|Application:||Gene expression microarray analysis|
|Number of samples:||47|
|Release date:||Jun 20 2012|
|Last update date:||May 3 2013|
|Dataset link||Time course of the transcriptional response of three porcine intestinal sections to Salmonella typhimurium infection|
Sixteen male and female crossbreeds weaned piglets, approximately 4 weeks of age, were used in this study. Before infection, faecal samples from each animal were analyzed to confirm that piglets were free of Salmonella. Pigs were housed in an environmentally controlled isolation facility at 25ºC and under constant light with ad libitum access to feed and water. After an acclimation period of 5 days, pigs were challenged orally with 108 cfu of Salmonella enterica serovar Typhimurium phagetype DT104 (n=12), whereas the control group (n=4) received sterile medium orally. The four non-infected control pigs were necropsied two hours prior to experimental infection. Four randomly chosen infected pigs were necropsied at 1 day post infection (dpi), 2 dpi and 6 dpi, respectively. Faecal swabs, blood and tissues samples were aseptically collected. Ileum was collected, sectioned in pieces of around 10 cm and immediately frozen in liquid nitrogen for mucosa isolation and RNA purification. To ensure the inoculated pigs were infected, faecal samples were cultured and checked for positive Salmonellae organism Four reps per treatment and tissue group except 'Ileum 1dpi' has only 3 replicates.