Which organism is described as having a capsule in the material?

Prepare for the AAMI Microbiology exam for embalmers with our comprehensive quiz. Use flashcards and multiple-choice questions with explanations and hints to master exam content and enhance your study experience.

Capsules are polysaccharide coats that surround some bacteria and help them resist being eaten by immune cells. Streptococcus pneumoniae is the classic encapsulated organism described in material like tissue samples or clinical smears. Its capsule surrounds the Gram-positive diplococcus and is a defining virulence factor, often detected with capsule-staining methods or the quellung reaction. This capsule not only helps the organism evade phagocytosis but also gives a recognizable encapsulated appearance in prepared material, making it the best clue in this context. Other organisms can have capsules, but the capsule of Pneumococcus is the most characteristic feature highlighted for identifying encapsulated bacteria in this scenario.