Certified Surgical Technologist (CST) Practice Exam

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Study for the Certified Surgical Technologist Exam. Prepare with multiple choice questions, hints, and explanations. Enhance your understanding and boost your confidence for acing the exam!

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Which type of bacteria appears as rods in shape?

Spirilli
Cocci
Bacilli
Diplococci

The correct answer is: Bacilli

Bacilli refers to rod-shaped bacteria and is the correct answer to the question. This morphological classification derives from the Latin term "bacillus," meaning "little rod." Bacterial classification based on shape is fundamental in microbiology, helping with identification and understanding of various bacterial species. In contrast, spirilli describes bacteria that have a spiral or corkscrew shape, indicating a very different structural formation. Cocci refers to spherical-shaped bacteria, which can be single or arranged in different formations, such as chains or clusters. Diplococci specifically refers to cocci that occur in pairs, which is another distinct form that does not align with rod-shaped morphology. Understanding these distinctions is essential for anyone studying microbiology, as the shape can influence bacterial behavior, culture methods, and susceptibility to antibiotics.