Streptococcus iniae infections in Red Sea cage-cultured and wild fishes

A. Colorni, A. Diamant, A. Eldar, H. Kvitt, A. Zlotkin

Research output: Contribution to journalArticlepeer-review

Abstract

Streptococcus iniae was isolated from 2 moribund wild Red Sea fishes, Pomadasys stridens (Pomadasyidae) and Synodus variegatus (Synodontidae), both collected in shallow waters along the Israeli coast of the Gulf of Eilat. The site is approximately 2 km from a mariculture cage farm in which streptococcal infections were diagnosed in previous years in the red drum Sciaenops ocellatus. This is the first report of S. iniae in Red Sea fishes. Biochemical and molecular similarities between the isolates from cultured fishes and those from the wild specimens suggest that a single strain is involved, and that 'amplification' and dispersal of this pathogen from captive to feral fishes have occurred. At the molecular level, the pathogen is different from the S. iniae isolates that have been afflicting the Israeli freshwater aquaculture in recent years. Although S. iniae prevalence in the wild fish populations of the area remains to be determined, the northernmost region of the Gulf of Eilat, virtually landlocked and with generally calm seas and weak currents, seems to be particularly vulnerable to the impact of diseases that develop in this mariculture system.

Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalDiseases of Aquatic Organisms
Volume49
Issue number3
DOIs
StatePublished - 3 Jun 2002
Externally publishedYes

Keywords

  • 16S rRNA
  • Dicentrarchus labrax
  • Fish disease
  • Mariculture
  • Oreochromis mossambicus
  • PCR
  • Red drum
  • Sciaenops ocellatus
  • Sea bass
  • Tilapia

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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