_Prevention._ In the older countries horsemen too often accept strangles as inevitable. They expect that all horses will have it sooner or later, and it is not worth while to guard against it. The too absolute doctrine of the identity of the germ with the microbe of erysipelas, puerperal fever, contagious pneumonia, influenza, of the suppurations of the limbs and feet in sheep and cattle, and other streptococcic infections seems to corroborate this view. But on the other hand the absence of strangles from given countries like Iceland where erysipelas and its coadjutors are common, its absence from secluded breeding farms and districts in America, though prevailing all around them, the rapidity of its spread when introduced in a sick colt, and the entire failure to extend in the same way from an erysipelatous man to susceptible young horses with which he comes in contact show that preventive measures may be successfully applied for its restriction and extinction. The conceded family resemblance of the microbes and the experimental production, by their inoculation, of lesions showing many points of similitude leave them still sufficiently distinct in their pathogenesis to warrant measures for the suppression of the variety which produces strangles. _Precautions for the private owner._ During the existence of strangles in the district, _exclude strange horses, asses or mules_ from the farm or stable. Keep young susceptible horses from _public stables or yards_ (livery, feeding, training, fair, market, and above all, dealers’ and sale stables) and even from _public drinking troughs_ and _buckets_ used in common. Provide against their contact with _manure_ from strange or infected stables, or with _pastures_, _fields_ and _wagons_ on which this has been put, also against the use around the stable or on fodder of _forks_ or _other implements_ that have been used for such manure. Avoid _hay_ or other _fodder_ or _litter_ from a strange barn or one that is open to any suspicion of infection. Avoid _running water_ that has drained land, stables, or yards where strange horses have been, or those open to suspicion. In shipping by car or other _public conveyance_ disinfect the latter before the animal is loaded. If a _second hand wagon, shafts, pole, harness, blanket_ or other object is brought on the place or used, disinfect the same before using.