The General Infections of the Genitalia of Swine 745 



Then follow various sizes of necrotic embryos which have 

 undergone varying degrees of maceration or desiccation, as 

 shown in Figures 220 to 222. One necrotic embryo may be 

 one-half to one inch long and almost wholly disintegrated, 

 rendering its identification difficult. A contiguous dead em- 

 bryo may be two or three inches long with only slight 

 maceration or desiccation. Neighboring live embryos may 



Fig. 220 — Necrotic Swine Embryo (right) with Necrotic Fetal Sac. 

 The cadaver was expelled at full term with 8 healthy young. 



be four to six inches or more in length. The live embryos 

 show great variations in size — sometimes 100 per cent, vari- 

 ation in volume. The small fetus, the "runt" to be, is ap- 

 parently small as a result of nutritive disturbances owing 

 to the ravages of infection, and when born is wanting in 

 vigor. 



Embryonic death may occur in any order, but as a rule 

 the liability of the embryo to succumb to intra-uterine in- 

 fection conforms to the general principles laid down for the 

 cow. The most vulnerable points are the cervical end of the 

 uterus and the apices of the cornua. As a rule the first to 



