Handbook of meat inspection . is, tbe organ from whicb tbe micro-organismsof fibro-plastic nephritis pass iuto tbe blood circulation—can uot, asa rule, be determiued at slaugbter. As Reick indicated, tbe navel 306 NOTEWORTHY ORGANIC DISEASES can not be assumed to be the poiut of origin. It is more probabletliat tlie disease in question arises from the excretions of infectiousmaterial tlirougli tlie kidneys, in counection with frequent intestinalinflammation in calves. Rieck states that be was unable to deter-mine any retardiug influence of tlie disease upoii tlie developmentof tlie animals. Va
Handbook of meat inspection . is, tbe organ from whicb tbe micro-organismsof fibro-plastic nephritis pass iuto tbe blood circulation—can uot, asa rule, be determiued at slaugbter. As Reick indicated, tbe navel 306 NOTEWORTHY ORGANIC DISEASES can not be assumed to be the poiut of origin. It is more probabletliat tlie disease in question arises from the excretions of infectiousmaterial tlirougli tlie kidneys, in counection with frequent intestinalinflammation in calves. Rieck states that be was unable to deter-mine any retardiug influence of tlie disease upoii tlie developmentof tlie animals. Vaerst considers spot disease of kidneys, not asproducts of patliological processes, but as the remains of incom-pletely-developed kidneys—blastem tubercles. Judgment.—Fibro-plastic nephritis in calves in the majority ofcases represents the last phenomenon of a general disease whichhas riin its course. In favor of this hypotliesis we liave the absenceof a primary alteration and the good nutritive condition of the Fig. White spot kidney (nephritis fibroplastica) of the calf. animals. In all these cases fibro-plastic renal inflammation hassignificance only as a local affection. The affected kidneys are tobe prohibited from sale as highly unfit for food on account of theirgreat deviation from the normal; while no restriction should bej)laced upon the sale of the meat. Vaerst also favored the admissionof altered kidneys after convincing himselfof their harmlessness andgood flavor after roastiiig. In extremely rare cases, in which, inaddition to the kidney disease in question, acute alterations exist inother Organs, it is necessary to proceed according to their specialcharacters (see under Pyemia ). Baderial Pyelo-nephritls of Cattle.—This disease of the kidneys isimportant on account of the frequency of its occurrence, and also ÜRINO-GENrrAL APPARATÜS 307 for the reason that when the bilateral affection occurs it may causea serious disturbiiuco of the geueral coudition
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