However, it’s a safe bet that a bacterial infection is present, because most of
us already have bacterial in our
upper respiratory tract. These bacteria, such as haemophilus influenzae and streptococcus pneumonae, don’t cause a problem when you are healthy, but after a cold virus infection clogs your nasal passages and weakens your body’s immune system, these germs are able to multiply and thrive.
Doctors usually prescribe antibiotics for 10 to 12 days in cases of acute sinusitis.