Questions and Answers
Which shape of bacteria is associated with pus formation and can appear in clusters?
What type of bacteria are known for causing diseases such as pneumonia?
Which type of bacteria typically does NOT demonstrate self-movement?
Which of the following bacteria have a corkscrew shape?
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What do Bacilli and Spirilla use for locomotion?
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What is the term used for the self-movement of bacteria?
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Which of the following diseases is caused by Spirilla?
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Which type of bacteria are shorter and rod-shaped?
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How do bacteria with flagella move?
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What kind of bacteria are arranged in curved lines resembling a string of beads?
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Study Notes
Classifications of Pathogenic Bacteria
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Bacteria are classified into three main shapes: cocci, bacilli, and spirilla.
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Cocci (round-shaped bacteria) can exist singly or in clusters:
- Staphylococci: Form clusters; can cause abscesses, pustules, and boils. Some staph strains may be harmless in healthy individuals, while others can be deadly.
- Streptococci: Arranged in chains; responsible for infections like strep throat and blood poisoning.
- Diplococci: Grow in pairs; associated with diseases such as pneumonia.
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Bacilli: Rod-shaped bacteria, the most common type; can lead to diseases like:
- Tetanus (lockjaw)
- Typhoid fever
- Tuberculosis
- Diphtheria
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Spirilla: Spiral or corkscrew-shaped bacteria, with categories including:
- Treponema pallidum: Causes syphilis, a sexually transmitted infection.
- Borrelia burgdorferi: Causes Lyme disease.
Movement of Bacteria
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Motility: Refers to the self-movement of bacteria.
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Cocci generally lack motility; they are often transmitted via air, dust, or other substances.
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Bacilli and spirilla exhibit movement through:
- Flagella: Long, hairlike extensions allowing snakelike motion.
- Cilia: Shorter extensions that provide a rowing-like motion; require a higher quantity for effective movement.
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Movement mechanics differ:
- Flagella promote a smooth, snakelike motion.
- Cilia provide more of a coordinated rowing action.
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Description
Explore the classifications of pathogenic bacteria based on their shapes. This quiz covers details about cocci, specifically staphylococci, including their characteristics and the infections they can cause. Understand the importance of bacteriological classification in microbiology.
