Spirochetes as the etiological factor in certain specific necroses and hyperplastic
      formations in swine

Howarth, J

Spirochetes as the etiological factor in certain specific necroses and hyperplastic formations in swine

Author

J. A. Howarth

Author Affiliations

J. A. Howarth was Associate in Veterinary Science.

Publication Information

Hilgardia 4(13):395-413. DOI:10.3733/hilg.v04n13p395. March 1930.

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Abstract

Abstract does not appear. First page follows.

The high percentage of young swine on the Pacific Coast of the United States affected with rhinohyperplasia2 and scirrhous cord (neoplastic formations in the scortum following castration) has been the incentive for some investigations, which are herewith reported.

Published observations concerning a form of rhinitis in swine called ‘snuffling sickness’ appeared in the German veterinary literature as early as 1860. Haubold,⁽¹⁾ Harms,⁽²⁾ Wulff,⁽³⁾ and Ostertag,⁽⁴⁾ considered the cause to be a rachitic swelling of the ethmoid and sphenoid bones. According to Schell,⁽⁵⁾ sarcomatous growths produced the symptoms, while Haubner⁽⁶⁾ considered it a form of tuberculosis, and Damman⁽⁷⁾ believed some cases to be caused by actinomyces, and others by abnormal development of the nasal bones. Schneider⁽⁸⁾ reported a form of ‘snuffles’ caused by the rudimentary development and curvature of the turbinated and ethmoid bones leading, in some cases, to a bloody purulent nasal discharge. Iminger,⁽⁹⁾ after observing a large number of cases, decided that the disease was infectious. He reported cases in which the cerebral tissues were involved.

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