Hi. Any fever or sore throat with this? Are you saying he had a nasal swab for cultures? And he has yet to get any antibiotics?
Kenneth since you haven't been back let me answer and then if you need more information please just ask.
At this point he may have whooping cough, a bacterial bronchitis, or even pneumonia and the nasal tube may not have indicated any of these.
He needs to be seen again for a chest x-ray and a course of antibiotics since he hasn't gotten any better