Oral immunisation of wild boar against classical swine fever in Baden-Württemberg: development of the seroprevalences based on the hunting bag

Kaden, Volker; Hänel, A.; Renner, Christiane; Gossger, Klaus

doi:10.1007/s10344-005-0083-2

Cited by 30 publications

(32 citation statements)

References 6 publications

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“…Although the immunity in wild boar could be improved after introduction of the triple or double vaccination against CSF (Kaden et al 2002(Kaden et al , 2003a(Kaden et al , 2005a, the percentage of seropositive young wild boar is still relatively low, especially the proportion of seropositive gruntlings (animals ≤6 months of age). To improve the proportion of immunised gruntlings, there are theoretically two ways: (1) introduction of a prolonged maternal protection, and (2) bait uptake at an earlier age.…”

Section: Discussionmentioning

confidence: 99%

Oral immunisation of wild boar against classical swine fever: uptake studies of new baits and investigations on the stability of lyophilised C-strain vaccine

2006

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The aim of this study was to investigate the uptake of new spherical and cuboid baits by wild boar and domestic pigs and to evaluate the stability of lyophilised C-strain vaccine stored at different environmental temperatures. New baits were designed to improve the consumption of the vaccine against classical swine fever by young wild boar. Our uptake studies showed that neither wild boar nor domestic pigs at the age of 2 months picked up the baits at all. Although the animals began to pick up the baits incompletely at the age of 3 months, a complete uptake of both the new baits and the older ones was only observed from the age of 4 (domestic pigs) and 4.5 (wild boar) months on. Nevertheless, the larger spherical baits with a diameter of 3 cm were taken up more effectively than the recent vaccine baits. As expected, lyophilised vaccine showed a higher stability than liquid vaccine, especially at temperatures ≥24°C. Independently of the stabiliser (GS4 or TSM) used, there are no differences between the virus titres detected within a storage period of 7 days. As the lyophilised C-strain vaccine was more stable at higher temperatures than the liquid vaccine formulation, we recommend to use lyophilised vaccine for oral immunisation of wild boar in the future, as oral vaccination is also carried out in the summertime.

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Section: Discussionmentioning

confidence: 99%

Oral immunisation of wild boar against classical swine fever: uptake studies of new baits and investigations on the stability of lyophilised C-strain vaccine

2006

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“…Eurasian wild boar (Sus scrofa) are key wildlife reservoir hosts for diseases affecting livestock, such as classical swine fever (Kaden et al 2005), and Aujeszky's disease , as well as for several zoonotic diseases including bovine tuberculosis (bTB; Naranjo et al 2008). The total eradication of a disease is very difficult if a wildlife host is able to serve as a natural reservoir of the pathogen .…”

Section: Introductionmentioning

confidence: 99%

Specificity and success of oral-bait delivery to Eurasian wild boar in Mediterranean woodland habitats

et al. 2010

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Eurasian wild boar (Sus scrofa) is an important reservoir host for pathogens affecting humans and domestic animals. The eradication of these diseases may require the development of control strategies that reduce pathogen transmission between wildlife and domestic animals. Baiting for oral vaccine delivery is often considered for wildlife disease control. The effective and efficient field vaccination of wildlife requires species-specific baits as delivery vehicles for oral vaccines and designing appropriate baiting strategies. The objective of this study was to determine the proportion of young and adult wild boar and non-target animals that consumed baits containing a chemical marker, iophenoxic acid (IPA), in delivery trials conducted in summer in four different sites in the Mediterranean region of Spain where wild boar are abundant. The proportion of wild boar showing IPA markers in serum in autumn ranged from 11.5% to 56.4%. When attending to age classes, 12.6% to 72.7% of young individuals presented IPA. The results evidenced that the percent of wild boar that ingested the baits varied among study sites and age classes. Placing baits inside selective cages (for juveniles) and under heavy pavel stones (for adults) contributed to improve age specificity in bait consumption. We suggest ways for improving the age specificity of bait delivery systems used for young and adult wild boar.

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“…As part of the eradication strategy, attempts were made to vaccinate the wild boar population through oral immunisation (Kaden et al, 2005). Vaccination was performed by a suspension in a bait of corn, which was manually distributed in the selected areas using a density of 30-40 baits/ km 2 .…”

Section: Application To the Csfv Datamentioning

confidence: 99%

Additive‐Multiplicative Regression Models for Spatio‐Temporal Epidemics

Höhle

2009

Biometrical J

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An extension of the stochastic susceptible-infectious-recovered (SIR) model is proposed in order to accommodate a regression context for modelling infectious disease data. The proposal is based on a multivariate counting process specified by conditional intensities, which contain an additive epidemic component and a multiplicative endemic component. This allows the analysis of endemic infectious diseases by quantifying risk factors for infection by external sources in addition to infective contacts. Inference can be performed by considering the full likelihood of the stochastic process with additional parameter restrictions to ensure non-negative conditional intensities. Simulation from the model can be performed by Ogata's modified thinning algorithm. As an illustrative example, we analyse data provided by the Federal Research Centre for Virus Diseases of Animals, Wusterhausen, Germany, on the incidence of the classical swine fever virus in Germany during 1993-2004.

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Oral immunisation of wild boar against classical swine fever in Baden-Württemberg: development of the seroprevalences based on the hunting bag

Cited by 30 publications

References 6 publications

Oral immunisation of wild boar against classical swine fever: uptake studies of new baits and investigations on the stability of lyophilised C-strain vaccine

Oral immunisation of wild boar against classical swine fever: uptake studies of new baits and investigations on the stability of lyophilised C-strain vaccine

Specificity and success of oral-bait delivery to Eurasian wild boar in Mediterranean woodland habitats

Additive‐Multiplicative Regression Models for Spatio‐Temporal Epidemics

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