background: to investigate the prevalence of antibiotic usage in children aged <5 years with acute respiratory tract illness (arti) in iran. materials and methods: data were collected from a national health survey conducted in 2010 (iran’s multiple indicator demographic and health survey). participants of this cross-sectional study were selected by multistage stratifi ed cluster-random sampling...

Background: The airway surfaces are one of the most common ways of entry of infectious agents. Oral cavity associated lymphoid tissues are inductive site of humoral immune responses in inflammatory and infectious disorders of the upper respiratory tract. These lymphoid tissues play important roles in the induction of salivary IgA. The impact of upper respiratory tract diseases on salivary IgA p...

feline herpesvirus 1 (fehv-1) and feline calicivirus (fcv), associated with upper respiratory tract disease, are highly prevalent in cats worldwide. with the aim of investigating the importance of fehv-1 in a population of cats, samples were taken in a hospital in ahvaz, south-west iran, between june 2007 and june 2008. oropharyngeal, nasal and ocular swabs were collected from 65 domestic cats,...

background: considering that there was not any regional survey in isfahan, iran regarding the epidemiology of acute respiratory tract infections (arti) in different age groups of general population, the aim of this study was to determine the epidemiologic feature of artis in isfahan using multiplex polymerase chain reaction (pcr) method. materials and methods: in this cross-sectional study,pati...

background: respiratory diseases/syndromes are the most common causes of referring to physicians among pilgrims in hajj . they lead to high morbidity , impose high costs on the health system and are among the major obstacles for pilgrims to perform hajj duties. the main aim of our study was to determine types, frequencies, etiologies, and epidemiologic factors of respiratory diseases among iran...

the link between allergic rhinitis and asthma is well known. bronchial hyperreactivity (bhr) may be present in rhinitis. the present study was aimed to compare airway responses in patients  with rhinitis symptoms alone following exercise challenge, and to  determine relationship of two different respiratory function tests. 98 subjects with rhinitis were investigated by spirometry and impulse os...

background: the most common laryngeal mass in children is recurrent respiratory papillomatosis (rrp). studies have attempted to correlate viral typing and its aggressiveness. method: 29 patients with histologically confirmed rrp enrolled in adjuvant therapies. patients underwent several surgical interventions. results: hpv genotyping demonstrated 45% hpv-6 and 55% hpv-11. the mean age at the fi...

The respiratory tract contains numerous peptides secreted from special pulmonary epithelial cells whichare called endocrine cells. The function of neuroendocrine cells is modulated by amines. Serotonin has strong vasomotor and bronchomotor effects in the airway mucosa. The objective of this study was to determine presence and distribution of serotonin-positive endocrine cells in respiratory tra...

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...