78 QUEENSLAND AGRICULTURAL JOURNAL. [1 Jury, 1899. 
No. 2, Herd VI, Table EH; and Nos. 8 and 8, Herd VZZ., Table F) it may be 
assumed that the primary infection was by inhalation; while in the case of-the 
remaining 12 (Nos. 2 and 4, Herd Z., Table B; Nos. 1, 2, 8, and 5, Herd V,, 
Table D; No. 1, Herd V1., Table E; Nos. 1, 2, 4, and 9, Herd VIZ., Table F; 
and No. 1, Herd /X., Table G) the method of infection is doubtful on account 
of the diversity of organs or distinct groups of organs invaded, and also the want 
of differentiation in age appearances between the lesions in the various parts 
affected. 
Thirdly, as serving to show which organs are most likely to be attacked, 
reference may be made to Table H, which gives the frequency with which the 
several organs were found affected with tubercle. 
Tasie H. 
SHOWING THE FREQUENCY WITH WHICH Di¥FERENT ORGANS OF THE RE-ACTING ANIMALS WERE 
FOUND AFTER SLAUGHTER TO BE TUBERCULAR. 
| No. ee ai in sa oir : Een ees RY i 
whic. rgans YO. 0 nimals re-actin; nimals in 
Organs, &c., Affected. were bean Slaughtered. which Orektis were 
Tubercular. | found Tubercular. 
Lungs (and pleura) 13 23 56°5 
Liver 7. Haat =f 9 13 23 56°5 
Lymphaticglands  ... 10 23 43-4 
Bronchial lymphatics 7 23 30°4 
Mesenteric lymphatics ... 4 23 17-4 
Post-pharyngeal lymphatics 4 23 17°4 
Sub-lumbar lymphatics ... 3 23 13°0 
Hepatic lymphatics 3 23 13°0 
Mammary lymphatics . 1 23 4°3 
(Uddersye aes a. 46, Ae Me 5 } 23 21:7 
Intestines and Mesentery (net of bowels) 4 23 17°4 
Various organs ate =o at: xt 3 23 130 
Kidney ... af n 2 23 8:7 
Ovaries ... 2 a bi an et 1 23 4°3 
Peritoneum_... ee: = “244 ital 1 23 4°3 
Pericardium (heart sac) 1 | 23 4°3 
Perhaps the most striking feature in connection with the foregoing table is 
the large percentage of cases in which the udder was affected —21-7 per cent, 
of the animals that were slaughtered, and actually 1°87 per cent. of the whole 
of the milking cows tested. This is especially interesting and important, seeing 
that, whereas the percentage of cows found to be tuberculous in any form is far 
below what has been demonstrated by many observers in other countries, the 
percentage of diseased animals with tubercular udders is higher than has been 
recorded elsewhere with one or two exceptions. In fact, the majority of 
observers conclude that the number of animals with diseased udders is seldom 
more than 5 per cent. of affected animals, and is usually about 2 per cent. Tt 
is somewhat difficult to account for this inordinately high proportion of diseased 
udders in the herds examined. In this connection it is perhaps significant that 
comparatively little attention is paid by the dairy-farmers here to ordinary 
inflammations, chills, or “colds” of the udder, and that the loss of a quarter is 
usually considered of little moment. For it is indisputable that, after an 
inflammation or injury of any kind has affected a part, the latter is left in a 
weakened state and less resistant to the invasion of specific organisms such as 
the tubercle bacillus. ~ 
Another feature of the post-mortem examinations that may be noted is the 
free distribution of the disease among the different organs of the body, 
the uterus and spleen being the only important abdominal organs that were free 
from tuberculosis in the 23 cows slaughtered. 
Fourthly, as to the reliability of the tuberculin test’as an aid in the 
diagnosis of tuberculosis in cattle. It will have been observed that the whole of 
the 23 cows slaughtered out of the 24 which re-acted were found on post-mortem 
examination to be tuberculous in greater or lesser degree. The result of these 
