... to three weeks after the onset of coughing episodes. The period of communicability is reduced to five days when antibiotic therapy is begun. What can be done to prevent the spread of pertussis? The single most effective control measure is maintaining ...

... those patients tested, 98 percent had initial negative or undetermined results, but 78 of the patients received antibiotic therapy. None of the patients with tick bites developed Lyme disease. Blood tests were ordered for 90 percent of the patients ...