Background – Little is known about the time trend in mortality rates due to respiratory viruses other than SARS-CoV-2 and seasonal influenza among Brazilian children adolescents. Methods Study outcomes were A, B, syncytial virus, metapneumovirus, rhinovirus, parainfluenza, adenovirus, bocavirus, for age groups <5, 5-9, 10-19 years of age, Brazil, over 2009-2022 period. Secondary data from Mi...

BACKGROUND Severe acute respiratory infection (SARI) threatens human health and even survival, causing a huge number of hospitalized patients every year. However, as one of the most common respiratory viruses circulated worldwide, the epidemiological and phylogenetic characteristics of human parainfluenza virus (HPIV) in these cases were not well known. OBJECTIVES To reveal the epidemiologica...

Brown alga, Turbinaria conoides was successively extracted with n-hexane, cyclohexane, methanol and ethanol:water (1:1). The extracts were evaluated for antibacterial and antifungal activities by disc diffusion method. Minimal inhibitory concentration was determined for active extracts by broth dilution method. The antiviral activity and cytotoxicity of the extracts were tested in human embryon...

background upper respiratory tract infections (urti) in children are the most frequent reasons for visiting a family doctor, commonly resulting in inappropriate prescription of antibiotics. in underdeveloped countries, a viral respiratory tract infection may be followed by serious complications. more than 200 viral species are associated with respiratory tract diseases in humans and this number...

H parainfluenza viruses (HPIVs) have been recognized as a cause of respiratory tract infections for many decades. They belong to the Paramyxoviridae family, subfamily Paramyxovirinae, and are classified into 4 serotypes. Serotype 4 can be further subdivided into 2 antigenic subtypes, HPIV-4A and HPIV-4B (1). Although the epidemiology and clinical manifestations of serotypes HPIV-1 to HPIV-3 are...

Rapid immunofluorescence (FA) methods for the detection of common respiratory viruses were compared with culture results over a 3-year period to assess the relative efficiency of FA in a clinical laboratory setting. For respiratory syncytial virus, efficiencies were high (sensitivity, 90 to 95%; specificity, 92 to 95%). The sensitivity of FA for detection of parainfluenza virus type 1, parainfl...

Surveillance of respiratory viruses has been conducted for many years at the public health laboratory in Hong Kong. With the occurrence of pandemic influenza A (H1N1) 2009, we observed a change in the seasonality of influenza activity with a seemingly corresponding change in the activity of respiratory syncytial virus, parainfluenza virus, and adenovirus during 2009-2011. This phenomenon could ...

Respiratory viruses are among the most important causes of human morbidity and mortality worldwide, especially for infants and young children. In the past years, a few commercial multiplex RT-PCR assays have been used to detect respiratory viruses in spite of the high cost. In the present study, an improved single-tube multiplex reverse transcription PCR assay for simultaneous detection of 13 r...