(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
See other formats

Full text of "Pathogenic Bacteria"

416                 PATHOGENIC BACTERIA.

be circular and rounded, or irregular. They are said
rarely to reach a greater diameter than 2 mm. The gela-
tin is not liquefied. There is nothing distinctly charac-
teristic about the appearance of the colonies.

Upon agar-agar the superficial colonies attain a diam-

FIG. 114.—Ulceration of the intestine in a typical case of swine-fever

eter of 4 mm. and have a gray translucent appearance with
polished surface.    They are round and slightly arched.

In gelatin punctures the growth takes the form of a
nail with a flat head. There is nothing characteristic
about it. The growth in the puncture shows it to be an
optional anaerobe.