Abstract
Samples of ground beef (225), pork (235) and chicken (200) were randomly selected from meat processing plants in the southwestern Ontario area. Supernatants of broth cultures of the samples were tested for verocytotoxins using a Vero cell assay. Neutralization of cytotoxic activity using antisera specific for three types of verocytotoxin (Verotoxin 1, Verotoxin 2 and Shiga-like toxin II) was performed on positive samples. Isolation of verocytotoxigenic Escherichia coli (VTEC) was attempted from positive samples. VTEC were confirmed as E. coli biochemically, tested for drug resistance, and serotyped. Based on neutralization studies, the prevalence of VTEC in beef and pork was at least 36.4% and 10.6%, respectively. This is much higher than has been reported from a survey of retail meats in which a method designed to detect only E. coli O 157.H7 was used. Isolations of VTEC were made from 10.4% of the beef samples and 3.8% of the pork samples. No VTEC were recovered from the chicken samples. The majority of VTEC isolates were susceptible to commonly used antimicrobial agents. A number of the serotypes of the VTEC isolates recovered have been associated with human disease; however, no VTEC of serotype O 157.H7 were isolated.
Full text
PDF









Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Ashkenazi S., Cleary T. G. Rapid method to detect shiga toxin and shiga-like toxin I based on binding to globotriosyl ceramide (Gb3), their natural receptor. J Clin Microbiol. 1989 Jun;27(6):1145–1150. doi: 10.1128/jcm.27.6.1145-1150.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Borczyk A. A., Karmali M. A., Lior H., Duncan L. M. Bovine reservoir for verotoxin-producing Escherichia coli O157:H7. Lancet. 1987 Jan 10;1(8524):98–98. doi: 10.1016/s0140-6736(87)91928-3. [DOI] [PubMed] [Google Scholar]
- Clarke R. C., McEwen S. A., Gannon V. P., Lior H., Gyles C. L. Isolation of verocytotoxin-producing Escherichia coli from milk filters in south-western Ontario. Epidemiol Infect. 1989 Apr;102(2):253–260. doi: 10.1017/s0950268800029927. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Downes F. P., Barrett T. J., Green J. H., Aloisio C. H., Spika J. S., Strockbine N. A., Wachsmuth I. K. Affinity purification and characterization of Shiga-like toxin II and production of toxin-specific monoclonal antibodies. Infect Immun. 1988 Aug;56(8):1926–1933. doi: 10.1128/iai.56.8.1926-1933.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Downes F. P., Green J. H., Greene K., Strockbine N., Wells J. G., Wachsmuth I. K. Development and evaluation of enzyme-linked immunosorbent assays for detection of shiga-like toxin I and shiga-like toxin II. J Clin Microbiol. 1989 Jun;27(6):1292–1297. doi: 10.1128/jcm.27.6.1292-1297.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gannon V. P., Gyles C. L., Friendship R. W. Characteristics of verotoxigenic Escherichia coli from pigs. Can J Vet Res. 1988 Jul;52(3):331–337. [PMC free article] [PubMed] [Google Scholar]
- Head S. C., Karmali M. A., Roscoe M. E., Petric M., Strockbine N. A., Wachsmuth I. K. Serological differences between verocytotoxin 2 and shiga-like toxin II. Lancet. 1988 Sep 24;2(8613):751–751. doi: 10.1016/s0140-6736(88)90228-0. [DOI] [PubMed] [Google Scholar]
- Irwin R. J., McEwen S. A., Clarke R. C., Meek A. H. The prevalence of verocytotoxin-producing Escherichia coli and antimicrobial resistance patterns of nonverocytotoxin-producing Escherichia coli and Salmonella in Ontario broiler chickens. Can J Vet Res. 1989 Oct;53(4):411–418. [PMC free article] [PubMed] [Google Scholar]
- Johnson W. M., Lior H., Bezanson G. S. Cytotoxic Escherichia coli O157:H7 associated with haemorrhagic colitis in Canada. Lancet. 1983 Jan 1;1(8314-5):76–76. doi: 10.1016/s0140-6736(83)91616-1. [DOI] [PubMed] [Google Scholar]
- Karch H., Meyer T. Evaluation of oligonucleotide probes for identification of shiga-like-toxin-producing Escherichia coli. J Clin Microbiol. 1989 Jun;27(6):1180–1186. doi: 10.1128/jcm.27.6.1180-1186.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Karmali M. A. Infection by verocytotoxin-producing Escherichia coli. Clin Microbiol Rev. 1989 Jan;2(1):15–38. doi: 10.1128/cmr.2.1.15. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Karmali M. A., Petric M., Lim C., Fleming P. C., Arbus G. S., Lior H. The association between idiopathic hemolytic uremic syndrome and infection by verotoxin-producing Escherichia coli. J Infect Dis. 1985 May;151(5):775–782. doi: 10.1093/infdis/151.5.775. [DOI] [PubMed] [Google Scholar]
- Kashiwazaki M., Ogawa T., Nakamura K., Isayama Y., Tamura K., Sakazaki R. Vero cytotoxin produced by Escherichia coli strains of animal origin. Natl Inst Anim Health Q (Tokyo) 1981 Summer;21(2):68–72. [PubMed] [Google Scholar]
- Konowalchuk J., Speirs J. I., Stavric S. Vero response to a cytotoxin of Escherichia coli. Infect Immun. 1977 Dec;18(3):775–779. doi: 10.1128/iai.18.3.775-779.1977. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Levine M. M., Xu J. G., Kaper J. B., Lior H., Prado V., Tall B., Nataro J., Karch H., Wachsmuth K. A DNA probe to identify enterohemorrhagic Escherichia coli of O157:H7 and other serotypes that cause hemorrhagic colitis and hemolytic uremic syndrome. J Infect Dis. 1987 Jul;156(1):175–182. doi: 10.1093/infdis/156.1.175. [DOI] [PubMed] [Google Scholar]
- Linggood M. A., Thompson J. M. Verotoxin production among porcine strains of Escherichia coli and its association with oedema disease. J Med Microbiol. 1987 Dec;24(4):359–362. doi: 10.1099/00222615-24-4-359. [DOI] [PubMed] [Google Scholar]
- Lior H., Borczyk A. A. False positive identifications of Escherichia coli O157. Lancet. 1987 Feb 7;1(8528):333–333. doi: 10.1016/s0140-6736(87)92065-4. [DOI] [PubMed] [Google Scholar]
- Mainil J. G., Duchesnes C. J., Whipp S. C., Marques L. R., O'Brien A. D., Casey T. A., Moon H. W. Shiga-like toxin production and attaching effacing activity of Escherichia coli associated with calf diarrhea. Am J Vet Res. 1987 May;48(5):743–748. [PubMed] [Google Scholar]
- Marques L. R., Moore M. A., Wells J. G., Wachsmuth I. K., O'Brien A. D. Production of Shiga-like toxin by Escherichia coli. J Infect Dis. 1986 Aug;154(2):338–341. doi: 10.1093/infdis/154.2.338. [DOI] [PubMed] [Google Scholar]
- Newland J. W., Neill R. J. DNA probes for Shiga-like toxins I and II and for toxin-converting bacteriophages. J Clin Microbiol. 1988 Jul;26(7):1292–1297. doi: 10.1128/jcm.26.7.1292-1297.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
- O'Brien A. D., LaVeck G. D., Thompson M. R., Formal S. B. Production of Shigella dysenteriae type 1-like cytotoxin by Escherichia coli. J Infect Dis. 1982 Dec;146(6):763–769. doi: 10.1093/infdis/146.6.763. [DOI] [PubMed] [Google Scholar]
- O'Brien A. O., Lively T. A., Chen M. E., Rothman S. W., Formal S. B. Escherichia coli O157:H7 strains associated with haemorrhagic colitis in the United States produce a Shigella dysenteriae 1 (SHIGA) like cytotoxin. Lancet. 1983 Mar 26;1(8326 Pt 1):702–702. doi: 10.1016/s0140-6736(83)91987-6. [DOI] [PubMed] [Google Scholar]
- Scotland S. M., Rowe B., Smith H. R., Willshaw G. A., Gross R. J. Vero cytotoxin-producing strains of Escherichia coli from children with haemolytic uraemic syndrome and their detection by specific DNA probes. J Med Microbiol. 1988 Apr;25(4):237–243. doi: 10.1099/00222615-25-4-237. [DOI] [PubMed] [Google Scholar]
- Sherwood D., Snodgrass D. R., O'Brien A. D. Shiga-like toxin production from Escherichia coli associated with calf diarrhoea. Vet Rec. 1985 Feb 23;116(8):217–218. doi: 10.1136/vr.116.8.217. [DOI] [PubMed] [Google Scholar]
- Smith H. R., Scotland S. M., Willshaw G. A., Wray C., McLaren I. M., Cheasty T., Rowe B. Vero cytotoxin production and presence of VT genes in Escherichia coli strains of animal origin. J Gen Microbiol. 1988 Mar;134(3):829–834. doi: 10.1099/00221287-134-3-829. [DOI] [PubMed] [Google Scholar]
- Strockbine N. A., Marques L. R., Holmes R. K., O'Brien A. D. Characterization of monoclonal antibodies against Shiga-like toxin from Escherichia coli. Infect Immun. 1985 Dec;50(3):695–700. doi: 10.1128/iai.50.3.695-700.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Strockbine N. A., Marques L. R., Newland J. W., Smith H. W., Holmes R. K., O'Brien A. D. Two toxin-converting phages from Escherichia coli O157:H7 strain 933 encode antigenically distinct toxins with similar biologic activities. Infect Immun. 1986 Jul;53(1):135–140. doi: 10.1128/iai.53.1.135-140.1986. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Todd E. C., Szabo R. A., Peterkin P., Sharpe A. N., Parrington L., Bundle D., Gidney M. A., Perry M. B. Rapid hydrophobic grid membrane filter-enzyme-labeled antibody procedure for identification and enumeration of Escherichia coli O157 in foods. Appl Environ Microbiol. 1988 Oct;54(10):2536–2540. doi: 10.1128/aem.54.10.2536-2540.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wade W. G., Thom B. T., Evans N. Cytotoxic enteropathogenic Escherichia coli. Lancet. 1979 Dec 8;2(8154):1235–1236. doi: 10.1016/s0140-6736(79)92349-3. [DOI] [PubMed] [Google Scholar]
