TRICHINIASIS OF MAN AND ANIMALS. 15 



a few days, but recovered, and ate well. Examination at the same 

 time with the others gave negative results, although a queer-looking 

 condition of the abdominal cavity existed. Why these hens did not 

 die of septicaemia I do not know. 



I had hoped to carry on numerous feeding and therapeutic ex- 

 periments during my examinations of pork in 1SS1, but lack of 

 means on my own part, as well as on the part of the Board of 

 Health of Massachusetts, prevented their accomplishment. 



Teichiniasis ra Swine. 



As we have previously mentioned, the disease was discovered 

 in swine by Leidy, in 1847. 



It is to German observers that we must look almost entirely for 

 any authoritative statements with reference to the percental infection 

 of swine with these pests, for in no other country is there at present 

 anything approaching a systematic examination of pork, and even in 

 Germany there is much room for improvement. 



To make the statistics valuable, it is necessary that the law 

 should require that, at least so far as domestic consumption goes, 

 all hogs should be examined before being cut up, and that only one 

 part — viz., the pillars of the diaphragm, or psoas muscles — should be 

 used for examination. There is no evidence that this is the case in 

 Germany, hence I much doubt whether it would not be possible to 

 largely increase their present ratio of infection. The following 

 statistics have been gathered at random, with no attempt at com- 

 pleteness, but simply as illustrations, from the books in my own 

 library, such as Yirchow's " Archiv," the " Yierteljahrsschrift f iir 

 gerichtliche Medicin," the " Deutsche Zeitschrift fur Thiermedicin," 

 " The Veterinary Reports of Saxony and Hanover," the " Magazin 

 f iir Thierheilkunde " (Gurlt u. Hertwig), the " Archiv f iir Thier- 

 heilkunde," and the " Mittheilungen aus d. Praxis d. Preussischen 

 Staate." 



For Rostock, Germany, Petri gives the following : 



1869 N/uinber bogs examined, 5,457 ; trichinous, 1 



1871 " " " 6,520 " 2 



1872 " " " 6,555 " 



1873 " " " 6,441 " 3 



1874 " " " 6,731 " 2 



1875 « " " 7,222 " 5 



1876 " " " 7,165 " 



1877 " " " 7,562 " 2 



Total 53,653 15 



Trichinous, l - 354:3. 



