1967
DOI: 10.1099/00221287-46-1-125
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Effect of Food Intake on Growth and Survival of Salmonellas and Escherichia coli in the Bovine Rumen

Abstract: S U M M A R YWhen salmonella organisms were put into the rumen of cattle their subsequent growth or elimination depended on the dietary intake before and after the organisms were ingested. When the animals were receiving a regular daily ration of 6.8 kg. lucerne hay the organisms were rapidly eliminated from the rumen and viable organisms in the faeces were rarely detected. Decreasing the daily food intake to 2-3 kg. or interruption of feeding for one or more days retarded the elimination of salmonellas and Es… Show more

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Cited by 124 publications
(64 citation statements)
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“…However, starvation for less than 48 h altered the ruminal environment so that, for about 10 h after the host animal was re-fed, it no longer exerted an inhibitory effect on the growth of inoculated E. coli or salmonellas. A similar effect was found previously in sheep (Grau, Brownlie and Smith, 1969) and in cattle (Brownlie and Grau, 1967). The inoculated E. coli and prospective salmonella recipients were then able to multiply, reaching large enough numbers for the R factor to be transferred.…”
Section: Discussionsupporting
confidence: 68%
“…However, starvation for less than 48 h altered the ruminal environment so that, for about 10 h after the host animal was re-fed, it no longer exerted an inhibitory effect on the growth of inoculated E. coli or salmonellas. A similar effect was found previously in sheep (Grau, Brownlie and Smith, 1969) and in cattle (Brownlie and Grau, 1967). The inoculated E. coli and prospective salmonella recipients were then able to multiply, reaching large enough numbers for the R factor to be transferred.…”
Section: Discussionsupporting
confidence: 68%
“…As Brownlie & Grau 103 found with Salmonella, the withdrawal of feed for 6 to 48 h leads to an increase in E. coli numbers 104,105 . The mechanisms by which normal rumen bacteria control pathogens may be related to toxicity of VFA, especially at acid pH levels 106 .…”
Section: Enteropathogenic Bacteriamentioning
confidence: 93%
“…Salmonella spp., when introduced into the rumen of cattle fed at above maintenance level on lucerne hay, were rapidly eliminated from the rumen and few viable cells appeared in the faeces. However, when feed supply was reduced or interrupted for 1 or more days, the capacity of the animal to control the pathogens was greatly reduced 103 . Fasting permitted the establishment of Salmonella in the intestine.…”
Section: Enteropathogenic Bacteriamentioning
confidence: 99%
“…Emptying of the GIT content represents one of the more drastic alterations that occurs either naturally or as part of a prescribed treatment in humans or a management option in animals. Increased populations of Salmonella have been consistently observed in a variety of animals undergoing emptying of the GIT due to feed removal, including chickens (377-381), mice (382), and ruminants (383)(384)(385). Although the indigenous GIT microflora were not characterized in these early studies, it was speculated that feed removal/GIT emptying potentially influenced the microbial populations or activities, and susceptibility to Salmonella colonization was presumed to be related to decreases in levels of antimicrobial organic acids generated during fermentation (250).…”
Section: Salmonella Virulence Response and Competition With Git Micromentioning
confidence: 99%