What is the typical diagnostic feature on stool culture for Campylobacter jejuni infection?

Campylobacter jejuni is known for its distinct morphology observed under a microscope, which is characterized by its seagull-shaped organisms. This shape is a classic diagnostic feature that helps differentiate Campylobacter infections from other gastrointestinal pathogens.

During stool culture and subsequent microscopic examination, the presence of these seagull-shaped bacilli is indicative of Campylobacter jejuni. This characteristic appearance aids in the identification of the organism, especially when conducting differential diagnoses in cases of gastroenteritis.

Other shapes such as comma-shaped organisms may refer to Vibrio species, while pink coloration is typically associated with certain other bacteria that do not pertain to Campylobacter. Spiral-shaped organisms are not specifically distinguishing for Campylobacter jejuni, as they may generally describe other types of bacteria without the distinctive seagull shape. Thus, the unique morphology of Campylobacter jejuni as seagull-shaped organisms is essential for accurate diagnosis in clinical settings.