Final answer:
Rhinitis is the inflammation of the nasal mucosa caused by allergies, viruses, and bacteria, which can lead to the combined condition of rhinosinusitis when it affects both the nasal mucosa and the paranasal sinuses.
Step-by-step explanation:
The inflammation of the nasal mucosa caused by allergies, viruses, and bacteria is known as rhinitis. This condition is often associated with viral infections such as the common cold, but can also be the result of bacteria like S. pneumoniae, H. influenzae, and M. catarrhalis, leading to a condition called bacterial rhinosinusitis. Rhinosinusitis involves the infection and inflammation of not only the nasal mucosa but also the paranasal sinuses. The primary symptoms related to rhinitis include sneezing, congestion, runny nose, and itchiness in the nose. Other related respiratory conditions that involve inflammation are sinusitis (inflammation of the sinuses), pharyngitis (sore throat), and laryngitis (inflammation of the larynx).