Microbiology Quiz: Staphylococcus and Clostridia

A group of bacteria characterized by their thick cell wall, retaining crystal violet dye in a Gram stain test, and spherical shape.

Infections affecting the skin, often caused by bacteria, viruses, or fungi.

Microbes capable of causing disease

Infections caused by bacteria, like staphylococcus or streptococci.

Infections caused by viruses, such as herpes or measles, affecting skin or tissues

A bacterial infection caused by Staphylococcus aureus bacteria, leading to localized skin infections like abscesses.

A localized collection of pus in the skin or tissues.

An infection around a hair follicle.

A boil; a subcutaneous abscess around a foreign body.

A large, deep, multi-loculated skin infection.

Superficial, spreading skin lesion with crusts, common in children.

The steps by which a bacteria causes disease, including attachment, cell damage, and resistance to immune responses.

Disease caused by bacterial toxins without bacterial infection.

A Gram-positive bacterium, often found on the skin, identified by its grape-like clusters and positive coagulase test.

A test used to identify Staphylococcus aureus; a positive result indicates the bacterium's ability to clot plasma.

A group of bacteria characterized by large, blunt-ended rod shapes, spore production, and obligate anaerobe characteristics.

A type of Clostridia often found in the gut and soil; it produces several exotoxins and is a pathogen.

Microorganisms that require the absence of oxygen to survive.

Spores of Clostridia can survive harsh conditions like chemical disinfectants and even boiling.

Describes bacteria that retain the crystal violet stain in a Gram stain procedure.

A test used to determine if a bacteria produces the enzyme catalase.

The most important toxin in Clostridium perfringens, acting as a phospholipase C that damages cell membranes by causing lysis.

A cholesterol-dependent hemolysin and a virulence factor in Clostridium perfringens, important factor for bacteria to cause damage.

A small, heat-sensitive protein produced by Clostridium perfringens that disrupts ion transport in the intestines causing loss of fluid and intracellular proteins resulting in food poisoning.

Enzymes produced by Clostridium perfringens that break down tissue, promoting the spread of infection and causing tissue liquefaction.

A serious infection caused by Clostridium perfringens, where bacteria damage muscles resulting in gas buildup and tissue death.

A soft tissue infection that happens in the absence of oxygen.

A common illness caused by Clostridium perfringens, caused by enterotoxin and its effects on cells, resulting in fluid loss and symptoms related to poisoning.

A bacterium often found in animals, especially cats and dogs. It can cause infections in humans, primarily through bites or scratches.

Grows on blood agar plates, forming small, translucent colonies with no red blood cell destruction (non-hemolytic).

When viewed under a microscope, the bacteria appear stained at both ends, with the middle remaining unstained.

These bacteria are rod-shaped or branched, don't move (non-motile), are gram-positive, thrive in the absence of oxygen (anaerobe), produce hydrogen peroxide (positive catalase test), and can be cultured on blood agar.

This bacterium resides in the sebaceous glands of the skin, which produce oil (sebum).

This bacterium is a major contributor to acne, a common skin condition, especially in adolescents.

In addition to causing acne, this bacteria can also infect patients with medical devices, such as catheters.

The bacteria feed on sebum, causing a buildup of oil. The sebaceous gland continues to produce sebum, leading to more bacteria growth. This cycle results in excess bacteria and inflammation, causing acne lesions.

Painful, pus-filled bumps on the skin, often caused by Staphylococcus aureus. They usually have a central core of dead tissue called an eschar.

A serious infectious disease caused by the bacteria Bacillus anthracis. It can affect the skin, lungs, or digestive system.

The space in the chest between the lungs, containing the heart, trachea, esophagus, and major blood vessels.

An abnormal buildup of fluid in the space between the lungs and the chest wall (pleural space).

A type of cancer that affects the blood-forming cells in the bone marrow, often leading to a weakened immune system.

A rash characterized by small, fluid-filled blisters.

Cells with multiple nuclei, often seen in viral infections. They can be found in the skin lesions of certain viral diseases.

Structures found inside the nuclei of cells, often associated with viral infections.