Osteomyelitis MCQs

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 28, 2024

What is the most common organism responsible for osteomyelitis in children?
A) Staphylococcus aureus
B) Streptococcus pneumoniae
C) Escherichia coli
D) Haemophilus influenzae
Answer: A) Staphylococcus aureus

Which type of osteomyelitis occurs due to hematogenous spread?
A) Acute hematogenous osteomyelitis
B) Chronic osteomyelitis
C) Contiguous osteomyelitis
D) Post-traumatic osteomyelitis
Answer: A) Acute hematogenous osteomyelitis

What is the primary route of infection in hematogenous osteomyelitis?
A) Direct inoculation
B) Contiguous spread from adjacent tissues
C) Bloodstream
D) Surgical procedures
Answer: C) Bloodstream

In adults, which organism is commonly associated with osteomyelitis following a puncture wound?
A) Pseudomonas aeruginosa
B) Staphylococcus epidermidis
C) Streptococcus pyogenes
D) Clostridium perfringens
Answer: A) Pseudomonas aeruginosa

Which imaging modality is most useful for early detection of osteomyelitis?
A) X-ray
B) MRI
C) CT scan
D) Ultrasound
Answer: B) MRI

What is the gold standard for diagnosing osteomyelitis?
A) Blood cultures
B) Bone biopsy
C) MRI findings
D) Clinical symptoms
Answer: B) Bone biopsy

Which of the following is a risk factor for developing septic arthritis?
A) Age over 50
B) Previous joint surgery
C) Diabetes mellitus
D) All of the above
Answer: D) All of the above

What is the most common pathogen associated with septic arthritis in adults?
A) Streptococcus pneumoniae
B) Staphylococcus aureus
C) Neisseria gonorrhoeae
D) Escherichia coli
Answer: B) Staphylococcus aureus

What is the typical presentation of septic arthritis?
A) Pain and swelling in multiple joints
B) Asymptomatic
C) Sudden onset of pain, swelling, and fever in a single joint
D) Chronic joint pain without swelling
Answer: C) Sudden onset of pain, swelling, and fever in a single joint

Which joint is most commonly affected by septic arthritis in adults?
A) Hip
B) Shoulder
C) Knee
D) Ankle
Answer: C) Knee

What is the initial treatment for septic arthritis?
A) Oral antibiotics
B) Intravenous antibiotics and joint drainage
C) Rest and ice
D) Surgical intervention
Answer: B) Intravenous antibiotics and joint drainage

What is the significance of synovial fluid analysis in suspected septic arthritis?
A) To determine joint mobility
B) To identify pathogens and white blood cell count
C) To assess cartilage damage
D) To measure joint temperature
Answer: B) To identify pathogens and white blood cell count

In chronic osteomyelitis, what is a common feature seen on imaging?
A) Soft tissue swelling
B) Periosteal reaction
C) Lytic bone lesions
D) Normal bone appearance
Answer: C) Lytic bone lesions

Which patient population is at higher risk for osteomyelitis due to diabetes?
A) Children
B) Middle-aged women
C) Elderly patients
D) Athletes
Answer: C) Elderly patients

What is a common complication of septic arthritis?
A) Bone necrosis
B) Muscle atrophy
C) Tendon rupture
D) All of the above
Answer: A) Bone necrosis

What laboratory test is most helpful in diagnosing osteomyelitis?
A) Erythrocyte sedimentation rate (ESR)
B) Complete blood count (CBC)
C) C-reactive protein (CRP)
D) Blood cultures
Answer: D) Blood cultures

Which of the following can lead to contiguous osteomyelitis?
A) Skin infection
B) Trauma or surgery
C) Diabetes
D) All of the above
Answer: D) All of the above

What is the typical duration of antibiotic therapy for osteomyelitis?
A) 3-5 days
B) 7-10 days
C) 4-6 weeks
D) 2-3 months
Answer: C) 4-6 weeks

Which of the following factors does NOT increase the risk of osteomyelitis?
A) Immunosuppression
B) Poor nutrition
C) Regular exercise
D) Chronic diseases
Answer: C) Regular exercise

What is the primary treatment goal for osteomyelitis?
A) Pain relief
B) Cure the infection and preserve bone function
C) Reduce inflammation
D) Enhance physical therapy
Answer: B) Cure the infection and preserve bone function

Which antibiotic is often used as the first-line treatment for community-acquired osteomyelitis?
A) Vancomycin
B) Cefazolin
C) Clindamycin
D) Ampicillin
Answer: B) Cefazolin

What is the primary risk factor for developing chronic osteomyelitis?
A) Uncontrolled diabetes
B) Participation in contact sports
C) Family history of infections
D) Adequate hydration
Answer: A) Uncontrolled diabetes

In which age group is osteomyelitis most common?
A) Infants
B) Adolescents
C) Adults
D) Elderly
Answer: A) Infants

What is a characteristic feature of the joint effusion in septic arthritis?
A) Clear and colorless
B) Cloudy and purulent
C) Thick and gelatinous
D) None of the above
Answer: B) Cloudy and purulent

What is the significance of bone scanning in osteomyelitis?
A) It provides detailed imaging of soft tissues
B) It can detect metabolic activity in bone
C) It is the first line of diagnosis
D) It is not useful
Answer: B) It can detect metabolic activity in bone

Which type of bone is most commonly affected by osteomyelitis?
A) Flat bones
B) Long bones
C) Short bones
D) Irregular bones
Answer: B) Long bones

What is a common finding in a patient with chronic osteomyelitis?
A) Healthy granulation tissue
B) Necrotic bone or sequestrum
C) Absence of infection
D) Minimal inflammation
Answer: B) Necrotic bone or sequestrum

Which of the following is NOT a common complication of osteomyelitis?
A) Abscess formation
B) Osteosarcoma
C) Pathologic fractures
D) Chronic pain
Answer: B) Osteosarcoma

What is the primary cause of osteomyelitis in intravenous drug users?
A) Bacterial infection from contaminated needles
B) Viral infection
C) Fungus
D) Autoimmune response
Answer: A) Bacterial infection from contaminated needles

In the context of bone infections, what does the term “sequestrum” refer to?
A) Infected bone
B) Dead bone that separates from living bone
C) Inflamed soft tissue
D) Abscess
Answer: B) Dead bone that separates from living bone

Which of the following is a potential consequence of untreated septic arthritis?
A) Complete recovery
B) Joint destruction and chronic pain
C) Improved joint function
D) None of the above
Answer: B) Joint destruction and chronic pain

What role does debridement play in the treatment of chronic osteomyelitis?
A) It is unnecessary
B) It helps remove necrotic tissue and infected bone
C) It only provides temporary relief
D) It is used as a last resort
Answer: B) It helps remove necrotic tissue and infected bone

Which imaging technique is preferred for diagnosing joint infections?
A) X-ray
B) MRI
C) Ultrasound
D) CT scan
Answer: B) MRI

What is the common laboratory finding in a patient with septic arthritis?
A) Elevated liver enzymes
B) Increased white blood cell count
C) Decreased hemoglobin
D) Normal blood tests
Answer: B) Increased white blood cell count

How does diabetes mellitus contribute to the risk of bone and joint infections?
A) It enhances immune function
B) It promotes better blood circulation
C) It impairs wound healing and increases susceptibility
D) It has no effect on infections
Answer: C) It impairs wound healing and increases susceptibility

Which organism is commonly responsible for osteomyelitis in patients with sickle cell disease?
A) Salmonella
B) Staphylococcus aureus
C) Escherichia coli
D) Streptococcus pneumoniae
Answer: A) Salmonella

 

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