background and objectives: this paper describes chemical composition and antimicrobial activity of cymbopogon nardus citronella essential oil against edwardsiella spp. (n = 21), vibrio spp. (n = 6), aeromonas spp. (n = 2), escherichia coli (n = 2), salmonella spp. (n = 2), flavobacterium spp. (n = 1), pseudomonas spp. (n = 1) and streptococcus spp. (n = 1) isolated from internal organs of aquat...

Experimental infection of fish for vaccine efficacy studies is associated with several limitations. Administration of live bacteria with the purpose of causing disease in fish can be performed by co-habitation, immersion or injection. We have developed a new Aeromonas salmonicida challenge method for rainbow trout and have applied it for evaluation of furunculosis vaccine efficacy. The method r...

Bacterial diseases are among the most important causes of losses among fish stocks in the aquaculture industry, affecting the economic development of the sector in many countries. The ability of bacteria to cause disease depends to a large extent on the expression of virulence factors, which help them to invade the host, produce pathological effects and evade host defences. The study of these f...

Severe systemic mycobacteriosis without typical granuloma formation was diagnosed in a group of six mature, captive, striated frogfish Antennarius striatus approximately 5 mo after fish originating from Brazil were purchased by Mote Marine Laboratory Aquarium. Beginning 1 mo after spawning, over a period of 9 mo, individuals began to show a variety of signs including egg retention, ocular opaci...

Sepsis is a serious clinical condition that is characterized by a systemic inflammatory response syndrome resulting from a known or suspected infection. The major clinical symptoms involve an abnormal WBC count, elevated body temperature, respiration and pulse rate. Reported cases with high mortality rate range between 13 20 million. In order to treat Sepsis, the detection of bacteria in blood ...

abstract- lactic acid bacteria are commonly found in the gastrointestinal tract of various endothermic animals and humans, in milk, dairy and seafood products and on some plant surfaces. the aim of this study was to investigate the inhibitory effect of isolated lactic acid bacteria from intestines of narrow-barred spanish mackerel (scomberomorus commerson) on listeria innocua growth. five strai...

this study examined the effects of two bacteria (bacillu subtilis bp6 and lactobacillus plantarum lp3) on survival, growth and digestive tract microflora of achanthopagrus latus larvae with different delivery methods. for each bacterium was considered three treatments with different delivery methods. in first treatment, fish larvae were exposed to each bacterium through feeding them with bacter...

five common tetracycline resistance genes tet(a), tet(b), tet(m), tet(o) and tet(s) were studied by polymerase chain reaction in 100 bacteria isolated from iranian fish farms. in the antibiogram test most of the bacteria were either intermediately or completely resistant to tetracycline. nine isolates out of 46 aeromonas spp. contained either tet(a/m/s) resistant genes as follows: tet(a) in a. ...

The study was undertaken to determine bacterial contamination of warm-water fish ponds and silver carps harvested from those ponds in Guilan province, Iran. In this respect, water samples were taken from 7 ponds and investigated by testing total bacteria, coliforms, and Escherichia coli. In addition, skin swab samples of silver carps caught from each pond were studied for enumeration of the sam...

Fish-borne illness is associated with pathogenic bacteria, Vibrio spp., transmitted from contaminated aquaculture water to fish. But little is known about the correlation between water quality in aquaculture and subsequent bacterial contamination in fish products. The degree of bacterial transmission from Vibrio spp. contaminated aquaculture water to fish was investigated. V. anguillarum, V. pa...