Francisella orientalis is an important bacterial pathogen of marine and freshwater fish with worldwide distribution. Fish francisellosis is a severe subacute to chronic granulomatous disease, with high mortalities and high infectivity rates in cultured and wild fish. To date, there is no approved vaccine for this disease.
View Article and Find Full Text PDFNatural products with antimicrobial activity and their association with synthetic antimicrobials are a sustainable option in fish farming. The objective of this study was to determine antimicrobial activity, antibiofilm potential and synergism of five essential oils (EOs) with florfenicol against motile Aeromonas isolated from Amazonian Colossoma macropomum. As their major constituent, the EOs of the species of Aloysia triphylla, Croton cajucara (red and white morphotype), Cymbopongo citratus and Lippia gracilis present β-pinene (22.
View Article and Find Full Text PDFFlavobacterium columnare is the causative agent of columnaris disease in freshwater fish and four discrete genetic groups exist within the species, suggesting that the species designation requires revision. The present study determined the taxonomic status of the four genetic groups of F. columnare using polyphasic and phylogenomic approaches and included five representative isolates from each genetic group (including type strain ATCC 23463; genetic group 1).
View Article and Find Full Text PDFHistorically, piscine francisellosis in various warm-, temperate-, and cold-water fish hosts has been attributed to From 2015 to 2016, an undescribed sp. was recovered during mortality events in cultured spotted rose snapper () off the Pacific coast of Central America. Despite high mortality and emaciation, limited gross findings were observed in affected fish.
View Article and Find Full Text PDFThirty nine isolates of Flavobacterium columnare from Brazilian fish farms had their carbohydrate composition of EPS evaluated by high efficiency liquid chromatography, using the phenol-sulfuric acid method of EPS. The occurrence of capsules on F. columnare cells was not directly related to biofilm formation, and the predominant monosaccharide is glucose.
View Article and Find Full Text PDFA case of dyskeratosis congenita (DC) of an 11-year-old male is reported. He presented with the characteristic clinical triad of reticular pigmentation of the skin, dystrophic nails and oral lesions, and up to the present he had not developed hematological compromise. Oral lesions consisted of extensive tongue erosions and keratosis, and exuberant gingivitis associated.
View Article and Find Full Text PDFBackground: Orofacial granulomatosis is a clinical entity presenting with swelling of the facial and/or oral tissues in association with histologic evidence of noncaseating granulomatous inflammation. Labial swelling is the most common finding. Compromise of the gingival and periodontal tissues may occur but has rarely been described in the literature.
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