What is the most common causative organism of septic arthritis in adults?
A) Staphylococcus aureus
B) Streptococcus pneumoniae
C) Neisseria gonorrhoeae
D) Escherichia coli
Answer: A) Staphylococcus aureus
Which joint is most commonly affected by septic arthritis?
A) Hip
B) Shoulder
C) Knee
D) Ankle
Answer: C) Knee
What is a classic symptom of septic arthritis?
A) Asymptomatic
B) Joint stiffness
C) Sudden onset of joint pain and swelling
D) Gradual joint pain
Answer: C) Sudden onset of joint pain and swelling
Which of the following is a key diagnostic tool for septic arthritis?
A) MRI
B) Ultrasound
C) Joint aspiration
D) Bone biopsy
Answer: C) Joint aspiration
What does a synovial fluid analysis in septic arthritis typically show?
A) Clear and viscous fluid
B) Cloudy fluid with elevated white blood cells
C) Normal fluid
D) Thick and gelatinous fluid
Answer: B) Cloudy fluid with elevated white blood cells
What is the primary treatment for septic arthritis?
A) Oral antibiotics
B) Intravenous antibiotics and joint drainage
C) Rest and immobilization
D) Steroid injections
Answer: B) Intravenous antibiotics and joint drainage
In which population is septic arthritis most common?
A) Infants
B) Elderly
C) Middle-aged adults
D) Athletes
Answer: B) Elderly
Which laboratory test is most indicative of infection in septic arthritis?
A) Complete blood count (CBC)
B) C-reactive protein (CRP)
C) Erythrocyte sedimentation rate (ESR)
D) Blood cultures
Answer: D) Blood cultures
What is the typical white blood cell count in synovial fluid for septic arthritis?
A) <2,000 cells/mm³
B) 2,000-10,000 cells/mm³
C) >50,000 cells/mm³
D) >100,000 cells/mm³
Answer: C) >50,000 cells/mm³
Which condition increases the risk of developing septic arthritis?
A) Good nutrition
B) Previous joint surgery
C) Regular exercise
D) Adequate hydration
Answer: B) Previous joint surgery
What is the most common complication of untreated septic arthritis?
A) Osteoarthritis
B) Joint destruction
C) Muscle atrophy
D) Osteoporosis
Answer: B) Joint destruction
Which type of arthritis is characterized by a sudden onset and severe joint pain?
A) Osteoarthritis
B) Rheumatoid arthritis
C) Septic arthritis
D) Gout
Answer: C) Septic arthritis
What is a risk factor for developing septic arthritis in drug users?
A) Use of clean needles
B) Use of multiple drugs
C) Poor hygiene
D) All of the above
Answer: C) Poor hygiene
Which of the following is NOT a typical sign of septic arthritis?
A) Swelling
B) Fever
C) Warmth over the joint
D) Cold sensation
Answer: D) Cold sensation
What is the initial management step for a patient with suspected septic arthritis?
A) MRI
B) Blood test
C) Joint aspiration
D) Pain medication
Answer: C) Joint aspiration
What role do antibiotics play in the treatment of septic arthritis?
A) They are not effective
B) They reduce inflammation only
C) They help eliminate the infection
D) They provide pain relief
Answer: C) They help eliminate the infection
What type of bacteria is commonly associated with sexually transmitted infections causing septic arthritis?
A) Escherichia coli
B) Neisseria gonorrhoeae
C) Staphylococcus epidermidis
D) Streptococcus pyogenes
Answer: B) Neisseria gonorrhoeae
Which of the following is a common laboratory finding in septic arthritis?
A) Decreased white blood cell count
B) Elevated white blood cell count
C) Normal white blood cell count
D) Elevated platelet count
Answer: B) Elevated white blood cell count
What imaging study can help detect joint effusion in septic arthritis?
A) X-ray
B) CT scan
C) MRI
D) Ultrasound
Answer: D) Ultrasound
What is a common cause of septic arthritis in patients with chronic diseases?
A) Viral infections
B) Bacterial infections
C) Fungal infections
D) Autoimmune disorders
Answer: B) Bacterial infections
In a patient with septic arthritis, what is the most appropriate course of action if the joint fluid is purulent?
A) Observation
B) Immediate surgical intervention
C) Oral antibiotics
D) Ice application
Answer: B) Immediate surgical intervention
What is the typical duration of antibiotic therapy for septic arthritis?
A) 3-5 days
B) 7-10 days
C) 2-4 weeks
D) 4-6 weeks
Answer: C) 2-4 weeks
Which type of arthritis can develop as a result of a joint infection from osteomyelitis?
A) Gout
B) Septic arthritis
C) Rheumatoid arthritis
D) Psoriatic arthritis
Answer: B) Septic arthritis
What is the significance of early intervention in septic arthritis?
A) It has no effect on the outcome
B) It can prevent joint damage and improve recovery
C) It is less effective than delayed intervention
D) It only helps reduce pain
Answer: B) It can prevent joint damage and improve recovery
In a patient with septic arthritis, what symptom suggests a potential complication?
A) Increased mobility
B) Persistent fever
C) Reduced joint swelling
D) Decreased pain
Answer: B) Persistent fever
What can be a source of infection leading to septic arthritis?
A) Urinary tract infection
B) Skin infection
C) Bloodstream infection
D) All of the above
Answer: D) All of the above
What is the most common method to confirm the diagnosis of septic arthritis?
A) X-ray findings
B) MRI results
C) Joint aspiration and fluid analysis
D) Blood tests
Answer: C) Joint aspiration and fluid analysis
Which patient group is at higher risk for developing septic arthritis due to compromised immune systems?
A) Young athletes
B) Individuals with diabetes
C) Pregnant women
D) Healthy adults
Answer: B) Individuals with diabetes
What is the expected synovial fluid color in cases of septic arthritis?
A) Clear
B) Straw-colored
C) Cloudy or purulent
D) Red
Answer: C) Cloudy or purulent
What complication can arise from delayed treatment of septic arthritis?
A) Improved joint function
B) Chronic pain and disability
C) Complete recovery without intervention
D) Increased joint flexibility
Answer: B) Chronic pain and disability
What is the best initial imaging study for a patient suspected of having septic arthritis?
A) MRI
B) X-ray
C) Ultrasound
D) CT scan
Answer: B) X-ray
What laboratory finding is often elevated in patients with septic arthritis?
A) Hemoglobin
B) Platelets
C) C-reactive protein (CRP)
D) Creatinine
Answer: C) C-reactive protein (CRP)
Which symptom is NOT typical of septic arthritis?
A) Severe joint pain
B) Joint instability
C) Fever
D) Constant fatigue
Answer: B) Joint instability
What is the most appropriate management for a patient with a confirmed diagnosis of septic arthritis?
A) Observation
B) Antibiotics and surgical intervention if needed
C) Rest and analgesics only
D) Joint injections with corticosteroids
Answer: B) Antibiotics and surgical intervention if needed
Which risk factor is associated with increased incidence of septic arthritis?
A) Regular exercise
B) Immunosuppression
C) Balanced diet
D) Good hydration
Answer: B) Immunosuppression
What is the typical onset pattern for septic arthritis?
A) Gradual onset over weeks
B) Sudden onset
C) Chronic with intermittent flare-ups
D) Constant mild pain
Answer: B) Sudden onset
What is the preferred method for confirming the causative organism in septic arthritis?
A) Blood cultures
B) Joint fluid culture
C) X-ray
D) MRI
Answer: B) Joint fluid culture
What laboratory test is commonly elevated in patients with septic arthritis?
A) Serum electrolytes
B) Liver function tests
C) Creatinine
D) White blood cell count
Answer: D) White blood cell count
Which symptom might indicate the presence of septic arthritis in a joint?
A) Increased flexibility
B) Decreased warmth
C) Localized tenderness
D) None of the above
Answer: C) Localized tenderness
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