Which organism is Gram-positive rods with terminal spores and slender filaments?

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Multiple Choice

Which organism is Gram-positive rods with terminal spores and slender filaments?

The key idea is recognizing a spore-forming, Gram-positive rod with endospores positioned at the ends of the cell. Clostridium tetani fits this description: it forms endospores that are terminal, giving a distinctive drumstick-like appearance, and the cells are slender Gram-positive rods. This combination of Gram-positive rod morphology with terminal spores is characteristic and helps distinguish it from others. Actinomyces is Gram-positive but forms branching filamentous structures and does not produce true endospores. Streptococcus gallolyticus is a Gram-positive coccus, not a rod. Alcaligenes faecalis is a Gram-negative rod, not a Gram-positive spore-former.

The key idea is recognizing a spore-forming, Gram-positive rod with endospores positioned at the ends of the cell. Clostridium tetani fits this description: it forms endospores that are terminal, giving a distinctive drumstick-like appearance, and the cells are slender Gram-positive rods. This combination of Gram-positive rod morphology with terminal spores is characteristic and helps distinguish it from others.

Actinomyces is Gram-positive but forms branching filamentous structures and does not produce true endospores. Streptococcus gallolyticus is a Gram-positive coccus, not a rod. Alcaligenes faecalis is a Gram-negative rod, not a Gram-positive spore-former.

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