Abstract
BackgroundThe importance of the wild boar as a reservoir of Lawsonia intracellularis was assessed by investigating the seroprevalence of this pathogen among wild boars in the Republic of Korea. The extent of exposure to L. intracellularis among wild boars (Sus scrofa coreanus) was monitored by a country-wide serological survey using an immunoperoxidase monolayer assay.ResultsIn this study, antibodies to L. intracellularis were observed in 165 of 716 clinically healthy wild boars tested. The overall apparent prevalence calculated directly from the sample and the true prevalence calculated based on the accuracy of the test method were 23.0% (95% confidence interval: 20.0-26.3%) and 25.6% (95% confidence interval: 23.9-27.2%), respectively. Serologically positive animals were found in all the tested provinces.ConclusionsOur results confirm that L. intracellularis is present in the wild boar population worldwide, even in Far East Asia. Despite the high seroprevalence shown in wild boars, further studies are warranted to evaluate their potential as a reservoir species because seroprevalence does not prove ongoing infection nor shedding of the bacteria in amounts sufficient to infect other animals. It should also be determined whether the wild boar, like the domestic pig, is a natural host of L. intracellularis.
Highlights
The importance of the wild boar as a reservoir of Lawsonia intracellularis was assessed by investigating the seroprevalence of this pathogen among wild boars in the Republic of Korea
A nationwide prevalence survey was carried out to determine the L. intracellularis seroprevalence and we report the serological prevalence of L. intracellularis infection in captive wild boars from fields and forests in the Republic of Korea (ROK)
In this study, 716 serum samples collected from clinically healthy wild boars in fields and forests were examined by immunoperoxidase monolayer assay (IPMA)
Summary
The extent of exposure to L. intracellularis among wild boars (Sus scrofa coreanus) was monitored by a country-wide serological survey using an immunoperoxidase monolayer assay. Tomanova et al reported that L. intracellularis was present in wild boars in the Czech Republic, using PCR analysis of intestinal tissues and/or serological examination in 2002 and 2006 [4,5], whereas. The aim of the present study was to assess the importance of the wild boar (Sus scrofa coreanus) population as a potential reservoir for L. intracellularis in the Republic of Korea (ROK). A nationwide prevalence survey was carried out to determine the L. intracellularis seroprevalence and we report the serological prevalence of L. intracellularis infection in captive wild boars from fields and forests in the ROK
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