Recovery of Streptococcus iniae from diseased fish previously vaccinated with a Streptococcus vaccine

Article Abstract:

Researchers report a new strain of Streptococcus iniae in trout farms in Israel despite the fact that fish are routinely vaccinated against this bacterium. Vaccination began in 1995, but in 1997, a new type of infection broke out. Normally, the organism only affects the fish's brain, but this new infection affects multiple organs and causes internal hemorrhaging.

Israel, Streptococcal infections

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Clonality and diversity of the fish pathogen Lactococcus garvieae in mediterranean countries

Article Abstract:

The population structure of Lactococcus garvieae are examined by comparing 81 strains isolated from different sources and ecosystems, in which the bacterium is commonly found, in order to understand the genetic links among strains originating from different countries. The combined results show that in endemic sites the bacterial population displays a clonal structure, whereas bacterial diversity characterizes sites where the infection is sporadic.

Science & research, Genetic aspects, Biological diversity, Biodiversity, Microbiological research, Lactococcus

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Possible transmission of Streptococcus iniae from wild fish to cultured marine fish

Article Abstract:

A study was conducted to analyze the transmission of Streptococcus iniae from wild fish to cultured marine fish. The premise that organic matter, mud and seawater may be the reservoir of bacteria pathogenic for fish was examined. Results indicated that wild fish are potential amplifiers of pathogenic S. iniae strains. Findings also suggested that the presence of wild spine foot may hinder the transmission of S. iniae.

Streptococcus

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