The Journal of Infectious Diseases, Vol. 31: Published by the John McCormick Institute for Infectious Diseases (Classic Reprint) - Softcover

Hektoen, Ludvig

Softcover

ISBN 10: 1331945283 ISBN 13: 9781331945284

Verlag: Forgotten Books, 2015

Inhaltsangabe

Excerpt from The Journal of Infectious Diseases, Vol. 31: Published by the John McCormick Institute for Infectious Diseases

The results show that some bacteria possess a marked degree of pathogenicity while others possess none, or give only a slight reaction which would probably occur from the introduction of any foreign fluid into the milk ducts or cisterns. One can summarize in general terms only because the resistance of the animal must be taken into considera tion, and the intricate phenomenon following the introduction of foreign protein into the animal tissue is difficult to follow. The life histories of almost all of these animals have been accurately kept, and, with one exception, there is no record of the animals having suffered from infected udders up to the time the experiments were begun.

It is apparent that a certain quantity of infected milk containing a nonhemolytic streptococcus causes a more severe mastitis than the same amount of a 24-hour broth culture which contains infinitely more organisms than the milk. Whether this is due to the organism losing its virulence immediately on artificial cultivation, or whether it is due to the metabolic products formed in the milk by the streptococci, as Meyer has stated, cannot be determined definitely at this time. The milk con taining the hemolytic streptococci and the cultures of the hemolytic streptococci with one or two exceptions did not cause the severe reac tions that were caused by the nonhemolytic streptococci. In some cases a mild chronic infection was established, but there was not the marked difference between the ability of the milk and of the culture to produce mastitis that was Observed with the nonhemolytic group.

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Details zur Ausgabe

• Verlag: Forgotten Books
• Erscheinungsdatum: 2015
• Sprache: Englisch
• ISBN 10: 1331945283
• ISBN 13: 9781331945284
• Einband: Taschenbuch
• Anzahl der Seiten: 680
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