800 r.oAKi) OK AGRicui/rruK. 



iu the liirRor ones a thousand. I'olliciilar mange is said to J»e more con- 

 tagions ill tlK' lioy tliaii it is in oilier animals, and is considered a serious 

 disease. 



The scab mite (Sarcoptes Scabies var. Latr.) is one of the largest of 

 the species, and when found can be seen with the naked eye. They work 

 deep in the skin, and it is dilticult lo find tliem. Tlie female is about one- 

 fiftieth of an inch long and almost as broad. The male is not as large. 

 The mite has eight very short, thick, conical-shaped legs, the two posterior 

 ones being quite or almost concealed beneath the abdominal surface. 

 On the dorsal surface are a number of parallel ridges interrupted by coni- 

 cal projections. Toward the posterior part of the body are a few bail's. 



Symptoms.— It begins with a violent itching about the head, especially 

 at the base of the ears, about the eyes, and gradually extends to the neck, 

 withers, inner surfaces of the thighs and the whole body. The invaded 

 areas of the skin are first covered wijh little red pimples. Abrasions 

 from the hog rubbing itself soon occur. The secretions and scales from 

 the skin gradually accumulate, the bristles drop out or become matted 

 and the skin is greatly thickened and wrinkled. In old cases the scales 

 on the skin give it a dirty white color. 



The mites live in galleries in the deeper layers of the skin, and they 

 multiply rapidly. Hog mange is not communicable to other animals. 



Treatment.— Hog mange is difficult to treat. It does not seem to spread 

 rapidly among hogs and can be easily controlled by isolating or destroying 

 the affected animals. The pig houses and pens should be disinfected or the 

 pigs moved to fresh quarters after being treated. Before applying the 

 remedy, the skin must be scrubbed with a strong allcaline soap in order to 

 remove as many of the scabs as possible. A tobacco dip can be used, 

 but in severe cases a mixture of eight parts oil of turpentine and one 

 part flowers of sulphur is a better remedy. It is best to apply the remedy 

 with a brush and rub the skin quite hard. Sulphur or nitrate of lead 

 ointment may also be used. 



Internal Parasites. Ascarides of the Pig.— The natural habitat of the 

 common round worm of hogs is the small intestines. It may be found in 

 the large intestines, but its presence there is accidental. They are some- 

 times found in the stomachs of hogs examined a short time after death. 

 This is due to reverse peristalsis of the intestines or to the movements 

 of the worms themselves, and they are destroyed in a short time hy the 

 media in the stomach. It is not unusual to find them extending into the 

 common bile duct, some even enter the gall bladder while others imbed 

 themselves in the ducts coming from the various lobes of the liver. 



In young and unhealthy pigs they are a common parasite. It is not 

 unusii.il to find from ten to twenty of these large white worms in a single 

 individual. They may be so plentiful as to fill the lumen of the intestine 

 for several feet of its length. In examining the intestine of twelve hun- 

 dred apparently healthy hogs, 10.5 per cent, were found to contain round 



