Journal article
Early pathogenesis in porcine proliferative enteropathy caused by Lawsonia intracellularis
Section of Fish Diseases, Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Technical University of Denmark1
Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Technical University of Denmark2
National Veterinary Institute, Technical University of Denmark3
Microbial Ecology, Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark4
Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark5
University of Copenhagen6
Section for Veterinary Diagnostics, Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark7
The intestinal bacterium Lawsonia intracellularis, the cause of proliferative enteropathy (PE) in pigs, is believed to infect mitotically active epithelial cells of the intestinal crypts and then multiply and spread in these cells as they divide. Further spread of infection is thought to occur by shedding of bacteria from infected crypts followed by infection of new crypts.
The early stages of the pathogenesis of PE, from 0 to 48 hours post-infection (hpi), have not been studied in vivo. In the present study pigs were inoculated with L. intracellularis and killed from 12 hpi to 5 days post-infection (dpi). The localization of L. intracellularis was determined immunohistochemically and by fluorescence in-situ hybridization.
At 12 hpi L. intracellularis was found within epithelial cells at the tips of villi, indicating infection of a range of epithelial cells including mature differentiated enterocytes. Furthermore, early invasion of the intestinal connective tissue was observed; with the presence of single bacteria in the lamina propria 12 hpi, and with a further spread of bacteria in the lamina propria observed at 5 dpi, suggesting an active role for the lamina propria in the course of infection.
Language: | English |
---|---|
Year: | 2010 |
Pages: | 101-109 |
ISSN: | 15323129 and 00219975 |
Types: | Journal article |
DOI: | 10.1016/j.jcpa.2010.01.006 |
ORCIDs: | 0000-0003-1653-4552 , Jensen, Tim Kåre and Boye, Mette |
Infection trial Lawsonia intracellularis Pathogenesis Pig Porcine proliferative enteropathy
Animals Bacterial Load Desulfovibrionaceae Infections Enterocytes Immunohistochemistry In Situ Hybridization, Fluorescence Intestinal Diseases Intestinal Mucosa Intestine, Small Lawsonia Bacteria Mucous Membrane Swine Swine Diseases Time Factors infection trial pathogenesis pig porcine proliferative enteropathy