Middle meatal samples were obtained from 52 carefully selected healthy adults. In 75 per cent of the test subjects bacterial organisms were cultured. However, growth was often poor and the predominant species suggest a commensal flora: coagulase-negative staphylococci were retrieved from 35 per cent, Corynebacterium sp. from 23 per cent and Staphyloccus aureus from eight per cent of the adults. These data are very different from those previously obtained among children where--even in the absence of obvious ENT pathology--the most frequently cultured organisms were typical sinusitis pathogens: Haemophilus influenzae present in 40 per cent, Moraxella catarrhalis in 34 per cent and Streptococcus pneumoniae in 50 per cent of children. Furthermore, Streptococcus viridans and Neisseria sp., both organisms that might be able to inhibit colonization by some of the pathogens and found commonly among children, are virtually absent in healthy adults.

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Objective tests for the nasal volume flow are needed for the assessment of nasal patency for diagnosis, documentation and medicolegal purposes. Three main techniques are nowadays established: active anterior rhinomanometry (AAR), 4-phase rhinomanometry (4PR) and acoustic rhinometry (AR). Several guidelines and consensus reports and the International Committee on Standardization have clarified the field of interest and the limitations of this technology. In the meantime, technical progress and the development of seemingly new methods have brought up many new facts which necessitate the re-evaluation of the test available. From our method of critical analysis we can conclude that AAR can be still considered as the standard technique for the objective assessment of the nasal airway. AR is a valid technique with limitations and cannot replace AAR because it measures different parameters thus forming a complementary technique. 4PR might provide supplementary information although not yet all open technical and mathematical inconsistencies conjoint with this technique have been clarified. Still the individual subjective sensations of the patient do not always match the objective measurements. In conclusion, a combination of information given by the patient, the rhinoscopic findings and the carefully interpreted results of AAR and AR will increase considerably the success of surgical interventions and the feeling of satisfaction by the patient after surgery, when matched thoughtfully.

Allergic rhinitis (AR) affects 23–30% of the European population with equal prevalence reported in Belgium. Despite guidelines on the correct use of effective treatment, up to 40% of AR patients remain uncontrolled. Allergen immunotherapy (AIT) has been shown to improve the level of control up to 84% of patients being controlled by AIT. Recently, new guidelines for AIT have been published, supporting the clinical evidence for effectiveness of various subcutaneous and sublingual products for AIT in patients who are allergic to airborne allergens. AIT in AR patients not only reduces nasal and/or ocular symptoms but also induces tolerance and has preventive potential. Adoption of AIT into daily clinical practice in Belgium and other European countries is hampered primarily by reimbursement issues of each of the single products but also by several patient- and physician-related factors. Patients need to be better informed about the effectiveness of AIT and the different routes of administration of AIT. Physicians dealing with AR patients should inform patients on tolerance-inducing effects of AIT and are in the need of a harmonized and practical guide that supports them in selecting eligible patients for AIT, in choosing evidence-based AIT products and in following treatment protocols with proven efficacy. Therefore, a stepwise and holistic approach is needed for better adoption of AIT in the real-life setting in Belgium.