Emerging Infectious Disease ISSN: 1080-6059

Human Streptococcus agalactiae Isolate in Nile Tilapia (Oreochromis niloticus)

Joyce J. Evans

, 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)

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Figure

Mortality rates for 60 Nile tilapia at all doses (black line) and 10 tilapia each challenged with a human Streptococcus agalactiae isolate (#510012): 102 (gray line), 103 (green line), 106 (red line), and 107 (blue line) CFU/fish. No deaths occurred at 104 and 105 CFU/fish or in tryptic soy broth controls.

Figure. Mortality rates for 60 Nile tilapia at all doses (black line) and 10 tilapia each challenged with a human Streptococcus agalactiae isolate (#510012): 10² (gray line), 10³ (green line), 10⁶ (red line), and 10⁷ (blue line) CFU/fish. No deaths occurred at 10⁴ and 10⁵ CFU/fish or in tryptic soy broth controls.

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