MUNICIPAL HYGIENE 675 



pterygoids, heart muscle, and those of the shoulder and 

 haunch. 



C. cellulosce affects the muscles of the pig, the cysts 

 closely resembling those of C. bovis. The muscles chiefly 

 affected are those of the tongue, heart, muscles of mastica- 

 tion, neck, chest, muscular part of the diaphragm, and 

 sometimes the liver. 



There are no statistics available to show what proportion 

 of British pigs are affected with this disease, but both on 

 the Continent of Europe and in the East it is frequently 

 met with. 



Measly beef and pork may contain a few or many cysts ; 

 but no distinction should be made between them until an 

 institute exists corresponding with the German Freibank 

 (see p. 679) ; until that time arrives the whole carcase of 

 even a slightly affected case should be destroyed. 



Trichinosis. — This disease is mainly found in American 

 pigs, and those of the Continent of Europe, especially in 

 Germany. We have previously (p. 666) referred to the 

 systematic examination which pork receives in Germany. 

 It receives none in this country in spite of the amount of 

 bacon we import from America, and it cannot be doubted 

 that trichinosis finds its way in. 



Ingestion of the flesh containing the parasites causes their 

 liberation in the intestines, from here in the course of a 

 few days they pass into the muscular tissues. Swine con- 

 tract the disease from eating rats, mice, and the flesh of 

 their own species infected with trichinae. 



The muscles most commonly affected are the pillars of 



the diaphragm, shoulder, loins, larynx, tongue, cheeks, and 



intercostals. In Germany the microscopical inspection is 



very thorough, no inspector is allowed to examine more 



than twenty pigs a day, and there is a stipulated time, 



varying in different districts from fifteen minutes to half an 



hour, during which the examination must last. Women 



do a great deal of the work, and in one place they 



combine it with midwifery. In some districts special 



rewards are paid for the discovery of trichinosis, which 



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