Vibrionales

Definition

Vibrionales is an order of Proteobacteria, characterized by a curved rod shape and commonly found in aquatic environments. Many species within this order are known for their pathogenicity in humans and marine life.

5 Must Know Facts For Your Next Test

1. Vibrionales includes the well-known genus Vibrio, which contains species like Vibrio cholerae, the causative agent of cholera.
2. Members of Vibrionales are typically Gram-negative bacteria with polar flagella, aiding in their motility.
3. These bacteria often thrive in marine or estuarine environments where they can be free-living or associated with host organisms.
4. Vibrio species can produce toxins that lead to severe gastrointestinal diseases in humans and other animals.
5. Bioluminescence is a notable feature in some Vibrionales species, such as Vibrio fischeri, which forms symbiotic relationships with certain marine animals.

Review Questions

• What genus within the order Vibrionales is responsible for causing cholera?
• Describe the typical habitat and physical characteristics of Vibrionales bacteria.
• How do some members of the order Vibrionales contribute to bioluminescence?

Related terms

Proteobacteria: A major phylum of Gram-negative bacteria that includes a wide variety of pathogens.

Cholera: An infectious disease caused by the bacterium Vibrio cholerae, leading to severe diarrhea and dehydration.

Bioluminescence: The production and emission of light by living organisms, commonly seen in some marine bacteria such as those in the genus Vibrio.