Is hyperglycaemia an indication that someone is experiencing septic shock?

Not very specific: Hyperglycemia can be a sign of inflammation or systemic stress. This can be caused by many, many conditions, one of which can be septic shock. But, really any condition can also cause hyperglycemia: pneumonia, heart attack, stroke, blood clots, etc. So, it is not a good marker to tell if you have septic shock. Sometimes, however, HYPOglycemia (too low) can be associated with septic shock. FYI.