107 



slide, cover with a cover slip, and examine under low power. Or, if 

 necessary, make a microscopic examination. 



(4) Of small excised portion of patient's deltoid, about three to 

 four weeks after infection, for encysted larvae; cut a small piece 

 parallel to muscle fibers, tease this on a slide, add a drop of pure 



FIG. 50. Calcified trichinae in uncalcified cysts, from pork. Enlarged. (After Ostertag, see Braun, 1903, 



p. 285, fig. 213.) 



Water, or water and glycerine, cover with another slide, flatten 

 gently by pressure while examining under low power. 



Suspect trichinosis especially under following circumstances: 

 Several patients in same family or in same neighborhood, usually of 

 North German descent, show typhoid-like symptoms shortly after a 

 celebration (wedding, birthday party, etc.) at which pork was served. 



FIG. 51. Three phases of calcification of trichinae and their cysts, the changes starting from the poles of 

 the cysts. Enlarged. (After Ostertag, see Braun, 1903, p. 285, fig. 214.) 



Differential diagnosis. Consider especially typhoid fever and 

 rheumatism. 



Treatment. Purge in early stage to carry away the adult \vorms 

 and thus eventually decrease the amount of muscular infection. No 

 treatment is known which can be relied upon to kill the larvae in the 



