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Volume 15, Number 5—May 2009
Dispatch

Human Streptococcus agalactiae Isolate in Nile Tilapia (Oreochromis niloticus)

Joyce J. EvansComments to Author , Phillip H. Klesius, David J. Pasnik, and John F. Bohnsack
Author affiliations: US Department of Agriculture, Chestertown, Maryland, USA (J.J. Evans, D.J. Pasnik); US Department of Agriculture, Auburn, Alabama, USA (P.H. Klesius); University of Utah Health Sciences Center, Salt Lake City, Utah, USA (J.F. Bohnsack)

Main Article

Table

Mortality rates among Nile tilapia (Oreochromis niloticus) infected with Streptococcus agalactiae*

Dose (CFU/fish) No. (%)† deaths
Tryptic soy broth (control) 0a
102 3 (30)ab
103 1 (10)a
104 0a
105 0a
106 5 (50)b
107 3 (30)ab

*Ten fish per dose group were intraperitoneally injected with human S. agalactiae/fish or tryptic soy broth and observed for 14 days postchallenge at a water temperature of 32°C.
†Superscript letters indicate significant differences (p<0.05) in percentage mortality rates between groups, determined by using the SAS program (SAS Institute, Cary, NC, USA) lifetest procedure (Kaplan-Meier method).

Main Article

Page created: December 16, 2010
Page updated: December 16, 2010
Page reviewed: December 16, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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