. The Ontario public school hygiene . urce,it was found that it all came from six farms. Clearly,the next step was to find out if there had been anydiphtheria among the people living on these farms. Itwas soon discovered that on one farm a child had beenseized with this disease on April nth. The cooler inwhich the milk w^as mixed on this farm was washed inthe farmhouse by the person who had nursed the sickchild. The farmer sold about one-third of his milk todairyman Mr. B., who peddled it through Hyde Park,and the rest of it to dairyman Mr. A., who deliveredit to his customers in Dorchester an
. The Ontario public school hygiene . urce,it was found that it all came from six farms. Clearly,the next step was to find out if there had been anydiphtheria among the people living on these farms. Itwas soon discovered that on one farm a child had beenseized with this disease on April nth. The cooler inwhich the milk w^as mixed on this farm was washed inthe farmhouse by the person who had nursed the sickchild. The farmer sold about one-third of his milk todairyman Mr. B., who peddled it through Hyde Park,and the rest of it to dairyman Mr. A., who deliveredit to his customers in Dorchester and Milton. MILK AND DISEASE 169 There is a kind of consumption found among cowswhich is very much Hke that which attacks humanbeings. It is called bovine consumption. When cowshave suffered for some time from this disease, it spreadsto the udder, and the germs are found in the the flesh of tuberculous cows will give humanbeings consumption or not is a matter in dispute ; butwe do know that the milk from such cows produces. FiouRE 73.—A clean well-lighted, well-ventilated cow-stable. bovine tuberculosis in weak and sickly people, andespecially in infants. It has been discovered that sometimes half the cowswhich supply milk to a town or city are tuberculous, butas a rule, not more than five per cent, of the cows inCanada or the United States are thus affected. Insome places large numbers of such animals have been 170 PUBLIC SCHOOL HYGIENE slaughtered in order to protect the public health ; butrecently the slaughter has been largely discontinued onaccount of the heavy loss which falls upon the owners. The conviction is growing every day that, if we woulddecrease the spread of this disease among cattle, wemust see to it that the stables in which they live areproperly constructed. Cow stables should be largeenough in proportion to the number of the herd to giveevery animal ample air space and plenty of light; thefood should be plentiful and of the best quality ; thebui
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