Enteric pathogenesis, immunology, and vaccine development; epitopes of cholera enterotoxins and related enterotoxins from Escherichia coli, genetically-engineered chimeras, and synthetic peptides; Vibrio cholerae adherence mechanisms and iron-regulated membrane proteins; bacterial zinc-containing metalloproteases; iron and bacterial-host interactions; antimicrobial activity of human and bovine milk; colonial morphology (phase variation) in choleragenic vibrios; choleraphage and choleracins; Burkholderia (Pseudomonas) pseudomallei
