SPECIAL REPORT ON DISEASES OF CATTLE TEXT

fissures when neglected in the early stage of formation become deep, very painful, often bleeding at the slightest touch, and when milked in that condition cause the animal to become a kicker. Occasionally the lower portions of the legs become irritated and chapped when cattle are fed in a muddy or wet yard in winter, or if they are compelled to wade through water in frosty weather. Another form of erythema occurs in young cattle highly fed and closely stabled for a long winter. The erythema appears in patches, and as it is most common near the end of the winter it is known as the "spring eruption" or "spring itch." _Treatment._--In ordinary cases of erythema the removal of the cause and the application of benzoated oxid of zinc ointment, carbolized cosmoline, or ichthyol ointment applied a few times, will restore the skin to a healthy condition. When there are fissures the zinc ointment is the best. If at the teats, a milk siphon (Pl. XXIV, fig. 4) should be used instead of milking by hand, and the calf, if one is suckled, should be taken away. The calf should be fed by hand if its mouth is affected. When the legs are irritated or chapped, dry stabling for a few days and the application of tar ointment will soon heal them. URTICARIA (NETTLE RASH, OR SURFEIT). This is a mild, inflammatory affection of the skin, characterized by sudden development of patches of various sizes, from that of a nickel to one as large as the hand. The patches of raised skin are marked by an abrupt border and are irregular in form. All the swelling may disappear in a few hours, or it may go away in one place and reappear on another part of the body. It is always accompanied with a great desire to rub the affected part. In its simplest type, as just described, it is never followed by any serous exudation or eruptions, unless the surface of the skin becomes abraded from scratching or rubbing. _Causes._--Digestive derangements caused by overloading the stomach when the animal is turned out to graze in the spring, certain feed constituents, high feeding of fattening stock, functional derangement of the kidneys, spinal and other nervous affections, are the most common sources of nettle rash. The disease consists in paralysis of the nerve ends that control the volume of the capillary vessels in certain areas of skin, thus permitting the vessels to expand, their contents in part to exude, and thus produce a soft, circumscribed swelling. _Treatment._--Administer a full dose of Epsom salt. Give soft, easily digested feed, and wash the affected parts with a solution of bicarbonate of soda (common baking soda), 8 ounces to the gallon of water twice a day, or diluted glycerin may be applied to the skin. If it assumes a persistent tendency, give a tablespoonful of the following powder in the feed three times a day: Cream of tartar, sulphur, and nitrate of potassium, equal parts by weight; mix. ECZEMA. Eczema is a noncontagious inflammation of the skin, characterized by any or all of the results of inflammation at once or in succession, such as erythema, vesicles, or pustules, accompanied with more or less infiltration and itching, terminating in a watery discharge, with the formation of crusts or in scaling off. The disease may run an acute course and then disappear, or it may become chronic; therefore two varieties are recognized, vesicular (or pustular) and chronic eczema. _Causes._--Eczema is not so common among cattle as in horses and in dogs, in which it is the most common of all skin diseases. Among cattle it is occasionally observed under systems of bad hygiene, filthiness, lousiness, overcrowding, overfeeding, excessively damp or too warm stables. It is found to develop now and then in cattle that are fed upon sour substances, distillery swill, house or garden garbage, etc. Localized eczema may be caused by irritant substances applied to the skin--turpentine, ammonia, the essential oils, mustard, Spanish-fly ointment, etc. Occasionally an eruption with vesiculation of the skin has been induced by the excessive use of mercurial preparations for the destruction of lice. It is evident that eczema may arise from local irritation to the skin or from an autointoxication. Cattle fed on the refuse from potato-starch factories develop a most obstinate and widespread eczema, beginning on the legs. _Symptoms._--In accordance with the variety of symptoms during the progress of the disease we may divide it into different stages or periods: (1) Swelling and increased heat of the skin; the formation of vesicles, which are circumscribed, rounded elevations of the epidermis, varying in size from a pinhead to a split pea, containing a clear, watery fluid; (2) exudation of a watery, glutinous fluid, formation of crusts, and sometimes suppuration, or the formation of vesicles containing pus (pustules); (3) scaling off (desquamation), with redness, and thickening of the skin. From the very beginning of the disease the animal commences to rub the affected parts; hence the various stages may not always be easily recognized, as the rubbing produces more or less abrasion, thus leaving the skin raw-- sometimes bleeding. Neither do these symptoms always occur in regular succession, for in some cases the exudation is most prominent, being very profuse, and serve to spread the disorder over a large surface. In other cases the formation of incrustations, or rawness of the skin, is the most striking feature. The disease may be limited to certain small areas, or it may be diffused over the greater part of the body; the vesicles, or pustules, may be scattered in small clusters, or a large number run together. The chronic form is really only a prolongation of the disease, successive crops of pustules appearing on various portions of the body, frequently invading fresh sections of the skin, while the older surfaces form scabs, or crusts, upon the raw, indurated skin. In old, standing cases the skin breaks, forming fissures, especially on portions of the body that bend--the neck and limbs. Thus the disease may be prolonged indefinitely. When eczema reaches its latest period, either acute or chronic, desquamation of the affected parts is the most prominent feature. The formation and shedding of these successive crops of scales constitute the character of the disease frequently denominated psoriasis. _Treatment._--The treatment of eczema is often anything but a pleasant task. There is no one method of treatment which always proves successful, no matter how early it is begun or how small an area is involved. We must endeavor to remove the cause by giving attention to the general health of the animal and to its environment. Feeding should be moderate in quantity and not too stimulating in character--green feed, bran mashes, ground oats, clean hay, plenty of salt. If the animal has been fed too high, give an active purgative--Epsom salt preferred--once a week, if necessary, and half an ounce of acetate or nitrate of potassium may be given in the feed twice a day. If the animal is in poor condition and debilitated, give a tablespoonful of the following mixture in feed twice a day: Powdered copperas, gentian, sulphur, and sassafras bark, equal parts by weight. If the animal is lousy, the parasite must be destroyed before the eczema can be cured. The external treatment must vary with the character of the lesions; no irritating application is to be made while the disease is in its acute vesicular, or pustular, stage, and, in the chronic stage, active stimulants must be used. Much washing is harmful, yet crusts and scales must be removed in order to obtain satisfactory results from the external applications. Both objects, however, can be attained by judiciously combining the curative agents with such substances as will at the same time cleanse the parts. In the vesicular stage, when the skin is feverish and the epidermis peeling off, thus exposing the exuding dermis, an application of boric-acid solution, 2 drams of the acid to 8 ounces of water, often relieves the smarting or itching, and also serves to check the exudation and dry the surface. If this fails to have the desired effect compound cresol, 1 ounce to 2 quarts of water, should be used as a wash. Either of these washes may be used several times a day until incrustation is well established. Then compound cresol, 1 ounce to 2 quarts of sweet oil, or the benzoated oxid of zinc ointment, giving the affected surfaces a thorough application once a day, will be efficacious. When the eczema is not the result of an external irritant, it takes usually from one to two weeks to heal. In chronic eczema, when there is a succession of scabs or scales, indolent sores or fissures, the white precipitate ointment, nitrate of mercury ointment, or blue ointment, mixed with equal parts of cosmoline or fresh lard, may be applied every second day, taking care to protect the parts so that the animal can not lick it off. The internal administration of arsenic often yields excellent results in chronic eczema. Dissolve 1 dram of arsenic and 1 dram of carbonate of potassium in 1 pint of boiling water, and give 1 ounce of this twice a day in water, after feeding. An alkali internally may be of service. As such, one may give 2 ounces of bicarbonate of soda twice daily. Sublimed sulphur may also be tried in ounce doses twice daily. PUSTULES (IMPETIGO). Impetigo is an inflammatory disease of the skin, characterized by the formation of distinct pustules, about the size of a pea or a bean, without itching. The pustules develop from the papular layer of the skin, and contain a yellowish-white pus. After reaching maturity they remain stationary for a few days, then they disappear by absorption and dry up into crusts, which later drop off, leaving upon the skin a red spot that soon disappears. Occasionally the crusts remain firmly adherent for a long time, or they may be raised and loosened by the formation of matter underneath. The dry crusts usually have a brown or black appearance. _Causes._--Impetigo affects sucking calves, in which the disease appears upon the lips, nostrils, and face. It is attributed to some irritant substance contained in the mother's milk. Impetigo is also witnessed among grazing animals, regardless of age, and it especially attacks animals with white hair and skin. The mouth, face, and limbs become covered with pustules, which may rupture in a few hours, followed by rapid and successive incrustations; the scabs frequently coalesce, covering a large surface; pus may form under them, and thus the whole thickness of the skin become involved in the morbid process. This form of the disease is attributed to the local irritant properties of such plants in the pasture as St. John's wort (_Hypericum perforatum_), smartweed (_Polygonum hydropiper_), vetches, honeydew, etc. Buckwheat, at the time the seeds become ripe, is said to have caused it; also bedding with buckwheat straw. _Treatment._--Sucking calves should be removed from the mother, and a purgative given to the latter to divert the poisonous substance secreted with the milk. When the more formidable disease among grazing cattle appears, the pasturage should be changed and the affected parts of the animal thoroughly anointed once a day with sweet oil containing 2 drams of carbolic acid to the pint. This should be continued until the crusts soften and begin to drop off, then the parts may be cleansed thoroughly with warm water and soap. Subsequently the white precipitate ointment or carbolized cosmoline should be applied daily until the parts are healed. PEMPHIGUS (WATER BLISTERS). This is an inflammatory disease of the skin, characterized by successive formations of rounded, irregularly shaped water blisters, varying in size from a pea to a hen's egg. _Causes._--Obscure. _Symptoms._--The formation of a blister is preceded by a congestion or swelling of the skin. Yellowish-colored water collects beneath the cuticle, which raises the latter from its bed in the form of a blister. The blisters appear in a succession of crops; as soon as one crop disappears another forms. They usually occur in clusters, each one being distinct, or they may coalesce. Each crop usually runs its course in a week. The disease is attended with itching or burning sensations which cause the animal to rub, thereby frequently producing excoriations and formation of crust on the affected region. _Treatment._--Give a tablespoonful of the following-described mixture in feed twice a day: Saltpeter, cream of tartar, and sulphur, equal parts by weight. The blisters should be opened as soon as formed, to allow the escape of the serum, followed by a wash composed of chlorid of zinc, 1 dram to 15 ounces of water. When there is any formation of crusts, carbolized cosmoline should be applied. FURUNCULUS (BOILS). This is an acute affection of the skin, usually involving its whole thickness, characterized by the formation of one or more abscesses, originating generally in a sebaceous gland, sweat gland, or hair follicle. They usually terminate by absorption, or by the formation of a central core, which sloughs out, leaving a deep, round cavity that soon heals. _Causes._--Impoverished state of blood, the result of kidney diseases or of local friction or contusions, with the entrance of pus cocci through the damaged skin or through a hair follicle or a sebaceous gland. _Symptoms._--Boils in cattle usually appear singly, not in clusters; they may attain the size of a hen's egg. The abscess begins as a small round nodule, painful on pressure, gradually increases in size until death of the central portion takes place, then the surface of the skin gives way to internal pressure and the core is released and expelled. Constitutional symptoms are generally absent, unless the boils occur in considerable numbers, or by their size involve a great deal of tissue. _Treatment._--Poulticing to ripen the abscess. If this can not be done, apply camphorated oil two or three times a day until the core is formed. As soon as the central or most prominent part becomes soft, the abscess should be opened to release the core. Then use carbolized cosmoline once a day until the healing is completed. If the animal is in poor condition, give tonics--copperas, gentian, ginger, and sulphur, equal parts by weight, 1 tablespoonful twice a day. If the animal manifests a feverish condition of the system, give half an ounce of saltpeter twice a day, continuing it several days or a week. FAULTY SECRETIONS AND ABNORMAL GROWTHS OF THE SKIN. PITYRIASIS (SEBORRHEA, DANDRUFF, OR SCURF). This is a condition characterized by an excessive secretion of sebaceous matter, forming upon the skin in small crusts or scales. _Causes._--It is ascribable to a functional derangement of the sebaceous glands, usually accompanied with dryness and loss of pliancy of the skin. The animal is hidebound, as it is commonly termed, thin in flesh, inclined to rub, and very frequently lousy. The condition is observed most often toward the spring of the year. Animals that are continually housed, and the skins of which receive no cleaning, generally present a coat filled with fine scales, composed of epithelium from the epidermis and dried sebaceous matter. This, however, is a physiological condition and compatible with perfect health. _Symptoms._--Pityriasis may affect the greater portion of the body, though usually only certain parts are affected--the ears, neck, rump, etc. The skin becomes scurfy, the hairy coat filled with branlike gray or whitish scales. _Treatment._--Nutritious feed, such as oil-cake meal, bran, ground oats, and clean hay. In the spring the disease generally disappears after the animal is turned out to pasture. When lice are present they should be destroyed. ELEPHANTIASIS (SCLERODERMA). This condition consists in a chronic thickening of the skin, which may affect one or more limbs or involve the whole integument. It is characterized by recurrent attacks of swelling of the skin and subcutaneous areolar tissue. After each attack the affected parts remain infiltrated to a larger extent than before, until finally the skin may attain a thickness of an inch, becoming wrinkled and fissured. In cattle this disease is confined to hot climates. The predisposing cause is unknown. EDEMA (ANASARCA OF THE SKIN). This is a dropsical condition of the skin and subcutaneous areolar tissue, characterized by pitting under pressure, the fingers leaving a dent which remains a short time. _Causes._--Edema generally results from a weakened state of the system arising from previous disease. It may also be dependent upon a functional derangement of the kidneys, upon weak circulation, or obstruction to the flow of blood through the lungs. In debilitated animals and in some animals highly infested with parasites there is swelling of the dewlap or of the fold of the skin between the jaws. _Symptoms._--Painless swelling of a limb, udder, lower surface of abdomen, or lower jaw becomes apparent. This may increase in dimensions for several days or may attain its maximum in less than 24 hours. Unless complicated with some acute disease of a specific character, there is not much, if any, constitutional disturbance. The deep layer of the skin is infiltrated with serum, which gives it the characteristic condition of pitting under pressure. _Treatment._--When the cause can be ascertained and removed we may expect to see the edema disappear. When no direct specific cause can be discovered and the animal is debilitated, give general tonic. If, on the contrary, it is in good flesh, give a purgative, followed by half an ounce of acetate of potassium twice a day. External applications are useless. Edema may be distinguished from erysipelas or anthrax by the absence of pain and fever. DERMOID AND SEBACEOUS CYSTS (WENS). A dermoid cyst is formed by an involution of the skin with a growth of hair on the inner wall of the sac. It may become embedded deeply in the subcutaneous tissues or may just penetrate the thickness of the skin, where it is movable and painless. They are generally found within the ear or at its base, although they may form on any part of the body. Usually they have a small opening, from which a thick, cheesy matter can be squeezed out. The rational treatment is to dissect them out. Sebaceous cysts appear not unlike the former. They are formed by a dilatation of the hair follicle and sebaceous duct within the skin, and contain a gray or yellowish sebaceous mass. The tumor may attain the size of a cherry stone or a walnut. Generally they are round, movable, and painless, soft or doughy in consistency, and covered with skin and hair. They develop slowly. The best treatment is to dissect out the sac with contents entire. VERRUCA (WARTS). Cattle are affected with two varieties of warts. One, the verruca vulgaris, is composed of a cluster of enlarged papillÊ, covered with a thickened epidermis, the number of papillÊ determining the breadth and their length its height. They are generally circular in figure, slightly roughened on the surface, and spring from the skin by a broad base. Occasionally large numbers of very thin, long, pedunculated warts grow from the skin of the ear, lips, about the eyes, and vulva. Another variety, the verruca acuminata, sometimes erroneously denominated epithelial cancers, are irregularly shaped elevations, tufted or club shaped, occasionally existing as thick, short, fleshy excrescences, giving the growth the appearance of granulation tissue. Their color is red or purplish, and oftentimes by friction they become raw and bleeding, emitting then a very offensive odor. They usually grow in clusters and their development is rapid. _Causes._--An abnormal nutrition of the skin, determined by increased energy of growth operating upon a healthy skin; at other times, upon a weak or impoverished skin.