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Applied and Environmental Microbiology, July 2006, p. 5097-5099, Vol. 72, No. 7
0099-2240/06/$08.00+0     doi:10.1128/AEM.00075-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Enhancement of In Vitro Growth of Pathogenic Bacteria by Norepinephrine: Importance of Inoculum Density and Role of Transferrin

Phyllis M. O'Donnell,1* Hernan Aviles,1 Mark Lyte,2 and Gerald Sonnenfeld1

Department of Biological Sciences, Binghamton University, State University of New York, Binghamton, New York 13902,1 Department of Pharmacy Practice, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, Texas 794302

Received 11 January 2006/ Accepted 30 April 2006

Norepinephrine is a stress hormone that enhances bacterial growth. We examined the effects of a small inoculum on the norepinephrine-induced growth of species previously reported to be unaffected by norepinephrine. The results indicated that a reduced inoculum density is essential for observing norepinephrine-induced effects. Additional studies using serum-free media suggested that transferrin plays a role in norepinephrine-induced growth.

* Corresponding author. Mailing address: Binghamton University, State University of New York, P.O. Box 6000, Binghamton, NY 13902-6000. Phone: (607) 777-6230. Fax: (607) 777-6521. E-mail: odonnell{at}binghamton.edu.

Applied and Environmental Microbiology, July 2006, p. 5097-5099, Vol. 72, No. 7
0099-2240/06/$08.00+0     doi:10.1128/AEM.00075-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Oneal, M. J., Schafer, E. R., Madsen, M. L., Minion, F. C. (2008). Global transcriptional analysis of Mycoplasma hyopneumoniae following exposure to norepinephrine. Microbiology 154: 2581-2588 [Abstract] [Full Text]  
  • Everest, P. (2007). Stress and bacteria: microbial endocrinology. Gut 56: 1037-1038 [Full Text]  


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