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Campylobacter Genus and Morphology

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Questions and Answers

What is the most important species related to genus Campylobacter?

Campylobacter fetus

Campylobacter lari

Campylobacter jejuni (correct)

Campylobacter coli

How do Campylobacters appear morphologically?

Curved, Gram-negative rods that are comma- or S-shaped and motile with monotrichous flagellum (correct)

Straight, Gram-negative rods that are comma- or S-shaped and motile with amphitrichous flagellum

Curved, Gram-negative cocci that are spiral-shaped and non-motile

Straight, Gram-positive rods that are spiral-shaped and motile with peritrichous flagellum

What is the leading cause of campylobacteriosis?

Campylobacter jejuni (correct)

Campylobacter coli

Campylobacter fetus

Campylobacter lari

Where do Campylobacters grow best?

In 5% oxygen rather than in the 20% present in the atmosphere Signup and view all the answers

What is the usual mode of transmission for Campylobacter infection?

Fecal–oral through food and water contaminated with animal feces Signup and view all the answers

What is the morphology of Campylobacters?

Curved, Gram-negative rods with either comma- or S-shape, and motile with monotrichous flagellum Signup and view all the answers

What is the leading cause of campylobacteriosis?

Campylobacter jejuni Signup and view all the answers

How is Campylobacter infection primarily transmitted to humans?

Fecal-oral route through contaminated food and water or direct contact with infected animals Signup and view all the answers

What is the clinical presentation of Campylobacter jejuni infection in humans?

Inflammatory, bloody diarrhea or dysentery syndrome, including cramps, fever and pain Signup and view all the answers

What is the preferred oxygen concentration for the growth of Campylobacters?

5% Signup and view all the answers

Study Notes

Key Species and Characteristics

Campylobacter jejuni is the most prominent species within the genus Campylobacter.
Campylobacters are characterized morphologically as spiral-shaped or curved rods.

Growth and Environment

Optimal growth conditions for Campylobacters are at temperatures around 42°C, resembling avian body temperature.
They prefer microaerophilic conditions, with an oxygen concentration of about 5-10%.

Transmission and Infection

Campylobacteriosis is primarily caused by the ingestion of contaminated food, particularly undercooked poultry.
Common transmission routes include consumption of contaminated water or unpasteurized dairy products.
Campylobacter infection typically presents as gastroenteritis with symptoms such as diarrhea, abdominal pain, fever, and nausea.

Clinical Presentation

Infection with Campylobacter jejuni can lead to severe diarrhea, which may be bloody, and abdominal cramps.
The illness often resolves within a week but can lead to complications in some cases.

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Description

Test your knowledge on the genus Campylobacter and its morphology, including its curved, Gram-negative rods and microaerophilic nature. Explore the pathogenesis and clinical findings associated with Campylobacter jejuni.