Piscirickettsia salmonis: A Gram-negative intracellular bacterial pathogen of fish

J. L. Fryer, Ronald Hedrick

Research output: Contribution to journalReview articlepeer-review

151 Scopus citations


Piscirickettsia salmonis is the first Gram-negative, intracellular bacterial pathogen isolated from fish and is a significant cause of mortality in salmonid fish. Recent reports of P. salmonis or P. salmonis-like organisms from new fish hosts and geographic regions have increased the interest in the bacterium. In this review, the important characteristics of the bacterium including recent taxonomic changes, features of the disease caused by the bacterium including transmission, hosts, reservoirs, diagnostic procedures, and current approaches for prevention and treatment have been discussed. The reader is also directed to other reviews concerning the bacterium and the disease it causes (Fryer & Lannan 1994, 1996; Almendras & Fuentealba 1997; Lannan, Bartholomew & Fryer 1999; House & Fryer 2002; Mauel & Miller 2002).

Original languageEnglish (US)
Pages (from-to)251-262
Number of pages12
JournalJournal of Fish Diseases
Issue number5
StatePublished - May 1 2003


  • Control
  • Diagnosis
  • Epidemiology
  • Piscirickettsia salmon
  • Piscirickettsiosis
  • Review
  • Taxonomy

ASJC Scopus subject areas

  • Aquatic Science
  • veterinary (miscalleneous)


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