We characterized a collection of 256 Aeromonas hydrophila strains isolated from blood, discharge and stool for their serogroup designation. Of these, 2.3% were untypable and 15.2% were rough strains. Among the typable strains, about 50% comprised serogroups O:11, O:16, O:18, O:34 and O:83. To develop rapid differentiation of Aeromonas from other oxidase-positive bacteria, antisera against Aeromonas were produced to establish a direct, genus-specific, agglutination test. It was found that among 105 isolates of Aeromonas, 102 showed positive results with the agglutination test. The calculated sensitivity and specificity were 97.1% and 90.7%, respectively.
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Vet Res Commun
December 2024
Universidade Federal do Vale do São Francisco (UNIVASF), Campus Ciências Agrárias, Km 12, BR 407, Lote 543, s/n, Projeto de Irrigação Senador Nilo Coelho, Petrolina, CEP 56300-000, PE, Brazil.
This study aimed to assess the effect of Croton conduplicatus essential oil (CCEO) in diets for tambaqui (Colossoma macropomum) (14.50 ± 0.07 g), a native Amazonian fish.
View Article and Find Full Text PDFMar Drugs
December 2024
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
SR21, a kind of eukaryotic heterotrophic organism rich in unsaturated fatty acids, is an emerging microbial alternative to fish oil. The dietary inclusion of 15% SR21 was optimal for the growth performance of zebrafish. Previous studies demonstrated that fructose-1,6-bisphosphate aldolase (FBA) of is a valuable broad-spectrum antigen against various pathogens in aquaculture (e.
View Article and Find Full Text PDFMar Drugs
November 2024
Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Beibu Gulf University, Qinzhou 535011, China.
Crustins are a family of antimicrobial peptides (AMPs) that play a pivotal role in the innate immune system of crustaceans. The discovery of novel AMPs from natural sources is crucial for expanding our current database of these peptides. Here, we identified and characterized a novel member of the crustin family, named Crus-SWD1, derived from .
View Article and Find Full Text PDFFront Microbiol
December 2024
Institute of Modern Aquaculture Science and Engineering (IMASE), Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou, China.
Introduction: The intricate habitats of aquatic organisms, coupled with the prevalence of pathogens, contribute to a high incidence of various diseases, particularly bacterial infections. Consequently, the formulation of sustainable and effective disease management strategies is crucial for the thriving aquaculture sector.
Methods And Results: In this investigation, a strain of , designated , was isolated from a freshwater fish pond.
Sci Total Environ
December 2024
Institute of Food Safety and Nutrition, Jinan University, Guangzhou 510632, China. Electronic address:
Polymyxin B is one of the last lines of defense in infections caused by multidrug-resistant Gram-negative bacteria. Aeromonas hydrophila are important fish pathogens and the occurrence of polymyxin B-resistant A. hydrophila isolates is increasing.
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