Pacific oyster nocardiosis: Isolation of the bacterium and induction of laboratory infections

Carolyn S. Friedman, Ronald Hedrick

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A recently isolated bacterium is associated with and augments mortalities among adult Pacific oysters, Crassostrea gigas, reared in warm, eutrophic embayments in Washington state and British Columbia, Canada. The bacterium was isolated from both hemolymph and adductor muscle pustules from infected animals. The actinomycete-like bacterium stained Gram-positive, acid-fast, and periodic acid-Schiff base-positive. The presence of catalase, a trilaminar cell wall, and common antigens with Nocardia spp. indicates that the bacterium belongs in this genus. Experimentally induced infections of oysters had gross and microscopic signs and mortality levels similar to those observed in natural infections with the bacterium. Concentrations of 1.44 × 105 cfu/ml injected into the heart of adult Pacific oysters maintained in full-strength sea water at 21°C resulted in a 47% mortality within 34 days.

Original languageEnglish (US)
Pages (from-to)109-120
Number of pages12
JournalJournal of Invertebrate Pathology
Volume57
Issue number1
DOIs
StatePublished - Jan 1 1991

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Crassostrea gigas
bacterium
bacteria
infection
mortality
Nocardia
Actinobacteria
acids
Gram-positive bacteria
oysters
British Columbia
hemolymph
acid
twenty first century
catalase
antigen
seawater
heart
cell walls
Canada

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Pacific oyster nocardiosis : Isolation of the bacterium and induction of laboratory infections. / Friedman, Carolyn S.; Hedrick, Ronald.

In: Journal of Invertebrate Pathology, Vol. 57, No. 1, 01.01.1991, p. 109-120.

Research output: Contribution to journalArticle

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