43 



THE ANIMAL PARASITES OF MAN 



The proportion, however, is not only subject to variation in separate years, but 

 differs according to the district ; thus, in 1884, in the state district of Minden there 

 was one trichinous pig to 30,146 healthy animals, in Erfurt I to 14,563, in the district 

 of Gnesen I to 101, in Schrimm i to 86, and in Schroda I to 68. 



In Germany Trichinella is becoming LESS COMMON in pigs (Ostertag) : 



(a) Prussia. 



Year 



18781885 

 18861892 

 1896 ... 

 1899 ... 

 1902 



Year 



I8 9 I 

 1892 



1893 

 1894 



1895 

 1896 

 1899 

 1902 



Saxony. 



(c) City of Berlin. 



Year 



1883-1893 

 18931897 

 I9O2 



Pigs found 

 to be trichinous 



o - o6i 0*048 per cent. 

 0-0330-043 



0-021 



0-014 ,, 



O'OII 



Number of pigs 

 found to be trichinous 

 0*014 P er cent. 



O'OII ,, 



0-008 

 0-007 ,, 



0-012 ,, 



0-0102 ,, 



O-OO4 ,, 



0*0056 ,, 



Number of pigs 

 found to be trichinous 



'35 0-064 per cent. 

 0*022 0-015 ,, 

 0-006 



There is no doubt that the excellent preventive measure of 

 official inspection for Trichinella has led to the avoidance of grave 

 disasters; its introduction has not yet caused an entire cessation 

 of trichinosis in man, because inspection of pork is not obligatory 



