scholarly journals The role of molecular diagnosis in acute respiratory tract infection

2019 ◽  
Vol 57 (6) ◽  
pp. 511
Author(s):  
Katsunori Yanagihara
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Molecular Diagnosis ◽  
Acute Respiratory Tract Infection

scholarly journals Toll-Like Receptors: Expression and Roles in Otitis Media

2021 ◽  
Vol 22 (15) ◽  
pp. 7868
Author(s):  
Su Young Jung ◽  
Dokyoung Kim ◽  
Dong Choon Park ◽  
Sung Soo Kim ◽  
Tong In Oh ◽  
...  
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Otitis Media ◽  
Middle Ear ◽  
Upper Respiratory Tract Infection ◽  
Upper Respiratory Tract ◽  
Toll Like Receptors ◽  
Upper Respiratory

Otitis media is mainly caused by upper respiratory tract infection and eustachian tube dysfunction. If external upper respiratory tract infection is not detected early in the middle ear, or an appropriate immune response does not occur, otitis media can become a chronic state or complications may occur. Therefore, given the important role of Toll-like receptors (TLRs) in the early response to external antigens, we surveyed the role of TLRs in otitis media. To summarize the role of TLR in otitis media, we reviewed articles on the expression of TLRs in acute otitis media (AOM), otitis media with effusion (OME), chronic otitis media (COM) with cholesteatoma, and COM without cholesteatoma. Many studies showed that TLRs 1–10 are expressed in AOM, OME, COM with cholesteatoma, and COM without cholesteatoma. TLR expression in the normal middle ear mucosa is absent or weak, but is increased in inflammatory fluid of AOM, effusion of OME, and granulation tissue and cholesteatoma of COM. In addition, TLRs show increased or decreased expression depending on the presence or absence of bacteria, recurrence of disease, tissue type, and repeated surgery. In conclusion, expression of TLRs is associated with otitis media. Inappropriate TLR expression, or delayed or absent induction, are associated with the occurrence, recurrence, chronicization, and complications of otitis media. Therefore, TLRs are very important in otitis media and closely related to its etiology.

Effect of vitamin A supplementation on diarrhoea and acute respiratory tract infection in children

1994 ◽  
Vol 10 (1) ◽  
pp. 57-61 ◽  
Author(s):  
R. Biswas ◽  
A. B. Biswas ◽  
B. Manna ◽  
S. K. Bhattacharya ◽  
R. Dey ◽  
...  
Keyword(s):  
Tract Infection ◽  
Vitamin A ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Acute Respiratory Tract Infection ◽  
Vitamin A Supplementation

scholarly journals Respiratory syncytial virus genotypes NA1, ON1, and BA9 are prevalent in Thailand, 2012–2015

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3970 ◽  
Author(s):  
Ilada Thongpan ◽  
John Mauleekoonphairoj ◽  
Preeyaporn Vichiwattana ◽  
Sumeth Korkong ◽  
Rujipat Wasitthankasem ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Acute Respiratory Tract Infection ◽  
Glycosylation Site ◽  
Predicted Amino Acid Sequence ◽  
Glycoprotein Gene ◽  
Virus Genotypes ◽  
Syncytial Virus

Respiratory syncytial virus (RSV) causes acute lower respiratory tract infection in infants and young children worldwide. To investigate the RSV burden in Thailand over four consecutive years (January 2012 to December 2015), we screened 3,306 samples obtained from children ≤5 years old with acute respiratory tract infection using semi-nested reverse-transcription polymerase chain reaction (RT-PCR). In all, 8.4% (277/3,306) of the specimens tested positive for RSV, most of which appeared in the rainy months of July to November. We then genotyped RSV by sequencing the G glycoprotein gene and performed phylogenetic analysis to determine the RSV antigenic subgroup. The majority (57.4%, 159/277) of the RSV belonged to subgroup A (RSV-A), of which NA1 genotype was the most common in 2012 while ON1 genotype became prevalent the following year. Among samples tested positive for RSV-B subgroup B (RSV-B) (42.6%, 118/277), most were genotype BA9 (92.6%, 87/94) with some BA10 and BA-C. Predicted amino acid sequence from the partial G region showed highly conserved N-linked glycosylation site at residue N237 among all RSV-A ON1 strains (68/68), and at residues N296 (86/87) and N310 (87/87) among RSV-B BA9 strains. Positive selection of key residues combined with notable sequence variations on the G gene contributed to the continued circulation of this rapidly evolving virus.

scholarly journals A study on association between respiratory tract infection and serum 25 (OH) vitamin D level in children

2020 ◽  
Vol 7 (11) ◽  
pp. 2198
Author(s):  
Rajesh Kumar Sah ◽  
Hemant Kumar
Keyword(s):  
Vitamin D ◽  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Serum Vitamin ◽  
Acute Respiratory Tract Infection ◽  
Control Group ◽  
Medical College ◽  
Serum Vitamin D ◽  
25 Oh Vitamin D

Background: Acute respiratory tract infection are a major cause of global morbidity and mortality. Observational studies report consistent independent association between low serum concentration of 25-hydroxy-vitamin D and susceptibility to acute respiratory tract infection. This study was done to assess serum vitamin D level in children and correlation with respiratory tract infection.Methods: The present study was undertaken in department of paediatrics medicine, Patna Medical College and Hospital in patients attending out-patients department (OPD) as well as admitted in in-patients department (IPD). Assessment of serum 25(OH) Vitamin D was done by the enzyme immunoassay kit at Patna Medical College and Hospital.Results: The mean serum vitamin D level in cases was (20.52±5.64 ng/ml) where as in control group was (26.46±4.52 ng/ml) with a statically significant p value of <0.0001, hence cases are associated with vitamin D deficiency.Conclusions: The finding in this study showed significantly decreased mean serum vitamin D level in cases than that of control which implies that vitamin D deficiency predisposes to respiratory tract infection in children.

Human respiratory syncytial virus load normalized by cell quantification as predictor of acute respiratory tract infection

2018 ◽  
Vol 90 (5) ◽  
pp. 861-866 ◽  
Author(s):  
Miriam Gómez‐Novo ◽  
José A. Boga ◽  
Marta E. Álvarez‐Argüelles ◽  
Susana Rojo‐Alba ◽  
Ana Fernández ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Acute Respiratory Tract Infection ◽  
Human Respiratory Syncytial Virus ◽  
Virus Load ◽  
Cell Quantification ◽  
Syncytial Virus

Detection of enterovirus 68 as one of the commonest types of enterovirus found in patients with acute respiratory tract infection in China

2014 ◽  
Vol 63 (3) ◽  
pp. 408-414 ◽  
Author(s):  
Qing-Bin Lu ◽  
Ying Wo ◽  
Hong-Yu Wang ◽  
Mao-Ti Wei ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Wide Spectrum ◽  
Mainland China ◽  
Severe Pneumonia ◽  
Respiratory Illness ◽  
Acute Respiratory Tract Infection ◽  
Human Enterovirus ◽  
Coxsackievirus A6

Human enterovirus 68 (HEV-68) is an enterovirus associated with respiratory illness. In China, no information about HEV-68 is available for children yet. This study aimed to investigate the presence of HEV-68 in mainland China between 2009 and 2012 and to explore the migration events of HEV-68 across the world. Among 1565 samples tested from children, 41 (2.6 %) were positive for HEV and 223 (14.3 %) for human rhinovirus (HRV). Seven (17.1 %) of 41 HEVs were HEV-68. Two HEV-68- and five HRV-positive samples were detected in 585 adult samples. HEV-68 is the predominant type of enterovirus in children with acute respiratory tract infection (ARTI), followed by HEV-71 and coxsackievirus A6. Three HEV-68-infected children presented with severe pneumonia and one presented with a severe asthma attack. The viruses were attributed to two novel distinct sublineages of HEV-68 based on phylogenetic analysis of partial VP1 gene sequences. Migration events analysis showed that the USA and the Netherlands were possible geographical sources of HEV-68, from where three strains migrated to China. In conclusion, HEV-68 may play a predominant role among the enteroviruses associated with ARTI in children. Additional surveillance is needed to clarify the reason why HEV-68 causes such a wide spectrum of disease, from asymptomatic to severe respiratory disease and even death.

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