in abdomen and gizzard and on heart muscle ; 

 necrosis in liver. Blood thick, tarry. Mucus in nasal passages. 



" Gander No. 7. Died last night ; now cold. No well marked hem- 

 orrhagic lesion in pleuroperitoneal cavity. Whitish points in liver. 

 Hemorrhagic or extremely hyperemic condition of duodenum. Jeju- 

 num, or second coil of intestine, filled with a glairy mucous fluid in 

 which are suspended shreds and patches of food (?). Few if any necroses 

 in liver." 



§ g8. Differential diagnosis. The disease here described 

 is caused by Bacterium septicemiae hemorrhagicae which re- 

 sembles that of fowl cholera and other members of that group 

 of bacteria. A diagnosis, therefore, is made positive by finding 

 this organism in the tissue of the sick and dead geese. 



M'Fadyean has described a disease under this title causing 

 the death of many geese in which he found the blood swarm- 

 ing with bacteria suggesting Bad. septicemiae hemorrhagicae 

 but morphologically different, but which he could not induce 

 to grow on any of several media in cultures under both aerobic 

 and anaerobic conditions. It appears that this is a different 

 disease from that described by Curtice. 



§ 99. Prevention. The procedure that can be suggested 

 at present is isolation of the well from the sick, repeating the 

 separations as often as new cases appear. The infected pens 

 should be thoroughly disinfected before being reoccupied. 



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