Question

A boy falls on the left shoulder joint and presents to the emergency department with shoulder pain. His left elbow is flexed and is supported by the right hand. Which bone might be most likely fractured?

• A. Staphylococcus aureus
• B. Escherichia
• C. Salmonella
• D. Streptococcus

Answer 1

The Correct Option is A

The scenario describes a typical presentation of a shoulder injury after a fall. When a person falls on the shoulder, various injuries can occur, but if the individual stands with the elbow flexed and supported by the opposite hand, it is suggestive of a clavicular fracture. The key elements in this case are:

1. Mechanism of Injury: A fall on the shoulder is a common cause of a clavicle fracture, particularly when the lateral side absorbs the impact.
2. Position of Elbow: The flexed elbow supported by the opposite hand represents a natural protective stance to reduce pain and prevent further displacement of the fracture.
3. Commonality of Clavicle Fractures: The clavicle, or collarbone, is one of the most frequently fractured bones in the body, particularly in falls or direct trauma to the shoulder.

In bacterial infections associated with bone injuries, Staphylococcus aureus is the most common pathogen causing osteomyelitis following a fracture or surgical intervention. In this context, it is important to note the infection risk post-fracture or as a complicating factor if the fracture pierces the skin (open fracture).

Given these points, Staphylococcus aureus would be a highly relevant bacterium regarding potential complications in such injuries, especially with possible surgical intervention or if an infection develops post-trauma.