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. 1988 Mar;26(3):524–529. doi: 10.1128/jcm.26.3.524-529.1988

Virulence factors of lactose-negative Escherichia coli strains isolated from children with diarrhea in Somalia.

M Nicoletti 1, F Superti 1, C Conti 1, A Calconi 1, C Zagaglia 1
PMCID: PMC266325  PMID: 3281977

Abstract

Lactose-negative Escherichia coli strains were isolated at high frequency from children with diarrhea in Somalia during a 2-year study on diarrheal diseases. Sixty-four of these strains, considered to be a representative sample, were characterized for virulence factors, plasmid profiles, and antibiotic resistance. Of these strains, 5 were recognized as enteroinvasive E. coli (they were serotyped as O135:K-:H-), 6 belonged to classical enteropathogenic E. coli serotypes, 9 were able to adhere to tissue culture cells (of these, 4 showed a pattern of localized adherence and 1 was an enteropathogenic strain), 18 were both adherent and hemolytic, and 8 were simply hemolytic. None hybridized with 32P-labeled heat-labile or heat-stable (a and b) enterotoxin gene probes or produced moderate or high-level cytotoxic effects on HeLa cells. Of the 64 strains examined, 24 produced mannose-resistant hemagglutination with human, chicken, and monkey erythrocytes. One of these was serotyped as O4:K-:H8, and a rabbit O antiserum raised against this strain allowed us to establish that 23 strains had the same O antigen. The 23 O4 strains were hemolytic and were not enterotoxic for rabbit ileal loops, and intact bacteria were able to destroy tissue culture cell monolayers very rapidly. The uniformity of the antibiotic resistance pattern and of the plasmid DNA content, together with the fact that they were isolated in different years and in different children, suggests that the O4 strains must be epidemiologically relevant in Somalia. A possible diarrheagenic role for the adherent-hemolytic E. coli strains is also discussed.

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Selected References

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  1. Atkin C. L., Neilands J. B., Phaff H. J. Rhodotorulic acid from species of Leucosporidium, Rhodosporidium, Rhodotorula, Sporidiobolus, and Sporobolomyces, and a new alanine-containing ferrichrome from Cryptococcus melibiosum. J Bacteriol. 1970 Sep;103(3):722–733. doi: 10.1128/jb.103.3.722-733.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Baldini M. M., Nataro J. P., Kaper J. B. Localization of a determinant for HEp-2 adherence by enteropathogenic Escherichia coli. Infect Immun. 1986 Apr;52(1):334–336. doi: 10.1128/iai.52.1.334-336.1986. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Bauer A. W., Kirby W. M., Sherris J. C., Turck M. Antibiotic susceptibility testing by a standardized single disk method. Am J Clin Pathol. 1966 Apr;45(4):493–496. [PubMed] [Google Scholar]
  4. Bhakdi S., Mackman N., Nicaud J. M., Holland I. B. Escherichia coli hemolysin may damage target cell membranes by generating transmembrane pores. Infect Immun. 1986 Apr;52(1):63–69. doi: 10.1128/iai.52.1.63-69.1986. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Black R. E., Merson M. H., Rahman A. S., Yunus M., Alim A. R., Huq I., Yolken R. H., Curlin G. T. A two-year study of bacterial, viral, and parasitic agents associated with diarrhea in rural Bangladesh. J Infect Dis. 1980 Nov;142(5):660–664. doi: 10.1093/infdis/142.5.660. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Burgess M. N., Bywater R. J., Cowley C. M., Mullan N. A., Newsome P. M. Biological evaluation of a methanol-soluble, heat-stable Escherichia coli enterotoxin in infant mice, pigs, rabbits, and calves. Infect Immun. 1978 Aug;21(2):526–531. doi: 10.1128/iai.21.2.526-531.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Caprioli A., Falbo V., Roda L. G., Ruggeri F. M., Zona C. Partial purification and characterization of an escherichia coli toxic factor that induces morphological cell alterations. Infect Immun. 1983 Mar;39(3):1300–1306. doi: 10.1128/iai.39.3.1300-1306.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Colonna B., Nicoletti M., Visca P., Casalino M., Valenti P., Maimone F. Composite IS1 elements encoding hydroxamate-mediated iron uptake in FIme plasmids from epidemic Salmonella spp. J Bacteriol. 1985 Apr;162(1):307–316. doi: 10.1128/jb.162.1.307-316.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Czirók E., Madár J., Budai J., Stverteczky Z., Kertész A., Dombi I., Gyengési L. The role in sporadic enteritis of facultatively enteropathogenic Escherichia coli serogroups. Acta Microbiol Acad Sci Hung. 1976;23(4):359–369. [PubMed] [Google Scholar]
  10. Dallas W. S., Gill D. M., Falkow S. Cistrons encoding Escherichia coli heat-labile toxin. J Bacteriol. 1979 Sep;139(3):850–858. doi: 10.1128/jb.139.3.850-858.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Dean A. G., Ching Y. C., Williams R. G., Harden L. B. Test for Escherichia coli enterotoxin using infant mice: application in a study of diarrhea in children in Honolulu. J Infect Dis. 1972 Apr;125(4):407–411. doi: 10.1093/infdis/125.4.407. [DOI] [PubMed] [Google Scholar]
  12. DuPont H. L., Formal S. B., Hornick R. B., Snyder M. J., Libonati J. P., Sheahan D. G., LaBrec E. H., Kalas J. P. Pathogenesis of Escherichia coli diarrhea. N Engl J Med. 1971 Jul 1;285(1):1–9. doi: 10.1056/NEJM197107012850101. [DOI] [PubMed] [Google Scholar]
  13. Edelman R., Levine M. M. From the National Institute of Allergy and Infectious Diseases. Summary of a workshop on enteropathogenic Escherichia coli. J Infect Dis. 1983 Jun;147(6):1108–1118. doi: 10.1093/infdis/147.6.1108. [DOI] [PubMed] [Google Scholar]
  14. Evans D. G., Evans D. J., Jr, Tjoa W. Hemagglutination of human group A erythrocytes by enterotoxigenic Escherichia coli isolated from adults with diarrhea: correlation with colonization factor. Infect Immun. 1977 Nov;18(2):330–337. doi: 10.1128/iai.18.2.330-337.1977. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Evans D. G., Silver R. P., Evans D. J., Jr, Chase D. G., Gorbach S. L. Plasmid-controlled colonization factor associated with virulence in Esherichia coli enterotoxigenic for humans. Infect Immun. 1975 Sep;12(3):656–667. doi: 10.1128/iai.12.3.656-667.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Evans D. J., Jr, Evans D. G., Young L. S., Pitt J. Hemagglutination typing of Escherichia coli: definition of seven hemagglutination types. J Clin Microbiol. 1980 Aug;12(2):235–242. doi: 10.1128/jcm.12.2.235-242.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. FORMAL S. B., KUNDEL D., SCHNEIDER H., KUNEVN, SPRINZ H. Studies with Vibrio cholerae in the ligated loop of the rabbit intestine. Br J Exp Pathol. 1961 Oct;42:504–510. [PMC free article] [PubMed] [Google Scholar]
  18. Formal S. B., Hale T. L., Sansonetti P. J. Invasive enteric pathogens. Rev Infect Dis. 1983 Sep-Oct;5 (Suppl 4):S702–S707. doi: 10.1093/clinids/5.supplement_4.s702. [DOI] [PubMed] [Google Scholar]
  19. Georges M. C., Wachsmuth I. K., Meunier D. M., Nebout N., Didier F., Siopathis M. R., Georges A. J. Parasitic, bacterial, and viral enteric pathogens associated with diarrhea in the Central African Republic. J Clin Microbiol. 1984 May;19(5):571–575. doi: 10.1128/jcm.19.5.571-575.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Gothefors L., Ahrén C., Stoll B., Barua D. K., Orskov F., Salek M. A., Svennerholm A. M. Presence of colonization factor antigens on fresh isolates of fecal Escherichia coli: a prospective study. J Infect Dis. 1985 Dec;152(6):1128–1133. doi: 10.1093/infdis/152.6.1128. [DOI] [PubMed] [Google Scholar]
  21. Hacker J., Hughes C. Genetics of Escherichia coli hemolysin. Curr Top Microbiol Immunol. 1985;118:139–162. doi: 10.1007/978-3-642-70586-1_8. [DOI] [PubMed] [Google Scholar]
  22. 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]
  23. Kado C. I., Liu S. T. Rapid procedure for detection and isolation of large and small plasmids. J Bacteriol. 1981 Mar;145(3):1365–1373. doi: 10.1128/jb.145.3.1365-1373.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Kopecko D. J., Baron L. S., Buysse J. Genetic determinants of virulence in Shigella and dysenteric strains of Escherichia coli: their involvement in the pathogenesis of dysentery. Curr Top Microbiol Immunol. 1985;118:71–95. doi: 10.1007/978-3-642-70586-1_5. [DOI] [PubMed] [Google Scholar]
  25. Labrec E. H., Schneider H., Magnani T. J., Formal S. B. EPITHELIAL CELL PENETRATION AS AN ESSENTIAL STEP IN THE PATHOGENESIS OF BACILLARY DYSENTERY. J Bacteriol. 1964 Nov;88(5):1503–1518. doi: 10.1128/jb.88.5.1503-1518.1964. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Le Minor S., Le Coueffic E. Etude sur les hémolysines des enterobacteriaceae. Ann Microbiol (Paris) 1975 Oct-Nov;126(3):313–332. [PubMed] [Google Scholar]
  27. Levine M. M., Edelman R. Enteropathogenic Escherichia coli of classic serotypes associated with infant diarrhea: epidemiology and pathogenesis. Epidemiol Rev. 1984;6:31–51. doi: 10.1093/oxfordjournals.epirev.a036274. [DOI] [PubMed] [Google Scholar]
  28. Levine M. M., Nataro J. P., Karch H., Baldini M. M., Kaper J. B., Black R. E., Clements M. L., O'Brien A. D. The diarrheal response of humans to some classic serotypes of enteropathogenic Escherichia coli is dependent on a plasmid encoding an enteroadhesiveness factor. J Infect Dis. 1985 Sep;152(3):550–559. doi: 10.1093/infdis/152.3.550. [DOI] [PubMed] [Google Scholar]
  29. 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]
  30. Mathewson J. J., Johnson P. C., DuPont H. L., Morgan D. R., Thornton S. A., Wood L. V., Ericsson C. D. A newly recognized cause of travelers' diarrhea: enteroadherent Escherichia coli. J Infect Dis. 1985 Mar;151(3):471–475. doi: 10.1093/infdis/151.3.471. [DOI] [PubMed] [Google Scholar]
  31. Mathewson J. J., Johnson P. C., DuPont H. L., Satterwhite T. K., Winsor D. K. Pathogenicity of enteroadherent Escherichia coli in adult volunteers. J Infect Dis. 1986 Sep;154(3):524–527. doi: 10.1093/infdis/154.3.524. [DOI] [PubMed] [Google Scholar]
  32. Moon H. W., Whipp S. C., Argenzio R. A., Levine M. M., Giannella R. A. Attaching and effacing activities of rabbit and human enteropathogenic Escherichia coli in pig and rabbit intestines. Infect Immun. 1983 Sep;41(3):1340–1351. doi: 10.1128/iai.41.3.1340-1351.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Moseley S. L., Echeverria P., Seriwatana J., Tirapat C., Chaicumpa W., Sakuldaipeara T., Falkow S. Identification of enterotoxigenic Escherichia coli by colony hybridization using three enterotoxin gene probes. J Infect Dis. 1982 Jun;145(6):863–869. doi: 10.1093/infdis/145.6.863. [DOI] [PubMed] [Google Scholar]
  34. Moyenuddin M., Rahman K. M. Enteropathogenic Escherichia coli diarrhea in hospitalized children in Bangladesh. J Clin Microbiol. 1985 Nov;22(5):838–840. doi: 10.1128/jcm.22.5.838-840.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. 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]
  36. Rothbaum R., McAdams A. J., Giannella R., Partin J. C. A clinicopathologic study of enterocyte-adherent Escherichia coli: a cause of protracted diarrhea in infants. Gastroenterology. 1982 Aug;83(2):441–454. [PubMed] [Google Scholar]
  37. SERENY B. Experimental shigella keratoconjunctivitis; a preliminary report. Acta Microbiol Acad Sci Hung. 1955;2(3):293–296. [PubMed] [Google Scholar]
  38. Sack R. B., Gorbach S. L., Banwell J. G., Jacobs B., Chatterjee B. D., Mitra R. C. Enterotoxigenic Escherichia coli isolated from patients with severe cholera-like disease. J Infect Dis. 1971 Apr;123(4):378–385. doi: 10.1093/infdis/123.4.378. [DOI] [PubMed] [Google Scholar]
  39. Sansonetti P. J., Hale T. L., Dammin G. J., Kapfer C., Collins H. H., Jr, Formal S. B. Alterations in the pathogenicity of Escherichia coli K-12 after transfer of plasmid and chromosomal genes from Shigella flexneri. Infect Immun. 1983 Mar;39(3):1392–1402. doi: 10.1128/iai.39.3.1392-1402.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Scaletsky I. C., Silva M. L., Trabulsi L. R. Distinctive patterns of adherence of enteropathogenic Escherichia coli to HeLa cells. Infect Immun. 1984 Aug;45(2):534–536. doi: 10.1128/iai.45.2.534-536.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  41. Ulshen M. H., Rollo J. L. Pathogenesis of escherichia coli gastroenteritis in man--another mechanism. N Engl J Med. 1980 Jan 10;302(2):99–101. doi: 10.1056/NEJM198001103020207. [DOI] [PubMed] [Google Scholar]

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