Q- Which one of the following tests is the most accurate for an infectious disease?
A- Antibiotic sensitivity test
B- Culture
C- Serum IgM level
D- Serum IgG level
B- Culture- It is the most confirmatory test for the organisms that grow in culture including staphylococci and streptococci.
Q- Which one of the following conditions needs prophylactic antibiotics before dental procedures?
A- History of arrhythmia
B- History of congestive heart failure
C- History of infective endocarditis
D- History of myocardial infarction
C- History of infective endocarditis- It is the only condition on the list that needs prophylactic antibiotics before any dental procedure. Other conditions that need prophylaxis are prosthetic valve and cyanotic congenital heart diseases.
Q- A patient presents with acute sinusitis for 3 days. Which of the following is the appropriate treatment of this patient?
A- Amoxicillin
B- Doxycycline
C- Cephalexin
D- Symptomatic treatment
D- Symptomatic treatment- Most cases of acute sinusitis are due to viral infection. Antibiotics are only used if symptoms persist or worsen for more than 7 days.
