Test on Hand Infections: Diagnosis and Treatment

Question 1: Type II osteomyelitis is characterized by diffuse involvement of the bone and bone instability.

A. Ano

B. Ne

Explanation: Type II osteomyelitis involves the surface of the bone and is characterized by deficient overlying soft tissue. Diffuse involvement of the bone and instability are characteristics of Type IV osteomyelitis.

Question 2: Which advanced imaging studies are specifically mentioned as useful for identifying acute osteomyelitis in its early stages, particularly when standard radiographs appear normal?

A. Technetium-, gallium-, and indium-labeled WBC scans

B. MRI

C. Standard radiographs

D. CT scans

Explanation: The study materials state that 'Advanced imaging studies such as technetium-, gallium-, and indium-labeled WBC scans can be useful in identifying acute osteomyelitis. These studies are useful in the early stages of infection, when standard radiographs are normal.' While MRI is also discussed as a very useful study in the early presentation, the question specifically asks about studies useful when standard radiographs are normal, which is explicitly stated for the WBC scans. MRI's utility is highlighted for contrast and identifying necrotic bone, and for inconclusive findings or surgical planning, but not directly linked to being useful when standard radiographs are normal in the same way the WBC scans are.

Question 3: Is tularemia an infection typically associated with contact with rat feces?

A. Ano

B. Ne

Explanation: Tularemia is associated with rabbit handlers, while Streptobacillus moniliformis is associated with rat bites or contact with rat feces.

Question 4: Which of the following statements about marine organism infections are accurate?

A. Mycobacterium marinum infections typically present as acute conditions requiring immediate aggressive treatment.

B. Aeromonas species infections, especially those from fresh or brackish water, are associated with a high mortality rate, even with aggressive surgical management.

C. Non-cholerae Vibrio infections, such as those caused by V. vulnificus, are commonly associated with raw seafood ingestion and often affect individuals with underlying liver disease.

D. Envenomation from certain fish, like catfish, can cause immediate severe throbbing pain, muscle spasms, and potentially local skin necrosis.

Explanation: Mycobacterium marinum generally presents as a chronic infection, not an acute one. Aeromonas species infections, particularly from fresh or brackish water, have a mortality rate of up to 27% despite aggressive surgical management. Non-cholerae Vibrio infections are primarily septicemia acquired through the ingestion of raw seafood, typically in patients with underlying liver disease or other immunocompromising disorders. Envenomation from fish like catfish can indeed cause immediate severe throbbing pain, muscle spasm, fasciculations, and potentially local skin necrosis and slough.

Question 5: Infections of the skin and soft tissues are among the most commonly encountered complications of intravenous drug abuse.

A. Ano

B. Ne

Explanation: The study materials state, "One of the most commonly encountered complications of intravenous drug abuse is infections of the skin and soft tissues."