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Table 1 Overview of peer reviewed prevalence studies performed in Europe since the year 2000

From: Prevalence of Lawsonia intracellularis in pig herds in different European countries

CountryAge categories of sampled animalsDiagnostic material and methodHerd-Prevalence (%)Within-herd-Prevalence (%)Source
DenmarkGP, FPFaeces: PCR93.725[9]
FranceNP, GP, FP, SBlood: IFA88 [10]
GermanyNP, GP, FP, SFaeces: PCR30*
14**
19.4*
7.3**
[11]
GermanyNP, GP; FP, S, BBlood: IFAT81.343.2[12]
GermanySP,
NP
Faeces: nPCR
Blood: ELISA
6.7
39.2
0.7
5.2
[13]
Great BritainNP, GP, FPBlood: IFA93.1 [14]
Republic of IrelandNP, GP, FPBlood: IFA92.9 [14]
SpainNP, GP, FP, SBlood: IFA68.96 [10]
SwedenGPFaeces and rectal swabs: nPCR47.627.1[15]
  1. A herd was defined positive, if at least one sample was positive for L. intracellularis (herd- prevalence). The within- herd prevalence is the number of samples positive per analysed samples per herd within all herds per country. Age categories were classified as follows: Suckling pigs (SP) = before weaning, Nursery pigs (NP) = weaner till ~ 25 kg, Growing pigs (GP) = ~ 25- 40 kg, Finishing pigs (FP) = ~ 40 kg till slaughter, Sows (S), Boars (B)
  2. Diagnostic methods: Enzyme linked immunosorbent essay (ELISA), indirect Immunofluorescence assay (IFA), indirect Immunofluorescence antibody test (IFAT), Polymerase chain reaction (PCR), nested PCR (nPCR)
  3. * = animals with diarrhoea; ** = animals without diarrhoea