A study of relationships among F17 a producing enterotoxigenic and non-enterotoxigenic Escherichia coli strains isolated from diarrheic calves.
We investigated the clonal relationships among 41 enterotoxigenic (ETEC) or non-enterotoxigenic (NETEC) Escherichia coli strains producing the F17 a fimbriae isolated from diarrheic calves in France or Belgium in the early 1980s. Twenty-three of the 26 ETEC strains were highly clonally related, most of them with a O101:K32:H9-serotype. The NETEC strains were also divided in clonal subgroups, most of them with O101:H-serotype. The F17 a positive ETEC strains are no longer isolated from diarrheic calves in these countries. It is postulated that the use of a vaccine including O101, K32 and H9 antigens in addition to K99 (F5) explains the strongly reduced isolation of the O101:K32:H9, K99 (F5) E. coli clone.
Contrepois
M
M
INRA, Laboratoire de Microbiologie, Centre de Recherches de Clermont-Ferrand-Theix, Saint-Genès-Champanelle, France. contrep@clermont.inra.fr
Bertin
Y
Y
Pohl
P
P
Picard
B
B
Girardeau
J P
JP
D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000032:analysis; D001530:Belgium; D050260:Carbohydrate Metabolism; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D003967:Diarrhea / Q000382:microbiology / Q000662:veterinary*; D004591:Electrophoresis, Polyacrylamide Gel / Q000662:veterinary; D004768:Enterotoxins / Q000096:biosynthesis*; D004926:Escherichia coli / Q000145:classification / Q000201:enzymology / Q000378:metabolism*; D004927:Escherichia coli Infections / Q000382:microbiology / Q000662:veterinary*; D004950:Esterases / Q000032:analysis; D010861:Fimbriae, Bacterial / Q000145:classification; D005602:France; D016133:Polymerase Chain Reaction / Q000662:veterinary; D012703:Serotyping
D001425:Bacterial Outer Membrane Proteins; D004768:Enterotoxins; D004950:Esterases