ABSTRACT
Background: At the peak of the viral season, World Health Organization ranked respiratory syncytial virus (RSV) as a major cause of acute respiratory infections in more than 60% of children and more than 80% of infants younger than one year. The current study is the first in the governorate of Was it to investigate respiratory syncytial virus subtypes. The objectives of the study were to estimate the frequency of respiratory syncytial virus in children <5 years old and to recognize some potential risk factors that might be associated with respiratory tract infections.Methodology: A cross sectional study with conventional reverse transcription polymerase chain reaction was performed on nasopharyngeal swabs from 158 pediatric patients. We compared the demographic and clinical characteristics of the patients aged 15 days to 60 months hospitalised with RTIs or seen at private clinics (cases, n = 158) and control children (n = 40) with non-respiratory symptoms during the respiratory season of 2021-2022. Pearson's chi-square (x2) model was applied, and P < 0.05 was considered significant.Results: RSV nucleic acid was detected in 15 (9.49%) of the 158 clinical specimens after amplification of the F gene. The identity of these amplified fragments was confirmed as human respiratory syncytial virus subtype B by sequencing. Except the clinical presentation there was no overall association between negative and positive cases while breast feeding and family history of the same condition when comparing the control and positive cases showed statistically significant.Conclusions: conventional PCR was successfully detected the subtype B of h RSV while it may not the appropriate PCR type for subtype A detecting or that the RSVB was the only subtype circulated in 2021-2022 winter.