In troduc tion For a better understanding of the pathogenic mechanismof infectious diseases it is important to know the molecular basis of how the host responds to microbial pathogens and eliminates them. Recent advances in immunology and molecular biology have led to the discovery of a large number of cytokines and cell surface molecules, which allows us to understand such pathogenic mechanism...

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 ...

Background and Aims: The role of BK and JC polyomaviruses (BKV and JCV) in the causation of respiratory disease and the natural route of transmission has not well been established. The aim of study was to determine the prevalence of BK and JC viruses in 280 respiratory samples and evaluate their contribution to respiratory disease. Materials and Methods: PCR was used to screen specimens for BK...

Background: Moraxella catarrhalis is Gram negative diplococci which is a member of Neisseriacae. It was considered as a harmless commensal of the upper respiratory tract. Since 1990 its pathogenecity was established and known as a common cause of respiratory infection, particularly otitis media, sinusitis and lower respiratory tract. The aim of this research was to determine the prevalence and ...

cryptosporial and bacterial co-infection is reported in a budgerigar with clinical manifestations of septicemia and respiratory tract infection. microscopically large number of round to oval 2-5μm cryptosporidial organisms were found to be lodged on the parabronchial epithelial cells of the respiratory tract. the bacterial colonies were seen around the parabronchial spaces of the lung tissue. i...

conclusions although several studies have investigated viral respiratory co-infection, no study has evaluated the rate of respiratory co-infections in adenovirus-positive samples from children younger than 5 years. however, this study has filled this gap, the the number of co-infections were too small to draw any definite conclusions. therefore, large-scale studies using bigger samples are requ...

conclusions infection with hmpv and rsv are most frequent infections among pediatric patients with respiratory tract symptoms. coinfection with these viruses may exacerbate the clinical symptoms and increase hospitalization rates, especially in children younger than one year old. results the hmpv and rsv were detected in 44 (15.7%) and 84 (30.0%) samples, respectively. coinfection with both vir...