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Updated: June 15, 2025
The existence of pleuro-pneumonia among the cattle of various States has led to burdensome and in some cases disastrous restrictions in an important branch of our commerce, threatening to affect the quantity and quality of our food supply.
When the pleuro-pneumonia of the cows raged, the butchers said, that, though the acute degree was novel, there never was a time when this disease did not occur among cattle. All men carry seeds of all distempers through life latent, and we die without developing them: such is the affirmative force of the constitution. But if you are enfeebled by any cause, the disease becomes strong.
Having heard a report that a cow belonging to my cousin, Mr M'Combie, editor of the 'Free Press, was labouring under pleuro-pneumonia, I went to see her. Mr Sorely, veterinary surgeon, was in attendance. As there had been no disease in the neighbourhood for five years, I was unwilling to credit the report.
Veterinary surgeons sent out by the Department are now allowed to participate in the inspection of the live cattle from this country landed at the English docks, and during the several months they have been on duty no case of contagious pleuro-pneumonia has been reported.
It was, therefore, denied by the veterinary surgeons in the Eastern States, that the disease in New Jersey was the true European pleuro-pneumonia, but it was called by them the swill-milk disease of New York City, and it was assigned an origin in the distillery cow-houses in Brooklyn and Williamsburg.
The Belgian Commission, appointed to investigate the nature and influence of inoculation for pleuro-pneumonia, very justly expressed an opinion that Dr. Williams had not proved that a specific product, distinguished by anatomical characters, and appreciable by the microscope, existed in this disease.
Are there any animals of the ox species decidedly free from any susceptibility of being affected from the contagion of pleuro-pneumonia? 5thly. Do the animals, which have been once affected by a mild form of the disease, enjoy immunity from subsequent attacks? 6thly. Do the animals, which have once been affected by the disease in its active form, enjoy such immunity?
Calculating on their ravenous appetite, the graziers, instead of giving them wholesome food, make them consume the worst that the farm contains, musty and mouldy fodder; and it is usually by the cough, which the eating of such food necessarily produces, that the disease is discovered and first developed. "Is chronic pleuro-pneumonia contagious?
Pleuro-pneumonia proper is neither a contagious, nor an infectious disease; hence, the denial of medical men that this so-called pleuro-pneumonia is a contagious, or infectious disease, has been the means of unnecessarily exposing many animals to its poisonous influence. In the Recuéil de Médécine Vétérinaire, for 1833, will be found a very interesting description of this fatal malady.
So soon, however, as it became known that the disease was infectious or contagious, an effort was made to trace it to its starting-point; but, in consequence of the unwillingness of dairymen to communicate the fact that their herds were affected with pleuro-pneumonia, all efforts proved fruitless.
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