Изображения страниц


The Superintendents of the various neat-cattle quarantine stations report the names of the importers and the number and breed of each lot of animals imported during the year 1886, as follows:

[merged small][graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small]


5 George G. Ware, Clearwater, Dak.

Liverpool..... Hereford


Whole number of cattle received at the various stations from January 1, 1886, to

January 1, 1887. Littleton station ...

495 Garfield station

504 Patapsco station..

12 1,011

Table showing the number of cattle received at the various quarantine stations for

each month of the year 1886.

[graphic][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]

Table showing the different breeds of cattle and the number of each breed imported

during the year.

[blocks in formation]

No infectious or contagious disease appeared among the animals quarantined at the above stations during the year. Respectfully submitted.

D. E. SALMON, D. V. M.,

Chief of Bureau of Animal Industry. Hon. NORMAN J. COLMAN,

Commissioner of Agriculture.


PLATE I.—Ulcerated cæcum of a pig inoculated with blood from a case of hog

cholera. The entire mucous membrane has undergone necrosis. Near the valve, in the upper portion of the figure, the early stage, that of ecchymosis, is still to be seen. The valve is slit open to show the intact mucosa of the ileum. This figure also serves to illustrate the appearance presented by the cæcum and colon when pigs have been fed with pure cultures, the only difference being that in the latter case the necrosis is at first superficial. In the figure it involves the entire thickness of the mucosa, having begun in the submucosa, whither the bacteria

have been carried by the blood. PLATE II.- Ulcerated cæcum of a pig fed with viscera from a case of hog-cholera.

The cæcum is slit open to show the mucous membrane quite uniformly necrosed, with isolated deeper ulcerations. The ileo-cæcal valve is very much thickened, the mucous membrane ecchymosed and ulcerated. The lymphatic glands of the meso-colon and in the angle formed by the entrance of the ileum into the cæcum are purplish, with cortex engorged with extravasated blood. They illustrate the condition of the lymphatics of both thorax and abdomen in the acute hemorrhagic form

of the disease. PLATE III, FIG. 1.-Cover-glass preparations from the spleen of a rabbit inoculated

with the bacterium of hog-cholera from Nebraska. Stained for a few minutes in an aqueous solution of methyl violet, mounted in xylol-bal. sal. Drawn with camera lucida, Zeiss ty homogeneous, ocular 3. x 1110 The bacteria are seen among diffusely stained cells. They are chiefly

in pairs, in some of which the process of division is not yet completed. FIG. 2.-Cover-glass preparation from the liver of a rabbit inoculated with the

microbe of pneumonia in pigs. Stained in an alkaline solution of methylene blue. Mounted and drawn as stated in Fig. 1. The colored portion

is confined to the two poles, the central region remaining colorless. PLATE IV, FIG. 1.-Culture twenty-eight days old in a tube of nutrient gelatine of

the microbe causing pneumonia in pigs. The culture was prepared from the internal organs of a rabbit which had been inoculated from a cult

ure obtained originally from Geneseo, Ill. FIG. 2.-Culture eleven days old of the same microbe obtained from Sodorus, Ill.

Both natural size, FIG. 3.-Colonies of the same microbe on a gelatine plate seven days old. x 60.

The pale peripheral zone, which appears after three or four days in beef infusion peptone containing 10 per cent. gelatine, together with darker

granular nucleus, is very constant. FIG. 4.-Gelatine tube culture from the blood of a rabbit inoculated with a cult

ure of the hog-cholera bacterium from Sodorus, Ill., ten days old. FIG. 5.-Tube culture of the hog-cholera bacterium inoculated from cultures of

the spleen obtained from Sodorus, Ill., fourteen days old.

In Figs. 4 and 5 the two modes of surface growth of the hog-cholera bacterium are illustrated, both distinguishable from Figs. 1 and 2. See

Plate V. FIG. 6.-Colonies of hog-cholera bacteria on a gelatine plate four days old x 100. PLATE V, Fig. 1.-Surface growth in gelatine tubes, enlarged two diameters.

a. Bacterium of hog-cholera, growing as an irregular patch, flattened, with a jagged margin and occasional slender branches, and as a convex rounded head.

6. Microbe of pneumonia, growing as a very thin pearly patch, with lobed margin, often showing faint concentric lines when viewed ob

liquely. a, twenty days old; b, twenty-six days old. FIG. 2.-Gelatine tube culture of a bacterium which resembles the bacterium of

hog-cholera very closely, but which differs in its physiological properties, and which has no pathogenic effect on animals. Found associated with the microbe of pneumonia in the spleen of a pig (Geneseo, Ill.). Culture about a week old. The surface growth is very vigorous, covering after a tiine the gelatine completely. The peculiar mesh-work shown

in the figure is a constant character. FIG. 3.-Growth of the bacterium of hog-cholera on potato twelve days after PLATE VI.-Coagulation necrosis in the liver of rabbits inoculated with cultures of


hog-cholera bacteria. FIG. 1.-Cephalic aspect of the liver of a rabbit which was found dead on the sixth

day after inoculation. The lighter spots are groups of acini destroyed by. the growth of bacteria. The larger patch to the left shows groups of acini

in which the necrosis has involved only the peripheral zone of the acini. FIG. 2.-Liver of rabbit which died on the eighth day after inoculation. The

caudal aspect is shown with two extensive patches of commencing necrosis. In both only the peripheral zone of the acini is involved, giving

the discoloration a mottled appearance. PLATES VII to IX inclusive.-Photo-micrographs of the bacteria producing hog

cholera and swine-plague. Made with the Zeiss camera, using the new He apochromatic homog. immersion objective, projection ocular No. 4. Magnification 1,000 diameters. The preparations, stained either in Bismarck brown or fuchsin, were mounted in Canada balsam. Illumina

tion from an incandescent electric lamp. PLATE VII, FIG. 1.-Bacterium of hog-cholera. Cover-glass preparation from the

liver of a rabbit inoculated with cultures from Illinois. Stained for one

hour in an aqueous solution of Bismarck brown. FIG. 2.-Liquid culture of the bacterium of hog-cholera from Illinois. Stained

in Bismarck brown. PLATE VIII, FIG. 1.–Bacterium of hog-cholera from Nebraska. From a culture in

beef infusion less than twenty-four hours old, inoculated from a colony on a gelatine plate. Stained for one hour in an aqueous solution of Bis

marck brown. FIG. 2.-Micrococci of swine-plague. From a culture in beef infusion about

twenty hours old. This culture was obtained from a gelatine tube culture of effusion and plastic exudate in the pleural cavity. The lungs were

extensively hepatized. Stained for one hour in aniline water fuchsin. PLATE IX, FIG. 1.-Cover-glass preparation from the liver of a rabbit inoculated with

a bit of lung tissue obtained from an outbreak of swine-plague in Iowa, January, 1887. Stained in Bismarck brown for one hour, decolorized in

1 per cent. acetic acid for a few moments. Note the polar stain. FIG. 2.-Cover-glass preparation from the blood of a pigeon inoculated from a

culture of the microbe of swine-plague from Iowa. Stained in aniline

water fuchsin. PLA”E X.-Contagious pleuro-pneumonia. Lung of a diseased steer from Phoenix

Distillery, Chicago, Ill. PLATE XI.—Contagious pleuro-pneumonia. Lung of a cow slaughtered in Balti

more, Md. PLATE XII. —Contagious pleuro-pneumonia. Lung of a cow slaughtered in Balti

more, Md.

Calf-Raising on the Plains.

PLATE I. -Ready for “cutting out."
PLATE II.-"Roping” and “ cutting out."
PLATE III.-Roping a steer to inspect brand.
PLATE IV.-Throwing a steer.
PLATE V.-Branding a steer.

[graphic][merged small][merged small]
« ПредыдущаяПродолжить »