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Volume 7, Number 5—October 2001
Dispatch

A Unique Mycobacterium Species Isolated from an Epizootic of Striped Bass (Morone saxatilis)

Martha W. Rhodes*Comments to Author , Howard Kator*, Shaban Kotob*, Peter van Berkum†, Ilsa Kaattari*, Wolfgang Vogelbein*, Margaret M. Floyd‡, W. Ray Butler‡, Frederick D. Quinn‡, Christopher Ottinger§, and Emmett Shotts§
Author affiliations: *Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, Virginia, USA; †U. S. Department of Agriculture, Beltsville, Maryland, USA; ‡Centers for Disease Control and Prevention, Atlanta, Georgia, USA; §National Fish Health Research Laboratory, Kearneysville, West Virginia, USA

Main Article

Table

Comparison of distinguishing phenotypic features of Mycobacterium sp. isolate M175 with genetically (16S rRNA) similar Mycobacterium spp. (M. bovis, M. marinum, M. tuberculosis, and M. ulcerans)a

Mycobacterium sp.
Characteristic (fish isolate M175) M. bovis M. marinum M. tuberculosis M. ulcerans
Optimum growth temperature (°C) <30 37 30 37 30
Colony morphology Rb R S R S/R
Pigmentation N N P N N
Arylsulfatase
3 days
14 days -
- -
- V
+ -
- -
+
Niacin + - -/V + -/V
Nitrate reduction - - - + -
Pyrazinamidase
7 days - - + + -
Tween hydrolysis - V + V -
Urease + + + + -

aData for known species cited from references 17 and 18.
bAbbreviations:N = nonpigmented; P = photochromogenic; R = rough; S = smooth; + = at least 85% strains positive; - = at least 85% negative; V = variable.

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