Final answer:
A nurse should instruct a mother to administer oral nystatin suspension for thrush by mixing it with formula and administering it by bottle.
Step-by-step explanation:
Oral thrush, also known as oral candidiasis, is a fungal infection caused by the overgrowth of Candida yeast in the mouth. Candida is a type of fungus that is normally present in small amounts in the oral cavity, digestive tract, and other mucous membranes. However, under certain conditions, such as a weakened immune system or disruptions in the balance of microorganisms in the mouth, Candida can multiply, leading to an infection.
A nurse should instruct a mother to administer oral nystatin suspension for thrush by mixing it with formula and administering it by bottle. This method ensures that the medication reaches all areas of the mouth and helps to eliminate the infection.