TREATMENT.—There is no other way of curing this disease, or of preventing it, than by killing the parasites and their eggs; not only on the pigs themselves, but also on the sides of the pens, sheds, rubbing-posts, or anything that an affected hog rubs against. When treating this disease, the real aim must be to kill the parasite by the prompt and continuous use of external remedies, such as washing or dipping, which is better done with some good disinfectant, one part to seventy parts water. Repeat this every ten days until cured. Two dippings are generally sufficient. It is well to feed cooling foods, such as clean slops and vegetables, containing regulator and tonic as prescribed on first page of this chapter. NAVEL RUPTURE. (_Navel or Umbilical_) CAUSE.—Injuries. Pigs crowding through narrow doorways or openings in fences, small pigs sleeping with large pigs, and allowed to pile up, or being thrown about feed troughs when feeding. Weakness and constipation also predisposes them to Navel or Umbilical Rupture. SYMPTOMS.—A soft, puffy swelling about the navel or umbilicus, varying in size from a hazelnut to that of an ostrich egg. When a pig is placed on its back the intestines will gravitate into the abdominal cavity, providing the intestines have not adhered to the walls of the rupture. TREATMENT.—This is more difficult than the Scrotal or Inguinal Rupture operation, as often times the intestines will adhere to the inner surface of the rupture and, unless the operation is carefully performed, there is great danger. Great care must be exercised in preparing the pig by fasting it for twenty-four hours. After this is accomplished, prepare an antiseptic solution, Carbolic Acid, five per cent, or Bichloride of Mercury, one in one-thousandths; also have a needle and absorbent silk or cat-gut ready. Place the pig on its back, with its head downward. Now, wash the seat of operation with either antiseptic solution. Then make an incision through the skin carefully; as stated before, intestines sometimes adhere to the inner surface of the rupture. If such is the case, wash the hands in the antiseptic solution and with the fingers carefully break the adhesions or separate the intestines from their adhesions. After this is accomplished, sew the inner lining of the abdominal cavity with absorbent silk or cat-gut. Then sew the outer skin with cotton or linen cord and your operation is complete. Feed the hog sparingly for a few days following the operation on easily digested, laxative foods. NETTLE RASH. (_Urticaira_) CAUSE.—Irritations of the skin produced by sprinkling hogs with irritating solutions and powders, or from irritating dips when treating for lice, etc. Feeding highly nitrogenous food predisposes hogs to this disease; also filth, poorly drained sheds and pens; is especially common in young pigs. Nettle Rash is not contagious, but what produces it in one hog may produce it in several at the same time.