A 47-year-old male has been admitted for an elective repair…

A 47-year-old male has been admitted for an elective repair of symptomatic hiatal hernia. His past medical history is significant only for hypertension, which has been well controlled with an ACE inhibitor and thiazide diuretic. The ACNP is called to the bedside to evaluate an acute mental status change. Upon examination the patient is confused and lethargic. Assessment reveals no risk factors for delirium—no medications have been administered, there is no sign of infection, and SaO2 on 2 L nasal O2 is 99%. The only abnormal finding is a blood pressure of 182/140 mm Hg. The ACNP knows that management must include:

A microbiology student cultures Serratia marcescens on agar…

A microbiology student cultures Serratia marcescens on agar plates. When incubated at room temperature (25°C), the colonies appear red. When incubated at human body temperature (37°C), the colonies appear white or cream. The change in colony color observed under different temperature conditions is an example of a change in the organism’s what?