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 irom the muscle. GrSatly enlarged. (After Leuckart, 1866a, pi. 1, fig. 12.) 



Lethality. — The lethality varies from to 100 per cent; 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 trlchinEe. 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. 



