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Vibrio harveyi

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A gram-negative rod-shaped motile and facultatively anaerobic bioluminescent marine bacterium involved in marine animals infections including eye-lesions, vasculitis, gastro-enteritis and luminous vibriosis.


Vibrio harveyi is a monotrichous that move with a single polar flagellum which consists of two membranes an outer membrane lipopolysaccharide and inner cytoplasmic membrane. It is the one accountable with luminous vibrios, a certain disease that mostly affects commercially farmed prawns where it enters through the mouth forming plagues and spread to appendages causing limbs degradation.

Vibrio harveyi is a halophilic that is capable for both fermentative and respiratory metabolism which does not grow at temperature below 4’C or beyond 35’C. It is found as a free swimming bacterium at tropical marine waters and acts as commensal in the gut microflora of marine animals. It is also caused both primary and opportunistic pathogens of marine animals including oysters, corals, lobsters, prawns, seahorse, common snook, barramundi and milkfish.

Vibrio harveyi has been demonstrated to form quorum sensing and acts as free-living that does not form symbiotic relationships but serves as a common pathogen to many marine organisms. Its cell to cell communication ability releases autoinducers.

Scientific classification:

 Kingdom: Bacteria
 Phylum: Proteobacteria
 Class: Gammaproteobacteria
 Order: Vibrionales
 Family: Vibrionaceae
 Genus: Vibrio
 Species: Vibrio harveyi 

See also:

• Bacteria

• Vibriosis

• Bioluminescent