Salmonella Dublin infection in Queensland dairy cattle

Trueman, K. F.; Thomas, R. L.; Mackenzie, A.; Eaves, L. E.; Duffy, P F

doi:10.1111/j.1751-0813.1996.tb15447.x

Cited by 13 publications

(7 citation statements)

References 15 publications

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“…Dublin, Abortusovis, Choleraesuis, and Typhimurium) able to produce systemic infection in these animals might have developed specific mechanisms to take advantage of both the intestinal and the pulmonary route of entry and dissemination. It is worth noting that salmonella infection of these hosts is often characterized by pneumonia and that bovine-adapted Dublin may cause pneumonia as a major sign of infection in sheep [110,124,197,198]. Experimental infections of lambs challenged intravenously further support this hypothesis, since Dublin, Abortusovis, and Choleraesuis, but not Gallinarum, infected the lungs significantly more than the liver, suggesting convergence of adaptation for the first three serotypes toward the lung lymphoid tissues (Uzzau and colleagues, unpublished results).…”

Section: Dissemination Routementioning

confidence: 99%

Host adapted serotypes of Salmonella enterica

et al. 2000

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Salmonella constitutes a genus of zoonotic bacteria of worldwide economic and health importance. The current view of salmonella taxonomy assigns the members of this genus to two species: S. enterica and S. bongori. S. enterica itself is divided into six subspecies, enterica, salamae, arizonae, diarizonae, indica, and houtenae, also known as subspecies I, II, IIIa, IIIb, IV, and VI, respectively [1]. Members of Salmonella enterica subspecies enterica are mainly associated with warm-blooded vertebrates and are usually transmitted by ingestion of food or water contaminated by infected faeces. The pathogenicity of most of the distinct serotypes remains undefined, and even within the most common serotypes, many questions remain to be answered regarding the interactions between the organism and the infected host.Salmonellosis manifests itself in three major forms: enteritis, septicaemia, and abortion, each of which may be present singly or in combination, depending on both the serotype and the host involved. Although currently over 2300 serovars of Salmonella are recognized, only about 50 serotypes are isolated in any significant numbers as human or animal pathogens [2, 3] and they all belong to subspecies enterica. Of these, most cause acute gastroenteritis characterized by a short incubation period and a severe systemic disease in man or animals, characterized by septicaemia, fever and/or abortion, and such serotypes are often associated with one or few host species [4–6].It is the intention of this review to present a summary of current knowledge of these host-adapted serotypes of S. enterica. The taxonomic relationships between the serotypes will be discussed together with a comparison of the pathology and pathogenesis of the disease that they cause in their natural host(s). Since much of our knowledge on salmonellosis is based on the results of work on Typhimurium, this serotype will often be used as the baseline in discussion. It is hoped that an appreciation of the differences that exist in the way these serotypes interact with the host will lead to a greater understanding of the complex host–parasite relationship that characterizes salmonella infections.

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Section: Dissemination Routementioning

confidence: 99%

Host adapted serotypes of Salmonella enterica

et al. 2000

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“…Consistent with this hypothesis, transcontinental dissemination of a bovine host-specific bovine Salmonella serovar, Dublin, occurred at a far slower pace. 27,28 In contrast, multi-resistant strains of the human hostspecific Salmonella Typhi have disseminated rapidly and globally, much like mr-DT104. 10 The importance of human travel as a vehicle for global dissemination of Salmonella strains may have been underestimated.…”

mentioning

confidence: 99%

Multiresistant clones of Salmonella enterica: The importance of dissemination

Davis

Hancock

Besser

2002

Journal of Laboratory and Clinical Medicine

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“…Results of long-term follow-up of a complete milking herd of Salmonella-infected cows has rarely been reported in the literature. In some S. Dublin studies, similar data are available [31], but most of these studies deal with short-term outbreaks often reporting only cross-sectional data [32,33]. The herd behaviour of S. Cerro that we observed in this case study indicates that this organism is very well adapted to the dairy cow environment.…”

Section: Discussionmentioning

confidence: 62%

“…In some S . Dublin studies, similar data are available [31], but most of these studies deal with short-term outbreaks often reporting only cross-sectional data [32, 33]. The herd behaviour of S .…”

Section: Discussionmentioning

confidence: 99%

A mathematical model of the dynamics of Salmonella Cerro infection in a US dairy herd

et al. 2007

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We developed a mathematical model of the transmission dynamics of salmonella to describe an outbreak of S. Cerro infection that occurred in a Pennsylvania dairy herd. The data were collected as part of a cooperative research project between the Regional Dairy Quality Management Alliance and the Agricultural Research Service. After the initial detection of a high prevalence of S. Cerro infection in the herd, a frequent and intensive sampling was conducted and the outbreak was followed for 1 year. The data showed a persistent presence of S. Cerro with a high prevalence of infection in the herd. The dynamics of host and pathogen were modelled using a set of nonlinear differential equations. A more realistically distributed (gamma-distributed) infectious period using multiple stages of infection was considered. The basic reproduction number was calculated and relevance to the intervention strategies is discussed.

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Salmonella Dublin infection in Queensland dairy cattle

Abstract: There has been a marked increase in S Dublin outbreaks in Queensland dairy cattle since 1983. Introduction of S Dublin carrier and aborting dairy heifers from southern Australia, where S Dublin is not uncommon, was associated with the initial outbreaks.

Cited by 13 publications

References 15 publications

Host adapted serotypes of Salmonella enterica

Host adapted serotypes of Salmonella enterica

Multiresistant clones of Salmonella enterica: The importance of dissemination

A mathematical model of the dynamics of Salmonella Cerro infection in a US dairy herd

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