The Journal of Infectious Diseases 
Volume 137 • • May 1978 
Contents 
Participants 613 
Recombinant DNA: An Infectious Disease Perspective. Sherwood L. Gorbach 615 
Possible Effects of Foreign DNA on Pathogenic Potential and Intestinal Proliferation of Escher- 
ichia coli. Rolf Freter 624 
Virulence Factors of the Bacterial Cell Surface. Frits 0rskov 630 
Epidemiology of Escherichia coli in the United States. Eugene J. Gangarosa 634 
The Epidemiology of Diarrhea Due to Enterotoxigenic Escherichia coli. R. Bradley Sack . . 639 
Invasive Escherichia coli. Samuel B. Formal and Richard B. Hornick 641 
Factors Affecting Virulence in Escherichia coli Urinary Tract Infections. John Z. Montgom- 
erie 645 
Some Characteristics of Escherichia coli Strains Isolated from Extraintestinal Infections of Hu- 
mans. Barbara H. Minshew, Julius Jorgensen, Martha Swanstrum, Grada A. Grootes-Reu- 
vecamp, and Stanley Falkow 648 
Is It Safe to Use Escherichia c.oli K12 in Recombinant DNA Experiments? H. Williams Smith 655 
Intestinal Antibodies. Nathaniel F. Pierce 661 
Recombinant DNA and Autoimmune Disease. Jonathan King 663 
Discussion 667 
Biological Containment and Cloning Vector Transmissibility. Roy Curtiss III 668 
Mobilization of the Escherichia coli Plasmid ColEl (Colicin El) and ColEl Vectors Used in Re- 
combinant DNA Experiments. Gordon Dougan, J. H. Crosa, and Stanley Falkow 676 
Tests for Gene Flow between Eucaryotes and Procaryotes. Allan Campbell 681 
Plasmid Transfer in Escherichia coli. E. S. Anderson 686 
Emergence of Antibiotic-Resistant Bacteria in the Intestinal Flora of Farm Inhabitants. Stuart 
B. Levy 688 
Assessing the Likelihood of Contaminating Natural Populations of Bacteria with Chimeric Plas- 
mids. Bruci: R. Levin 691 
Host and Microbial DNA in the Gut Lumen. Lansing C. Hoskins 694 
Discussion 699 
Risk Assessment Protocols for Recombinant DNA Experimentation 704 
Discussion 709 
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