Diseased Fish
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. Diversidade populacional, vias de transmissÃo e virulÃncia de Streptococcus agalactiae isolados de tilÃpias do Nilo (Oreochromis niloticus). / Tilapia; Brazil; Streptococcus agalactiae, experimental infection;16SrRNA; ISR
Streptococcus agalactiae is an emerging pathogen in Nile tilapia. To investigate aspects of the epidemiology, transmission, virulence and the genetic diversity of S. agalactiae infections, nine outbreaks of meningoencephalitis and septicemia in Nile tilapia farms in Brazil were analyzed. The 16S rRNA gene and ISR were utilized with molecular marker of the ge
Publicado em: 2009
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2. DetecÃÃo de genes do Sistema de SecreÃÃo do Tipo III em Aeromonas hydrophila e sua relaÃÃo com a virulÃncia em tilÃpia do Nilo / Detection of the Type III Secretion System Genes in Aeromonas hydrophila and Its Relation with Virulence in Nile tilapia.
Aeromonas hydrophila à uma bactÃria patogÃnica para diversos hospedeiros dentre eles estÃo os seres humanos e os peixes O sistema de secreÃÃo do tipo III (T3SS) tem sido relatado como um dos mais importantes fatores de virulÃncia para bactÃrias Gram negativas incluindo A. hydrophila Neste estudo protocolos de PCR foram desenvolvidos para detectar os
Publicado em: 2009
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3. Florfenicol e biciclomicina: eficÃcia in vitro contra bactÃrias patogÃnicas de peixes de Ãgua doce. / In vitro efficacy of florfenicol e bicyclomycin to pathogenic bacteria from freshwater fish.
The Streptococcus agalactiae and the motile aeromonads are major pathogens for several tropical fish species, causing encephalitis and septicemia outbreaks, respectively, with high mortality in intensive culture systems. The use of antibiotic is the main control measure. The objective of this work was to determine the minimum inhibitory concentration (MIC) o
Publicado em: 2006
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4. Recovery of Streptococcus iniae from Diseased Fish Previously Vaccinated with a Streptococcus Vaccine
Streptococcus iniae was recovered from diseased rainbow trout (Oncorhynchus mykiss, Walbaum) previously vaccinated against streptococcosis. PCR and serological methods indicate the presence of a new serotype in the diseased fish.
American Society for Microbiology.
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5. Possible Transmission of Streptococcus iniae from Wild Fish to Cultured Marine Fish
Streptococcus iniae was isolated from diseased wild fish collected near a mariculture facility where gilthead sea bream and European sea bass exhibited a similar infection. Species-specific PCR and ribotyping confirmed that wild and cultured fish were infected by a single S. iniae clone. Wild fish are therefore potential amplifiers of pathogenic S. iniae str
American Society for Microbiology.
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6. Shieh medium supplemented with tobramycin for selective isolation of Flavobacterium columnare (Flexibacter columnaris) from diseased fish.
Tobramycin was found to be less inhibitory to Flavobacterium columnare (formerly Flexibacter columnaris) than to other fish-associated bacteria. The selective capacity of Shieh medium, an isolation medium described for this species, was markedly enhanced by adding tobramycin at a concentration of 1 microgram/ml.
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7. Isolation of Bacteriophages Specific to a Fish Pathogen, Pseudomonas plecoglossicida, as a Candidate for Disease Control
Two types of bacteriophage specific to Pseudomonas plecoglossicida, the causative agent of bacterial hemorrhagic ascites disease in cultured ayu fish (Plecoglossus altivelis), were isolated from diseased ayu and the rearing pond water. One type of phage, which formed small plaques, was tentatively classified as a member of the family Myoviridae, and the othe
American Society for Microbiology.
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8. Phenotypic and genomic studies of "Cytophaga psychrophila" isolated from diseased rainbow trout (Oncorhynchus mykiss) in France.
Five strains of gliding bacteria were isolated in France from farmed diseased rainbow trouts reared at low water temperature. The resemblance of these bacteria to the known fish pathogen "Cytophaga psychrophila" led to their comparative study with reference strain NCMB 1947 and with an American isolate. Morphological, physiological, and biochemical character
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9. Detection of R Factors in Naturally Occurring Vibrio anguillarum Strains
R factors were detected in Vibrio anguillarum strains from vibrio-diseased freshwater fish, ayu (Plecoglossus altivelis), in Japan. It was found that 65 out of the 68 random isolates from epidemics of vibrio disease in 1973 carried transferable drug resistance factors. The most common type determined resistance to sulfonamides, streptomycin, chloramphenicol,
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10. Host range susceptibility of Enterococcus sp. strains isolated from diseased turbot: possible routes of infection.
Experiments were conducted to assess the pathogenicity of Enterococcus sp. strains isolated from diseased turbot for several fish species (turbot, salmon, trout, and seabream), as well as for mice. The intraperitoneal injection assays indicated that the tested strains showed host specificity for turbot, with a high degree of virulence (50% lethal dose of 10(
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11. Presence of the fish pathogen Vibrio salmonicida in fish farm sediments.
The persistence of the fish pathogen Vibrio salmonicida in fish farm sediments was studied by use of fluorescent-antibody techniques. The specificities of the monoclonal antibodies and polyclonal rabbit serum used in the study were tested against a number of Vibrio strains, including 4 isolates from intestinal tracts of healthy fish and 98 isolates from sedi
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12. Evidence for the existence of distinct populations of Vibrio anguillarum serogroup O1 based on plasmid contents and ribotypes.
A total of 103 Vibrio anguillarum serogroup O1 strains displaying 15 different plasmid profiles were characterized with respect to biochemical properties and ribotypes. The results confirmed that V. anguillarum O1 is a biochemically homogeneous group. The 103 strains could be allocated to three main clusters with high similarity coefficients. None of the bio