background and objectives: feline herpesvirus-1, feline calicivirus and chlamydophila felis are the main causes of feline upper respiratory tract disease. this study was conducted to identify of fehv-1, fcv and c. felis infections in domestic cat population and also to estimate the prevalence of each specific infection in iran. materials and methods: the ocular conjunctiva and oropharyngeal spe...

To test the hypothesis that an episode of upper respiratory tract infection or heterologous immunisation is a predisposing factor for the occurrence of meningococcal disease, data from 377 cases of meningococcal disease and their household contacts (n = 1124) were analysed by conditional logistic regression analysis with stratification for household. The odds ratio for a recent upper respirator...

according to statistical data from who, respiratory tract infections are among the most important health problems all over the world. differentiating viral from other causes of respiratory infections is difficult, but a good knowledge of viral etiologic factors can guide the physicians in the diagnosis and treatment of the disease. we carried out this descriptive, case-series study to evaluate ...

Granulomatosis with polyangiitis (Wegener's granulomatosis) is one of the anti-neutrophil cytoplasmic anti-body-associated small vessel vasculitides. Upper and lower respiratory system and kidneys are most commonly affected. The disease is characterized by granulomatous inflammation of the respiratory tract and necrotizing vasculitis of small to medium-sized blood vessels. Most patients show in...

The upper respiratory system includes the nose, nasal cavity, pharynx, and larynx with subglottic area of trachea. In the normal circumstances, air enters the respiratory system through nostrils where it is filtered, humidified, and warmed inside the nasal cavity. Conditioned air passes through pharynx, larynx, and trachea and then enters in lower respiratory system. Dysfunction of any part of ...