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Iowa State University

2003

Veterinary Microbiology and Immunobiology

Iss

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Prediction Of Chicken Embryo Lethality With The Avian Escherichia Coli Traits Complement Resistance, Colicin V Production, And Presence Of The Increased Serum Survival Gene Cluster (Iss), Penelope S. Gibbs, John J. Maurer, Lisa K. Nolan, Richard E. Wooley Apr 2003

Prediction Of Chicken Embryo Lethality With The Avian Escherichia Coli Traits Complement Resistance, Colicin V Production, And Presence Of The Increased Serum Survival Gene Cluster (Iss), Penelope S. Gibbs, John J. Maurer, Lisa K. Nolan, Richard E. Wooley

Lisa K. Nolan

Differentiating between virulent and avirulent avian Escherichia coli isolates continues to be a problem for poultry diagnostic laboratories and the study of colibacillosis in poultry. The ability of a laboratory to conduct one simple test that correlates with virulence would simplify studies in these areas; however, previous studies have not enabled researchers to establish such a test. In this study, the occurrence of certain phenotypic and genotypic traits purported to contribute to avian E. coli virulence in 20 avian E. coli isolates was correlated with the results of embryo challenge studies. This analysis was undertaken in an effort to determine …


Monoclonal Antibodies To Avian Escherichia Coli Iss, Steven L. Foley, Shelley M. Horne, Catherine W. Giddings, Thomas R. Gustad, Erick D. Handegard, Michael Robinson, Lisa K. Nolan Jan 2003

Monoclonal Antibodies To Avian Escherichia Coli Iss, Steven L. Foley, Shelley M. Horne, Catherine W. Giddings, Thomas R. Gustad, Erick D. Handegard, Michael Robinson, Lisa K. Nolan

Lisa K. Nolan

Escherichia coli infections are a major problem for the poultry industry in the United States. Yet, the virulence mechanisms operative in avian E. coli are poorly understood. In the present studies, monoclonal antibodies (MAbs) have been generated that may facilitate study of the pathogenesis of avian colibacillosis. These MAbs are directed against the Iss protein because results from our laboratory have shown that the possession of iss DNA sequences is strongly correlated with the E. coli implicated in avian colibacillosis. As part of an overall effort to explore the role of iss/Iss in colibacillosis pathogenesis, Iss protein has been purified, …