Comparison of different assays for definition of heat-stable enterotoxigenicity of Escherichia coli porcine strains.

Journal of Clinical Microbiology
E Olsson, O Söderlind

Abstract

Ninety-one Escherichia coli strains isolated from porcine neonatal diarrhea, representing 28 O-groups and rough and non-O-groupable strains, were examined for enterotoxigenicity (heat stable [ST] or heat labile [LT]) by using bacterial suspensions in intestinal loop tests in 3- to 7-week-old piglets and culture supernatant fluids in the Y1 adrenal cell test, the 18-h rabbit intestinal loop test, and the infant mouse test. Eleven strains in O-groups 101, 138, 147, and 149 were positive in all four assay systems and were designated ST + LT. Fourteen strains within O-groups 8, 9, 20, 64, 141, and 149 and non-O-groupable were positive only in the 3- to 7-week-old piglet loop test and the infant mouse test and were designated ST pig + mouse. Sixteen strains distributed among O-groups 8, 16, 32, 50, 51, 98, 115, 141, 149, and 157 were positive only in the piglet intestinal loop test and were designated ST pig. Three strains of O-groups 8, 9, and 140 were positive only in the infant mouse assay and were designated ST mouse. Two strains of O-group 149 were positive in all tests except the infant mouse test and were designated LT. A total of 42 strains were negative in all four tests (Ent(-)), and 3 strains could not be categorized by t...Continue Reading

Citations

Dec 15, 1982·European Journal of Biochemistry·S AimotoT Miwatani
Oct 1, 1988·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·I LönnrothS Lange
Jan 1, 1984·Microbiology and Immunology·M ShimizuK Sakurai
Jan 1, 1985·Medical Microbiology and Immunology·I KühnR Möllby
Aug 1, 1988·Journal of Clinical Microbiology·C HandlJ I Flock
May 1, 1988·Journal of Clinical Microbiology·O SöderlindR Möllby
Feb 1, 1981·Journal of Clinical Microbiology·C J SmythI Orskov
Jan 1, 1981·Pharmacology & Therapeutics·R N Greenberg, R L Guerrant
May 1, 1984·Infection and Immunity·L A DreyfusD C Robertson
Sep 1, 1991·Antimicrobial Agents and Chemotherapy·C Jansson, O Sköld
Jun 28, 1985·The American Journal of Medicine·J R Cantey

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