Indole-lnduced, Green to Brown-Black Pigment Formation by an Acinetobacter Strain from Beef

Author:

VANDERZANT C.1,SAVELL J. W.1,HAMBY P. L.1,ACUFF G. R.1,COX N. A.1,BAILEY J. S.1

Affiliation:

1. Department of Animal Science, Texas Agricultural Experiment Station, Texas A & M University, College Station, Texas 77843 and Agricultural Research Service, Richard B. Russell Agricultural Research Center, Athens, Georgia 30613

Abstract

In determining aerobic plate counts of surfaces of beef carcasses, green to brown-black colonies of an Acinetobacter sp. appeared on tryptic soy agar plates. Pigmentation was induced by indole-producing organisms in close proximity of or overlapping with the Acinetobacter sp. Addition of indole to culture media also supported pigmentation of the Acinetobacter sp. Indole appeared to be a key intermediate compound in pigment formation.

Publisher

International Association for Food Protection

Subject

Microbiology,Food Science

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