What is the morphology of Aeromonas hydrophila?

Aeromonas hydrophila are Gram-negative straight rods with rounded ends (bacilli to coccibacilli shape) usually from 0.3 to 1 µm in width, and 1 to 3 µm in length. Aeromonas hydrophila does not form endospores, and can grow in temperatures as low as four degrees Celsius. These bacteria are motile by a polar flagella.

What is the microscopic morphology of Aeromonas spp?

MICROSCOPIC APPEARANCE

Gram Stain: Negative.
Morphology: Cells straight, rod shaped with rounded ends to coccoid. Occur singly, in pairs or short chains.
Size: 0.3 – 1.0 micrometers by 1.0 – 3.5 micrometers.

Where is Aeromonas Salmonicida found?

Aeromonas salmonicida has been found to be ubiquitous and established in commercial fish farms, government fish hatcheries, and wild populations throughout the Great Lakes and connecting tributaries (Bruneau et al. 1999). However, the bacterium continues to be detected at very low prevalence (GLFHC 2006).

Is Aeromonas Salmonicida motile?

Aeromonas salmonicida, a non-motile aeromonad, is the aetiological agent of a bacterial septicaemia in fish, called furunculosis [2-4].

What are the characteristics of Aeromonas hydrophila?

Aeromonas hydrophila are gram- negative straight rods with rounded ends. They usually grow from 0.3 to 1.0 μm in diameter and 1.0 to 3.5 μm in length. Aeromonas hydrophila does not form endospores, and can grow in temperatures as low as 4°C. This bacterium is motile by polar flagella.

How do you identify Aeromonas hydrophila?

Approach to Identification: Aeromonas species are facultative anaerobes that are oxidase and catalase positive. This test must be performed on media without a fermentable sugar (ie MacConkey agar), because the fermentation process results in acidification of the medium and a false-negative result may result.

Is Aeromonas Gram-negative or positive?

The genus Aeromonas consists of gram-negative rods widely distributed in freshwater, estuarine, and marine environments. Aeromonas species have been isolated with increasing frequency during warmer months. The organisms cause a wide spectrum of disease syndromes among warm and cold-blooded animals.

Does Aeromonas grow on MacConkey Agar?

Aeromonas spp. grow well on common laboratory media including blood agar, nutrient, Hecteon enteric agar, MacConkey’s, and Luria Bertani.

Which disease is caused by Aeromonas Salmonicida?

furunculosis
The bacterium is pathogenic for fish, and causes the disease known as furunculosis. The symptoms the fish show are external and internal hemorrhaging, swelling of the vents and kidneys, boils, ulcers, liquefaction, and gastroenteritis.

Is caused by Aeromonas Salmonicida?

Aeromonas salmonicida is one of the widely studied fish pathogens for AMR. This is a Gram-negative, facultative anaerobic, nonmotile bacterium responsible for causing furunculosis in freshwater fish.

Is Aeromonas Gram positive or negative?

gram-negative rods
The genus Aeromonas consists of gram-negative rods widely distributed in freshwater, estuarine, and marine environments. Aeromonas species have been isolated with increasing frequency during warmer months. The organisms cause a wide spectrum of disease syndromes among warm and cold-blooded animals.

Is caused by bacteria Aeromonas salmonicida?