Enterobacterales

Overview

Enterobacter sakazakii, a member of the Enterobacterales order

Enterobacterales is an order of Gram-negative bacteria that includes many well-known pathogens such as Escherichia coli, Salmonella, and Yersinia pestis. These bacteria are typically rod-shaped and are found in a variety of environments, including soil, water, and the intestines of animals.

Taxonomy

The order Enterobacterales belongs to the class Gammaproteobacteria. It encompasses several families, including:

• Enterobacteriaceae
• Yersiniaceae
• Morganellaceae
• Pectobacteriaceae

Characteristics

Members of the Enterobacterales are characterized by their ability to ferment glucose and other carbohydrates, often producing gas as a byproduct. They are facultative anaerobes, meaning they can grow in both the presence and absence of oxygen. These bacteria are oxidase-negative and catalase-positive.

Pathogenicity

Many Enterobacterales are significant pathogens in humans and animals. For example, Escherichia coli can cause urinary tract infections, gastroenteritis, and neonatal meningitis. Salmonella species are responsible for salmonellosis, a common cause of foodborne illness.

Clinical Importance

The Enterobacterales order includes bacteria that are important in both clinical and environmental contexts. In hospitals, these bacteria are often associated with nosocomial infections and are known for their ability to acquire antibiotic resistance.

Related Pages

• Escherichia coli
• Salmonella
• Yersinia pestis
• Antibiotic resistance