Seroprevalence of porcine proliferative enteropathy among wild boars in the Republic of Korea

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.

Sero-prevalence of serological of Lawsonia intracellularis in domestic pigs in South Korea

“…As we focusing on the swine groups which have diarrhea, we could find out the fact that L. intracellularis is particularly important for diarrhea of sow groups. The present study, prevalence of L. intracellularis in pigs in South Korea showed highly positive rate and it is likely that the previous South Korea study [3] underestimated the overall prevalence economic impact of L. intracellularis.…”

“…The longest reported duration of serum antibodies against L. intracellularis in pigs was less than 2 months. In Korea, after the publications in 2014 [3], a few studies were focused on the antibody detection of L. intracellularis. This study aimed to investigate the presence of L. intracellularis by Elisa method and our findings demonstrate that the latest detection information would be greatly useful for future serological domestic farm monitoring.…”

Suidae and Tayassuidae

“…Proliferative enteritis Wild boar None described Serology and/or PCR (Tomanova et al, 2002;Dezorzova-Tomanova et al, 2006;Yeh et al, 2014) Leptospira interrogans (multiple serovars) Often subclinical; can cause sepsis, nephritis, hepatitis, meningitis, and abortion Peccaries, Wild boar None described Serology (Clark et al, 1983;Vale-Gonçalves et al, 2015;Zmudzki et al, 2016; Enterotoxigenic Escherichia coli(Shigatoxin and O157 strains)…”