A nurse is working with an emergency response team in caring for a group of people who may have been exposed to anthrax while doing farm work. Which of the following is the appropriate action for the nurse to take?

The correct answer is B: Administer antibiotic therapy. Anthrax is a bacterial infection that can be treated effectively with antibiotics such as ciprofloxacin or doxycycline. Administering antibiotics promptly can prevent the development of severe symptoms and improve the prognosis for those exposed. Treating clients with an antitoxin (choice A) is not the appropriate action as anthrax is caused by bacteria, not toxins. Initiating client decontamination (choice C) is important but not the immediate priority; administering antibiotics takes precedence. Placing clients in isolation (choice D) may be necessary to prevent the spread of infection but does not address the primary need for antibiotic treatment.