Diagnosis. The parasite is readily recognised, and the practitioner, moreover, is often put on his guard by the epizootic character assumed by the disease.
The prognosis is grave. Walraff declared the mortality in Grisons (Switzerland) to be as high as 20 per cent.
The treatment is identical with that of psoroptic mange in sheep. After the animals have been sheared and washed with soap, they should be completely immersed in a bath of the character mentioned in connection with sheep scab. If only one animal is infected, it may be sufficient to dress it repeatedly with an ointment containing some parasiticide.
CHORIOPTIC MANGE.
This form of mange was noted by Delafond in 1854 at the Jardin des Plantes (Paris) in some angora goats, and by Mollereau in 1889. The disease studied by Delafond had invaded both sides of the neck, the eyes, withers, back, loins, and base of the tail. It was characterised by partial loss of hair, the finer hair falling and the coarser remaining in position.
In Mollereau’s case the disease was located in one of the hind pasterns, and assumed the form of a thickened band, which produced an œdematous swelling. The chorioptes were discovered in a thick crust formed by the drying on the hair of the discharge due to their punctures.
Diagnosis. The parasites can easily be found under the crusts, and, once recognised, distinguish the disease from any other infection.
Treatment. Ointments containing some parasiticide and solutions of sulphuret of potassium generally suffice, the disease having little tendency to become generalised.
MANGE IN THE PIG.
The pig suffers from one variety only of mange. It was described by Viborg, Gürlt and Spinola, who found a sarcopt in the mange of wild boars in 1847. Hertwig and Gerlach made a similar observation some years later. Delafond in 1857 discovered the sarcopt of mange in the pig.