fishes, or from brooks with enderrdc furunculosis by means of latently infected fishes. 

 The canplete eradication of the furunculosis from a fishery is extremely difficult, and 

 it can only be acco:nplished by the continuous removal, burning or -burjring of all diseased 

 or dead fishes, by prevention of spreading, through removal of mud and disinfection of 

 infected ponds, reservoirs, and the disinfecting of appliances (with lysol, potassium 

 perr.ar.r-^anate, etc.). Sick fishes convalesce best in strongly flovfin?^ water. 



^^W 



Fig. 66. Brook trout with furunculosis. Part of the 

 muscle ulcers are still closed, part of them are broken 

 open and v;ashedout. 



Fig. 67. Above: Two-summer carp with infectious abdominal dropsy. 

 The abdomen is distinctly distended, the vent somewhat everted. 

 BelccA-: A healthy carp from the same stock. 



Infectious Abdominal Sropsy . The infectious dropsy of the belly or abdominal 

 cavi.ty is, according to Schaeperclaus the most dangerou* plague and disease of carps 

 existing at the present time. It attacks not only carps but also all carp-like fishes. 

 ]ts instigator is Pseudomonas punctata , genus ascitae, a single-flagellated bacterium, 

 v/hich liquefies gelatin, and which strongly ferments dextrose and very weakly ferments 

 lactose. The disease usually starts in the intestine. To an in-testinal inflammation in 

 which long intestinal shreds are separated out, is added as a rule an illness of the 



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