105 



edema develops, especially about the face ; lungs may become edema- 

 tous; bronchial catarrh, pneumonia, or pleurisy may appear ; gradual 

 recovery. 



FIG. 46. A female trichina from the muscle. Greatly enlarged. (After Leuckart, 1866a, pi. 1, fig. 12.) 



Lethality. The lethality varies from to 100 percent; it averaged 

 5.6 per cent in 14,820 cases collected from literature; it is dependent 

 upon amount of infection which remains in the body; low before 



FIG. 47. A piece of pork with encysted trichinse. Enlarged. (After Braun, 1903, p. 251, fig. 195.) 



second and after seventh week, highest from fourth to sixth week. 

 Prognosis. Better in cases having severe diarrhea in first stage. 



