Peritonitis
The vaginal tunic derived from the peritoneum continuesthrough the inguinal canal to line the interior of the scrotum. Itis composed of 2 layers, the visceral tunic which attachesfirmly to the tunica albuguineaaround the testis and theparietal tunic, which is continuous with the parietal peritoneumof the abdomen (Schumacher 2012). As a result of this
communication many horses exhibit a nonseptic peritonitis,characterised by elevated cell counts >100 ¥ 109/l, for up to 5or more days following castration