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United States Department of Agriculture

Agricultural Research Service

Related Topics

SAMUEL HUMPHREY
National Animal Disease Center
Microbiologist

Phone: (515) 337-7495
Fax: (515) 337-7402
P.O. BOX 70
1920 DAYTON AVE
AMES, IA, 50010


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Antibiotics in feed induce prophages in swine fecal microbiomes - (Peer Reviewed Journal)
Allen, H.K., Looft, T.P., Bayles, D.O., Humphrey, S.B., Levine, U.Y., Alt, D.P., Stanton, T.B. 2011. Antibiotics in feed induce prophages in swine fecal microbiomes. mBio [serial online]. 2(6). Available: http://mbio.asm.org/content/2/6/e00260-11.
Chlortetracycline - resistant intestinal bacteria in organically-raised and feral swine - (Peer Reviewed Journal)
Stanton, T.B., Humphrey, S.B., Stoffregen, W.C. 2011. Chlortetracycline - resistant intestinal bacteria in organically-raised and feral swine. Applied and Environmental Microbiology. 77(20):7167-7170.
The persistence of antibiotic resistance: evaluation of a probiotic approach using antibiotic-sensitive M. elsdenii strains to prevent colonization of swine by antibiotic-resistant strains - (Peer Reviewed Journal)
Stanton, T.B., Humphrey, S.B. 2011. Persistence of antibiotic resistance: evaluation of a probiotic approach using antibiotic-sensitive M. elsdenii strains to prevent colonization of swine by antibiotic-resistant strains. Applied and Environmental Microbiology. 77(20):7158-7166.
Diverse Phage in the Swine Intestine - (Abstract Only) - (02-May-10)
Characteristics and Induction of VSH-1, Gene Transfer Agent of B. hyodysenteriae - (Abstract Only)
Stanton, T.B., Humphrey, S.B., Zuerner, R.L. 2009. Characteristics and Induction of VSH-1, Gene Transfer Agent of B. hyodysenteriae [abstract]. In: Proceedings of 5th International Conference on Colonic Spirochaetal Infections in Animals and Humans, June 8-10, 2009, Leon, Spain. p.25-26.
Identification of a Divided Genome for VSH-1, the Prophage-Like Gene Transfer Agent of Brachyspira hyodysenteriae - (Peer Reviewed Journal)
Stanton, T.B., Humphrey, S.B., Bayles, D.O., Zuerner, R.L. 2008. Identification of a Divided Genome for VSH-1, the Prophage-Like Gene Transfer Agent of Brachyspira hyodysenteriae. Journal of Bacteriology. 191(5):1719-1721.
Collateral Effects of Antibiotics - Carbadox and Metronidazole Induce Vsh-1 and Facilitate Gene Transfer among Brachyspira Hyodysenteriae Strains - (Peer Reviewed Journal)
Stanton, T.B., Humphrey, S.B., Sharma, V.K., Zuerner, R.L. 2008. Collateral effects of antibiotics - carbadox and metronidazole induce VSH-1 and facilitate gene transfer among Brachyspira hyodysenteriae strains. Applied and Environmental Microbiology. 74(10):2950-2956.
Antimicrobial Collateral Effects: Induction of the Prophage-Like, Gene Transfer Agent Vsh-1 in Cultures of the Swine Pathogen Brachypsira Hyodysenteriae - (Abstract Only)
Stanton, T.B., Sharma, V.K., Humphrey, S.B., Zuerner, R.L. 2006. Antimicrobial collateral effects: Induction of the prophage-like, gene transfer agent VSH-1 in cultures of the swine pathogen Brachypsira hyodysenteriae [abstract]. American Society for Microbiology. May 20-26, 2006, Orlando, Florida. 2006 CDROM.
Identification of Genes of Vsh-1, a Prophage-Like Gene Transfer Agent of Brachyspira Hyodysenteriae - (Peer Reviewed Journal)
Matson, E.G., Thompson, M., Humphrey, S.B., Zuerner, R.L., Stanton, T.B. 2005. Identification of genes of VSH-1, a prophage-like gene transfer agent of Brachyspira hyodysenteriae. Journal of Bacteriology. 187(17):5885-5892.
Vsh-1, a Prophage-Like, Gene Transfer Agent of Brachyspira Hyodysenteriae and (Probably) of Other Brachyspira Species - (Abstract Only)
Stanton, T.B., Matson, E.G., Humphrey, S.B., Zuerner, R.L., Sharma, V.K. 2005. VSH-1, a prophage-like, gene transfer agent of Brachyspira hyodysenteriae and (probably) of other Brachyspira species [abstract]. Third International Conference on Colonic Spirochaetal Infections in Animals and Humans. p. 15-16.
Hybrid Tet Genes and Tet Gene Nonmenclature - Request for Opinion - (Peer Reviewed Journal)
Stanton, T.B., Humphrey, S.B., Scott, K.P., Flint, H.J. 2005. Hybrid tet genes and tet gene nonmenclature - request for opinion. Antimicrobial Agents and Chemotherapy. 49(3):1265-1266.
Characteristics of Vsh-1 Gene Transcription in Brachyspira Hyodysenteriae - (Abstract Only)
MATSON, E.G., HUMPHREY, S.B., ZUERNER, R.L., STANTON, T.B. CHARACTERISTICS OF VSH-1 GENE TRANSCRIPTION IN BRACHYSPIRA HYODYSENTERIAE. PROCEEDINGS OF THE GORDON RESEARCH CONFERENCE. 2004. P. 2.
Detection of Bacteriophage Vsh-1 Svp38 Gene in Brachyspira Spirochetes - (Peer Reviewed Journal)
STANTON, T.B., THOMPSON, M.G., HUMPHREY, S.B., ZUERNER, R.L. DETECTION OF BACTERIOPHAGE VSH-1 SVP38 GENE IN BRACHYSPIRA SPIROCHETES. FEDERATION OF EUROPEAN MICROBIOLOGICAL SOCIETIES MICROBIOLOGY LETTERS. 2003. V. 224. P. 225-229.
Isolation of Tetracycline-Resistant Megasphaera Elsdenii Strains with Novel Mosaic Gene Combinations of Tet(o) and Tet(w) from Swine - (Peer Reviewed Journal)
STANTON, T.B., HUMPHREY, S.B. ISOLATION OF TETRACYCLINE-RESISTANT MEGASPHAERA ELSDENII STRAINS WITH NOVEL MOSAIC GENE COMBINATIONS OF TET(O) AND TET(W) FROM SWINE. APPLIED AND ENVIRONMENTAL MICROBIOLOGY. 2003. V. 69. P. 3874-3882.
Unusual Tetracycline Resistance in Megasphaera Elsdenii Strains from Swine Cecal Contents - (Abstract Only)
Stanton, T.B., Humphrey, S.B. 2002. Unusual tetracycline resistance in megasphaera elsdenii strains from swine cecal contents [abstract]. American Society for Microbiology. p. 515.
Identification of Bacteriophage Vsh-1 Genes and Analysis of Their Induction of Brachyspira Hyodysenteriae - (Abstract Only)
Matson, E.G., Humphrey, S.B., Thompson, M.G., Stanton, T.B. 2002. Identification of bacteriophage vsh-1 genes and analysis of their induction of brachyspira hyodysenteriae [abstract]. American Society for Microbiology. p. 179.
Vsh-1, a Generalized Transducing Bacteriophage of the Anaerobic Spirochete Brachyspira Hyodysenteriae, Appears Defective in Self-Replication - (Abstract Only) - (24-May-01)
Brachyspira (Serpulina) Hyodysenteriae Gyrb Mutants and Interstrain Transfer of Coumermycin A1 Resistance - (Peer Reviewed Journal) - (09-Feb-01)
Brachyspira (Serpulina) Hyodysenteriae Gyrb Mutants and Intercellular Transfer of Coumermycin Resistance - (Abstract Only) - (14-Nov-00)
Identifying Genes of Vsh-1, a Novel Gene Transfer Agent of the Enteropathogenic Spirochete S. Hyodysenteriae - (Abstract Only) - (06-Oct-98)
Big Fleas Have Little Fleas? Vsh-1, An Unusual Bacteriophage of Serpulina Hyodysenteriae (Australian Society for Microbiology MTG.) - (Abstract Only) - (29-Sep-97)
Identification of Genes Encoding Virion-Associated Proteins of Vsh-1, a Bacteriophage of Serpulina Hyodysenteriae - (Abstract Only) - (11-Nov-96)
Purification and Characterization of Vsh-1, a Generalized Transducing Bacteriophage of Serpulina Hyodysenteriae - (Peer Reviewed Journal) - (05-Nov-96)
Vsh-1, a Bacteriophage-Like Gene Vector for Serpulina Hyodysenteriae - (Proceedings) - (26-Jan-96)
Mitomycin C Induction of Bacteriophages from Serpulina Hyodysenteriae and Serpulina Innocens - (Peer Reviewed Journal) - (04-Oct-95)
Last Modified: 9/29/2014
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