Report on observations made upon the cattle at the experimental station at Outremont, P.Q. recognized to be tuberculous by the tuberculin test / by J. George Adami and C.F. Martin.

  • Adami, J. George (John George), 1862-1926.
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: Report on observations made upon the cattle at the experimental station at Outremont, P.Q. recognized to be tuberculous by the tuberculin test / by J. George Adami and C.F. Martin. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    the earlier samples, we examined the milk from time to time to observe whether they had made their appearance. COW No. I.—Bacilli found occasionally in January milk, more frequent in February. Towards end of February, constantly found in milk about 15 in the field. From now on, through the samples of March, April and June milk examined, regularly found. COW No. II.—Doubtful, and if present only very rarely and irregularly, the milk became very scanty and watery in August, but still free from bacilli. COW No. III.—Rare beaded forms recognised in milk of February 14th, undoubted bacilli in milk of March 24th; in that of March 26th, again absent COW No. IV.—Three different samples of February milk showed bacilli, rare, one to three upon the slide. A few were found in the milk of March 24th as again in that of March 26th, immediately before and after these dates they were absent. Throughout May and June, not found, nor again in July milk. A few were found in milk of August 4th, after this they again disappeared. Present again upon August 24th, 25th, 27th and again in milk of week beginning September 3rd. COW No. V.—Previous to March milk steadily decreased in bulk becoming yellowish and viscid until the animal became quite dry. The viscid milk contained very numerous cocci. Early in February doubtful bacilli were occasionally encountered. Throughout the latter end of February and beginning of March the fluid contained no bacilli. COW No. VI.—Rare bacilli found in latter end of January ; throughout February and early part of March absent. In milk of March 26th found in very great numbers. From this time on, not seen again till J une 29th when a few doubtful forms were seen, the next day’s milk showed none. From July 4th onwards until August 9th the bacilli were found in the majorit}’’ of samples examined ; upon August 23rd, again found, absent on August 24th. COW No. VII.—One doubtful specimen in January; since then the milk hus been constantly free from bacilli. COW No. VIII.—A few bacilli of March 24th milk; none found at any other time. COW No. IX.—None found previous to death in March. COW No. X.—A small number of bacilli found in the August and September milks with fair regularity. RESULT OF EXAMINATIONS. It will be seen from the above table that in only two milks, even when these milks were concentrated by centrifugalisation, were bacilli found in any considerable numbers. In one of these, cow No. 1, bacilli were eventually found constantly, in the other, No. 6, they were apparently absent for several weeks during February and March and found constantly at the end of March; in one sample they were found in very great numbers. They again disappeared till the end of June, when a few dubious forms were seen ; throughout July they were frequently found, disappeared again and were found on one occasion in August. Cows No. 2, 5, 7 and 9 through the series of either showed no bacilli at all or rare very doubtful forms which we cannot term typical and certain bacilli. The other animals, namely, cows No. 3, 4, 8 and 10 at no time showed any large number of bacilli but on rare occasions presented forms which we were compelled to describe as undoubted bacilli. The variation in these four milks is of interest because when the bacilli were present they were unassociated with any recognizable change in the condition of the animal.