Taken before and 16 h after the intramammary challenge. Data from cows 1419, 1490 and 1592 were used in the analyses. Bars represent the means ± SEM for two independent samples. The asterisk denotes significant expression difference (1 way ANOVA, P < 0.01) compared with the corresponding post-infection control sample for each cow. No PTX3 expression could be detected in milk from the intra-animal control udders or in the pre-infection samples.Copyright information:Taken from "Identification of immune genes and proteins involved in the response of bovine mammary tissue to infection"http://www.biomedcentral.com/1746-6148/4/18BMC Veterinary Research 2008;4():18-18.Published online 2 Jun 2008PMCID:PMC2430192.