Table 1.
Overview of peer reviewed prevalence studies performed in Europe since the year 2000
| Country | Age categories of sampled animals | Diagnostic material and method | Herd-Prevalence (%) | Within-herd-Prevalence (%) | Source |
|---|---|---|---|---|---|
| Denmark | GP, FP | Faeces: PCR | 93.7 | 25 | [9] |
| France | NP, GP, FP, S | Blood: IFA | 88 | [10] | |
| Germany | NP, GP, FP, S | Faeces: PCR |
30* 14** |
19.4* 7.3** |
[11] |
| Germany | NP, GP; FP, S, B | Blood: IFAT | 81.3 | 43.2 | [12] |
| Germany |
SP, NP |
Faeces: nPCR Blood: ELISA |
6.7 39.2 |
0.7 5.2 |
[13] |
| Great Britain | NP, GP, FP | Blood: IFA | 93.1 | [14] | |
| Republic of Ireland | NP, GP, FP | Blood: IFA | 92.9 | [14] | |
| Spain | NP, GP, FP, S | Blood: IFA | 68.96 | [10] | |
| Sweden | GP | Faeces and rectal swabs: nPCR | 47.6 | 27.1 | [15] |
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)
Diagnostic methods: Enzyme linked immunosorbent essay (ELISA), indirect Immunofluorescence assay (IFA), indirect Immunofluorescence antibody test (IFAT), Polymerase chain reaction (PCR), nested PCR (nPCR)
* = animals with diarrhoea; ** = animals without diarrhoea