Frequency distribution of the natural logarithm of I.suis oocysts per gram of faeces[ln(OPG + 1)]from pooled faecal samples of 314 litters in 55 herds. Faecal samples were collected from half of the piglets of each litter and then pooled, during their second week of life. OPG counts were determined by a modified McMaster technique.
Skampardonis et al. BMC Veterinary Research 2012 8:228 doi:10.1186/1746-6148-8-228