BACKGROUND Like many members of the Enterobacteriaceae family, Yersinia ruckeri has the ability to invade non professional phagocytic cells. Intracellular location is advantageous for the bacterium because it shields it from the immune system and can help it cross epithelial membranes and gain entry into the host. In the present manuscript, we report on our investigation regarding the mechanism...

Both pathogenic and non-pathogenic bacteria were isolated from fish, both salmonid and non-salmonid, from selected river systems in Natal. Pasteurella pisicida was isolated for the first time from fish in South Africa. The isolation of Yersinia ruckeri, Aeromonas salmonicida, and Edwardsiella tarda were recorded for the first time from fish in Natal. A. hydrophila and Flexibacter columnaris wer...

The effect of oral vaccines against bacterial fish diseases has been a topic for debate for decades. Recently both M-like cells and dendritic cells have been discovered in the intestine of rainbow trout. It is therefore likely that antigens reaching the intestine can be taken up and thereby induce immunity in orally vaccinated fish. The objective of this project was to investigate whether oral ...

The main objective of this study was to evaluate the pathogenicity of isolated   Yersinia ruckeri  from Caspian trout. Y. ruckeri specimens were isolated from infected rainbow trout farms located in north of Iran. The identification was confirmed by biochemical tests and 16s rRNA gene sequencing. The pathogenicity test was carried out to determine the virulence of the Y. ruckeri by IP injection...

This study was conducted to examine in vitro antibacterialpotential from seed methanol extract of Peganum harmala (L) against some fish pathogenic bacteria including Lactococcus garvieae, Aeromonas hydrophila, Yersinia ruckeri and Pseuodomonas putida isolated from diseased rainbow trout (Oncorhynchus mykiss). The antibacterial activity of extracts was evaluated using disc diffusion assay, m...

Antimicrobial resistance is a global threat to several industries, in addition public health. The misuse of antibiotics aquaculture leads the development and limits effects treatment. It important determine antimicrobial proper doses decide on optimum treatment strategies avoid excessive antibiotic use. In this study, three bacterial fish pathogens (Lactococcus garvieae, Vibrio anguillarum, Yer...

The aim of this study was to assess the effect oral vaccination against Yersinia ruckeri based on oxidative stress biomarkers in gills rainbow trout (Oncorhynchus mykiss Walbaum). vaccine consisted three Y. strains (O1 serotype) that originated from cultured different farms, where fish exhibited clinical signs enteric redmouth disease. concentrated incorporated into food; treatment delivered ti...

Accurate and quick identification of bacterial fish disease has great importance for effective control prevent economic loss in aquaculture facilities. Generally used agar media allow the growth wide-range bacteria but new chromogenic results colored colonies that lead to presumptive without requiring biochemical or serological tests. In this study, recently commercialized media; chromID® CPS® ...