Bacteriology-1 Quiz with Dogukan Ozbey

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What is the first step in molecular diagnostics for identifying microorganisms?

Sequencing

Electrophoresis

DNA/RNA Extraction (correct)

Protein Amplification

What is the main difference between gingivitis and periodontitis?

The bacterial strains causing them

The type of treatment needed

The severity of inflammation (correct)

The location of infection

Which technique is used to monitor disease and decide on individualized therapies in medicine?

Nucleic Acid Amplification

Polymerase Chain Reaction (PCR)

Molecular Diagnostics (correct)

Electrophoresis

Why are dental infections rarely life-threatening today?

Improved Dental Hygiene Signup and view all the answers

What causes a dental abscess?

A build-up of pus due to an infection Signup and view all the answers

What is the main characteristic of prokaryotes?

They lack membrane-bound organelles Signup and view all the answers

What is the function of the flagellum in prokaryotes?

It provides structural background for chemotaxis Signup and view all the answers

What is the role of the cell wall in prokaryotes?

It protects the bacterial cell and gives it shape Signup and view all the answers

Which of the following is a characteristic of binary fission?

It results in the reproduction of a living prokaryotic cell by dividing it into two parts Signup and view all the answers

What is the role of the cytoplasm in prokaryotes?

It is a gel-like substance containing various cellular components Signup and view all the answers

What happens during the lag phase of the bacterial growth curve?

Bacteria try to adapt to the environment Signup and view all the answers

Which of the following statements about Staphylococcus lugdunensis is true?

It is negative for both slide and tube coagulase tests. Signup and view all the answers

Which of the following statements about Micrococci is incorrect?

They are coagulase-positive and produce pigmented colonies. Signup and view all the answers

Which of the following is a characteristic of Streptococci?

They divide in one direction, forming chains. Signup and view all the answers

Which of the following is a pyogenic Streptococcus?

Streptococcus pyogenes Signup and view all the answers

Which of the following Streptococci is part of the viridans group?

Streptococcus bovis Signup and view all the answers

Which of the following is an example of a viridans Streptococcus?

Streptococcus salivarius Signup and view all the answers

What is the timeframe for the development of late-onset disease in neonates?

Between 1 week and 3 months of age Signup and view all the answers

Which group of streptococci is most prevalent on the pits and fissures in the oral cavity?

Mutans group Signup and view all the answers

Which streptococcal group can be divided into anginosus, mitis, mutans, and salivarius groups?

Oral streptococci Signup and view all the answers

Which streptococcal species can contribute to oral diseases along with S. sobrinus?

S. mutans Signup and view all the answers

Which streptococcus typically shows α-hemolysis on blood agar?

S. mitis Signup and view all the answers

What is the primary organism involved in dental caries?

Streptococcus mutans Signup and view all the answers

Which of the following is a way that pneumoniae can spread into the central nervous system?

Through the bloodstream after bacteremia Signup and view all the answers

What is usually the precursor to the disease caused by pneumoniae?

A viral infection of the upper respiratory tract Signup and view all the answers

Which of the following is true about the presence of bacteria in the blood of patients with sinusitis or otitis media?

Bacteria are generally not present in the blood Signup and view all the answers

What is a common characteristic of the destruction of valve tissue in endocarditis?

It is common Signup and view all the answers

What is the predominant end product of glucose fermentation by the enterococci?

Lactic acid Signup and view all the answers

Which of the following antibiotics is used to treat antibiotic-resistant enterococcal infections?

Daptomycin, Linezolid, Streptogramins, Tigecycline Signup and view all the answers