A nurse is assisting with the care of several clients. The nurse should identify that which of the following client conditions requires contact precautions?

A. Hemophilus influenzae, which causes respiratory infections, generally requires droplet precautions, not contact precautions. B. Streptococcal pharyngitis is also typically managed with droplet precautions, not contact precautions. C. Clostridium difficile (C. diff) is a bacterial infection that causes severe diarrhea and gastrointestinal symptoms. It is spread through direct contact with contaminated surfaces or equipment, so contact precautions are necessary to prevent transmission. D. Mycoplasma pneumoniae, which causes respiratory infections, requires droplet precautions, not contact precautions.