By employing Koch's postulates, certain strains of Escherichia coli have been proven to cause enteritis of early weaned pigs. 1. Two strains of hemolytic E. coli were isolated consistently and in large numbers from the fecal samples of early weaned pigs that scoured shortly after weaning. 2. Symptoms of enteritis were reproduced artificially by contaminating the drinking water of the pigs with a live culture of one of the two strains of E. coli. The same strain of E. coli was isolated in very large numbers from the fecal samples of artificially infected animals. 4. The infection of this strain of E. coli was transmitted naturally by housing susceptible animals with the scouring animals. A hypothesis is put forward that certain strains of E. coli occur frequently as part of the normal intestinal microflora of swine and behave as typical infectious agents when suitable conditions for their growth are provided.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.115386 |
| Date | January 1964 |
| Creators | Chopra, Shivdarshan. L. |
| Contributors | Blackwood, A. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy. (Department of Agriculture.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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