Correction to: BMC Vet Res (2019) 15:241

https://doi.org/10.1186/s12917-019-1988-4

The original article [1] contained an error whereby the captions to Figs. 2 and 3 were mistakenly inverted; this has now been corrected.

Furthermore, this error was mistakenly introduced by the production team handling the manuscript and thus, was not the fault of the authors.