Quiz 12 - Chapter 20 Micro

Which pigment produced by Pseudomonas aeruginosa contributes to its virulence and appears blue-green?

Pyocyanin

Which pathogen causes bacillary dysentery?

Shigella species

Pseudomonads are primarily found in what environments?

Soil, seawater, and freshwater

Which genus includes species that are important opportunistic pathogens, particularly affecting cystic fibrosis patients?

Burkholderia

E. coli is considered the most prevalent Gram-negative rod in which environment?

Human large intestine

Francisella tularensis is the causative agent of

Tularemia

Which strain of E. coli is primarily known for causing hemorrhagic colitis and hemolytic uremic syndrome (HUS)?

Enterohemorrhagic E. coli (EHEC) O157:H7

Klebsiella pneumoniae is frequently associated with what type of infection?

Pneumonia

Legionella species thrive in what type of environments?

Warm, stagnant water environments, like cooling towers and spas

The disease Legionnaires' disease is caused by

Legionella pneumophila

Shigella species are known for being:

Non-motile and non-spore-forming

Which characteristic is typical of Enterobacteriaceae?

Ferment glucose

What is the common name for the disease caused by Bordetella pertussis?

Whooping cough

What common test helps differentiate Enterobacteriaceae genera based on their metabolic properties?

Lactose fermentation

Yersinia pestis is the causative agent of what disease?

Plague

What is a key component of the outer membrane of Gram-negative rods that acts as an endotoxin, causing symptoms like fever and shock?

Lipopolysaccharide (LPS)

What is a primary reservoir for Salmonella species that can transmit the bacteria to humans?

Reptiles, poultry, and other animals

What term describes the characteristic fluctuating fever seen in brucellosis?

Undulant fever

What is a common vehicle for transmission of E. coli O157:H7?

Contaminated produce or undercooked ground beef

The O antigen of Enterobacteriaceae refers to a component of their:

Lipopolysaccharide (LPS) in the cell wall

A key virulence factor of Bordetella pertussis that helps it attach to host cells is

Filamentous hemagglutinin

What are common reservoirs and vectors for Francisella tularensis?

Rabbits, rodents, and ticks/ deer flies

Enterobacter species are commonly implicated in what type of infections, especially in hospitalized patients?

Hospital-acquired (nosocomial) infections, like UTIs and surgical site infections

To prevent salmonellosis, one should

Wash fruits and vegetables thoroughly, and cook meats completely

What is a significant clinical concern associated with Burkholderia cepacia in individuals with chronic respiratory infections like cystic fibrosis?

Increased antibiotic resistance and difficult-to-treat infections

Which genus is characterized by its notable "swarming" motility on agar?

Proteus

What is the primary vector for Yersinia pestis in the transmission cycle involving rodents?

Fleas

Brucellosis is a zoonosis primarily transmitted to humans through

Contact with infected animals or their products (e.g., milk, meat)

Pasteurella multocida is commonly associated with infections resulting from

Animal bites or scratches, particularly from cats and dogs

What common infection is caused by Haemophilus influenzae, particularly in children before the Hib vaccine?

Bacterial meningitis