29 Questions
What is the first step in molecular diagnostics for identifying microorganisms?
DNA/RNA Extraction
What is the main difference between gingivitis and periodontitis?
The severity of inflammation
Which technique is used to monitor disease and decide on individualized therapies in medicine?
Molecular Diagnostics
Why are dental infections rarely life-threatening today?
Improved Dental Hygiene
What causes a dental abscess?
A build-up of pus due to an infection
What is the main characteristic of prokaryotes?
They lack membrane-bound organelles
What is the function of the flagellum in prokaryotes?
It provides structural background for chemotaxis
What is the role of the cell wall in prokaryotes?
It protects the bacterial cell and gives it shape
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
What is the role of the cytoplasm in prokaryotes?
It is a gel-like substance containing various cellular components
What happens during the lag phase of the bacterial growth curve?
Bacteria try to adapt to the environment
Which of the following statements about Staphylococcus lugdunensis is true?
It is negative for both slide and tube coagulase tests.
Which of the following statements about Micrococci is incorrect?
They are coagulase-positive and produce pigmented colonies.
Which of the following is a characteristic of Streptococci?
They divide in one direction, forming chains.
Which of the following is a pyogenic Streptococcus?
Streptococcus pyogenes
Which of the following Streptococci is part of the viridans group?
Streptococcus bovis
Which of the following is an example of a viridans Streptococcus?
Streptococcus salivarius
What is the timeframe for the development of late-onset disease in neonates?
Between 1 week and 3 months of age
Which group of streptococci is most prevalent on the pits and fissures in the oral cavity?
Mutans group
Which streptococcal group can be divided into anginosus, mitis, mutans, and salivarius groups?
Oral streptococci
Which streptococcal species can contribute to oral diseases along with S. sobrinus?
S. mutans
Which streptococcus typically shows α-hemolysis on blood agar?
S. mitis
What is the primary organism involved in dental caries?
Streptococcus mutans
Which of the following is a way that pneumoniae can spread into the central nervous system?
Through the bloodstream after bacteremia
What is usually the precursor to the disease caused by pneumoniae?
A viral infection of the upper respiratory tract
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
What is a common characteristic of the destruction of valve tissue in endocarditis?
It is common
What is the predominant end product of glucose fermentation by the enterococci?
Lactic acid
Which of the following antibiotics is used to treat antibiotic-resistant enterococcal infections?
Daptomycin, Linezolid, Streptogramins, Tigecycline
Test your knowledge of bacteriology with this quiz by Dogukan Ozbey from the Medical Faculty, Department of Medical Microbiology. Learn about prokaryotes, their characteristics, molecular analysis, domains, flagellum, plasmid, and cell membrane.
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