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Image #   25953D
Name:   Aeromonas hydrophila - Gram-negative, rod bacterium (prokaryote)
Copyright:   Copyright 2009 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Aeromonas hydrophila - Gram-negative, facultatively anaerobic, oxidase positive, rod bacterium (prokaryote). Aeromonas hydrophila is a bacterium that occurs in all types of aquaticenvironments. It is motile by polar flagella and can survive in aerobic and anaerobic environments. A. hydrophila causes diseases (infections) especially in fresh water fish including tail rot, fin rot, red fin disease and hemorrhagic septicemia. Hemorrhagic septicemia in fresh water fish is characterized by the presence of small surface lesions, often leading to sloughing off of the scales, hemorrhaging in the gills and anus, ulcers, abscesses, exophthalmia (bulging eyes), and abdominal swelling (dropsy). It also causes infections in other aquatic animals such as amphibians. When A. hydrophila enters the body, it travels through the bloodstream to the first available organ. It produces Aerolysin Cytotoxic Enterotoxin (ACT), a toxin that can cause tissue damage. In humans Aeromonas hydrophila causes gastroenteritis. It is also associated with cellulitis, an infection that causes inflammation in the skin tissue and can cause diseases such as myonecrosis and eczema in immunocompromised patients. It is also very hard to kill, because it is a resistant bacterium to certain antibiotics and chemotherapeutic agents. Chloramphenicol, florenicol, tetracycline, sulfonamide, and nitrofuran derivatives are used to eliminate and control the bacterial infection.
Magnification*: x2,600
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   25953D bacteria disease aquatic disease Aeromonas exophthalmia dropsy Aeromonas hydrophila pathogenic bacteria pathogenic bacterium resistant bacteria resistant bacterium aquatic bacteria aquatic bacterium opportunistic pathogens bacterial pathogen opportunistic pathogen bacteria pathogen antibiotic resistance antibiotic resistant antibiotic resistant bacteria antibiotic resistant bacterium aerolysin cytotoxic enterotoxin cytotoxic enterotoxin enterotoxin dysenteric gastroenteritis gastroenteritis cellulitis immunocompromised patient myonecrosis fresh water bacteria fresh water bacterium freshwater bacteria freshwater bacterium marine bacteria marine bacterium salt water bacteria salt water bacterium saltwater bacteria saltwater bacterium 04.01.09 ACT bacilli bacillus polar flagella polar flagellum rod rod bacteria rod bacterium rod shaped bacteria rod shaped bacterium rod-shaped bacteria rod-shaped bacterium Gram negative Gram-negative aerobic anaerobic facultative anaerobic facultatively anaerobic oxidase positive oxidase-positive aquatic environment aquatic environments bacteria disease bacteria diseases bacteria infection bacteria infections fresh water fish disease fresh water fish diseases freshwater fish disease freshwater fish diseases fin rot red tail rot tail rot red fin rot red fin disease hemorrhagic septicemia abscess abscesses ulcer ulcers bacterial infection bacterial infections amphibian pathogen fish pathogen human pathogen SEM coccobacilli coccobacillus fish disease fish infection infection

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