Salmonella enterica var Typhimurium and Salmonella enterica var Enteritidis express type 1 fimbriae in the rat in vivo.
In a series of experiments rats were dosed with purified type 1 fimbriae from Salmonella enterica var Enteritidis or with fimbriated cultures of either S. enterica var Typhimurium or S. enterica var Enteritidis. Paraffin-wax embedded histological sections of jejunal and ileal tissue were taken and stained by the streptavidin biotin complex (sABC) staining technique for the detection of salmonella and type 1 fimbriae. On oral infection with Enteritidis and Typhimurium both bacteria were shown to be closely associated with the rat ileal epithelium and expressed type 1 fimbriae, thus clearly demonstrating that type 1 fimbriae are expressed by salmonellae in vivo. Moreover, association with the ileum was also shown to occur when purified type 1 fimbriae were orally administered to rats. Our results suggest that type 1 fimbriae alone or in combination with other fimbriae may play an important role in the early stages of infection with these pathogenic bacteria.
Ewen
S W
SW
Department of Pathology, Medical School, University of Aberdeen, UK.
Naughton
P J
PJ
Grant
G
G
Sojka
M
M
Allen-Vercoe
E
E
Bardocz
S
S
Thorns
C J
CJ
Pusztai
A
A
D000818:Animals; D010861:Fimbriae, Bacterial / Q000378:metabolism*; D008297:Male; D011817:Rabbits; D051381:Rats; D012477:Salmonella enteritidis / Q000378:metabolism*; D012486:Salmonella typhimurium / Q000378:metabolism*