30 Questions
What type of metabolism does P.aeruginosa have?
Oxidative and non-fermentative
Which medium is used to test the oxidative attack on sugars by P.aeruginosa?
Hugh and Leifson's medium with glucose
What is the resistance of P.aeruginosa to nitrites?
Resistance to nitrites
Which type of disinfectant is P.aeruginosa resistant to?
Quaternary ammonium compounds
What virulence factors does P.aeruginosa possess for establishing infection?
Flagella, pili, lipopolysaccharide (LPS), alginate
Why is adherence to host cells critical for establishing infection by P.aeruginosa?
To establish infection
What is the key consequence of LasA and LasB degrading elastin?
Damage to elastin-containing tissues
How do chronic Pseudomonas infections contribute to tissue damage?
Deposition of immune complexes in infected tissues
What is the role of alkaline protease in P.aeruginosa infections?
Contributing to tissue destruction and spread of bacteria
How does phospholipase C contribute to tissue destruction?
Breaks down lipids and lecithin, facilitating tissue destruction
What is the main effect of Exoenzymes S and T when introduced into target eukaryotic cells?
Cause epithelial cell damage facilitating bacterial spread
What is the potential severity range of Pseudomonas lower respiratory tract infections?
Asymptomatic colonization to severe necrotizing bronchopneumonia
What is one of the main reasons for the prominent role of Pseudomonas aeruginosa in hospital infections?
Resistance to common antibiotics and antiseptics
In patients undergoing malignancy or immunosuppressive therapy, which conditions may occur due to Pseudomonas aeruginosa infection?
Septicemia and endocarditis
How does Pseudomonas aeruginosa acquire resistance to additional antibiotics?
Horizontal transfer of resistance genes
What equipment or articles in hospitals may be frequently contaminated by Pseudomonas aeruginosa?
Respirators and endoscopes
Under what circumstances may fecal carriage of Pseudomonas aeruginosa be more frequent?
Following oral antibiotic treatment
What is one of the main mechanisms contributing to Pseudomonas aeruginosa's antibiotic resistance?
Rapid efflux of antibiotics due to intrinsic regulation of efflux pumps
What type of infections can Pseudomonas aeruginosa cause in people with frequently wet hands?
Fingernail infections
What type of foot condition is commonly caused by P. aeruginosa after a penetrating injury?
Osteochondritis
In what type of patients are urinary tract infections caused by P. aeruginosa commonly seen?
Patients with long-term indwelling urinary catheters
What type of ear infection is frequently caused by P. aeruginosa, with swimming as an important risk factor?
External otitis
What type of eye infection can P. aeruginosa cause after initial trauma to the cornea?
Corneal infections
What type of ear infection caused by P. aeruginosa can be life-threatening and requires aggressive treatment?
Malignant external otitis
What is the most common community-acquired infection caused by P. aeruginosa?
Suppurative otitis
Which characteristic skin lesions may develop in rare cases due to P. aeruginosa infections?
Ecthyma gangrenosum
Why is it important to recognize the epidemiological importance of P. aeruginosa as a disease-causing agent?
To prevent nosocomial infections
In neutropenic patients with P. aeruginosa infections, what is the expected finding in terms of neutrophils in microscopic examination of lesions?
Absence of neutrophils
Which of the following is NOT a common risk factor for developing P. aeruginosa infections?
Hypertension
What type of infection is most common and serious in burns due to P. aeruginosa?
Wound infections
Test your knowledge on bacterial pigments and biochemical reactions, including the inhibitory effects of pyocyanin, oxidative metabolism, and non-fermentative pathways. This quiz covers catalase, cytochrome oxidase, motility, sugar utilization, and nitrate reduction in bacteria.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
