scholarly journals Prevalence and Molecular Characterization of Human Bocavirus Detected in Croatian Children with Respiratory Infection

Viruses ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1728
Author(s):  
Sunčanica Ljubin-Sternak ◽  
Anamarija Slović ◽  
Maja Mijač ◽  
Mirna Jurković ◽  
Dubravko Forčić ◽  
...  
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Rapid Evolution ◽  
Respiratory Pathogen ◽  
Human Bocavirus ◽  
Rates Of Evolution ◽  
Phylogenetic Grouping

Human bocavirus (HBoV) 1 is considered an important respiratory pathogen, while the role of HBoV2-4 in clinical disease remains somewhat controversial. Since, they are characterized by a rapid evolution, worldwide surveillance of HBoVs’ genetics is necessary. This study explored the prevalence of HBoV genotypes in pediatric patients with respiratory tract infection in Croatia and studied their phylogeny. Using multiplex PCR for 15 respiratory viruses, we investigated 957 respiratory samples of children up to 18 years of age with respiratory tract infection obtained from May 2017 to March 2021 at two different hospitals in Croatia. Amplification of HBoV near-complete genome or three overlapping fragments was performed, sequenced, and their phylogenetic inferences constructed. HBoV was detected in 7.6% children with a median age of 1.36 years. Co-infection was observed in 82.2% samples. Sequencing was successfully performed on 29 HBoV positive samples, and all belonged to HBoV1. Croatian HBoV1 sequences are closely related to strains isolated worldwide, and no phylogenetic grouping based on mono- or co-infection cases or year of isolation was observed. Calculated rates of evolution for HBoV1 were 10−4 and 10−5 substitutions per site and year. Recombination was not detected among sequences from this study.

scholarly journals Atypical presentation of human bocavirus: Severe respiratory tract infection complicated with encephalopathy

2015 ◽  
Vol 87 (11) ◽  
pp. 1831-1838 ◽  
Author(s):  
Hacer Akturk ◽  
Guntulu Sık ◽  
Nuran Salman ◽  
Murat Sutcu ◽  
Burak Tatli ◽  
...  
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Human Bocavirus ◽  
Atypical Presentation

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.

scholarly journals Identification of Human Bocavirus type 4 in a child asymptomatic for respiratory tract infection and acute gastroenteritis – Goiânia, Goiás, Brazil

2017 ◽  
Vol 21 (4) ◽  
pp. 472-476 ◽  
Author(s):  
Teresinha Teixeira de Sousa ◽  
Tâmera Nunes Vieira Almeida ◽  
Fabíola Souza Fiaccadori ◽  
Menira Souza ◽  
Kareem Rady Badr ◽  
...  
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Acute Gastroenteritis ◽  
Human Bocavirus

scholarly journals Human Bocavirus in Patients with Respiratory Tract Infection

2011 ◽  
Vol 31 (3) ◽  
pp. 179-184 ◽  
Author(s):  
Jang Su Kim ◽  
Chae Seung Lim ◽  
Young Kee Kim ◽  
Kap No Lee ◽  
Chang Kyu Lee
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Human Bocavirus

scholarly journals Increased Detection of Viruses in Children with Respiratory Tract Infection Using PCR

2020 ◽  
Vol 17 (2) ◽  
pp. 564 ◽  
Author(s):  
Chien-Yu Lin ◽  
David Hwang ◽  
Nan-Chang Chiu ◽  
Li-Chuan Weng ◽  
Hsin-Fu Liu ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Respiratory Viruses ◽  
Accurate Diagnosis ◽  
Human Bocavirus ◽  
Detection Rates ◽  
Syncytial Virus ◽  
Antigen Tests

Respiratory viruses are a common cause of respiratory tract infection (RTI), particularly in neonates and children. Rapid and accurate diagnosis of viral infections could improve clinical outcomes and reduce the use of antibiotics and treatment sessions. Advances in diagnostic technology contribute to the accurate detection of viruses. We performed a multiplex real-time polymerase chain reaction (PCR) to investigate the viral etiology in pediatric patients and compared the detection rates with those determined using traditional antigen tests and virus cultures. Fifteen respiratory viruses were included in our investigation: respiratory syncytial virus A/B (RSV), influenza virus A (FluA) and influenza virus B (FluB), human metapneumovirus (MPV), enterovirus (EV), human parainfluenza virus (PIV) types 1–4, human rhinovirus (RV), human coronavirus OC43, NL63, and 229E, human adenovirus (ADV), and human bocavirus (Boca). In total, 474 specimens were collected and tested. Respiratory viruses were detected more frequently by PCR (357, 75.3%) than they were by traditional tests (229, 49.3%). The leading pathogens were RSV (113, 23.8%), RV (72, 15.2%), PIV3 (53, 11.2%), FluA (51, 10.8%), and ADV (48, 10.1%). For children younger than 5 years, RSV and RV were most prevalent; for children older than 5 years, FluA and ADV were the most frequently detected. Of the specimens, 25.8% (92/357) were coinfected with two or more viruses. RV, Boca, PIV2, FluB, and PIV4 had higher rates of coinfection; MPV and PIV1 had the lowest rates of coinfection (9.1% and 5.3%). To conclude, the detection power of PCR was better than that of traditional antigen tests and virus cultures when considering the detection of respiratory viruses. RSV and RV were the leading viral pathogens identified in the respiratory specimens. One-quarter of the positive specimens were coinfected with two or more viruses. In the future, further application of PCR may contribute to the rapid and accurate diagnosis of respiratory viruses and could improve patient outcomes.

scholarly journals 1756. Role of Human bocavirus Respiratory Tract Infection in Hematopoietic Cell Transplant Recipients

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S645-S645
Author(s):  
Chikara Ogimi ◽  
Emily T Martin ◽  
Hu Xie ◽  
Angela P Campbell ◽  
Alpana Waghmare ◽  
...  
Keyword(s):  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Retrospective Review ◽  
Respiratory Symptoms ◽  
Hematopoietic Cell ◽  
Human Bocavirus ◽  
Cell Transplant ◽  
Hematopoietic Cell Transplant ◽  
Allogeneic Hct

Abstract Background Limited data exist regarding the impact of human bocavirus (BoV) in hematopoietic cell transplant (HCT) recipients. We examined incidence and disease spectrum of BoV respiratory tract infection (RTI) in HCT recipients. Methods In a longitudinal surveillance study of viral RTIs among allogeneic HCT recipients, pre-HCT and weekly post-HCT nasal washes and symptom surveys were collected through day 100, then every 3 months, and whenever respiratory symptoms occurred through 1-year post-HCT. Samples were tested by multiplex semi-quantitative PCR for RSV, parainfluenza virus 1–4, influenza A/B, adenovirus, human metapneumovirus, rhinovirus, coronavirus, and BoV. Plasma samples from BoV+ subjects were analyzed by PCR. In addition, we conducted a retrospective review of HCT recipients with BoV detected in bronchoalveolar lavage or lung biopsy. Results Among 469 patients in the prospective cohort, 21 distinct BoV RTIs (3 pre-HCT and 18 post-HCT) were observed by 1-year post-HCT in 19 patients (median 42 years old, range 0–67) without apparent seasonality. BoV was more frequently detected in the latter half of the first 100 days post-HCT (Figure 1). The frequencies of respiratory symptoms in patients with BoV detected did not appear to be higher than those without any virus detected, with the exception of watery eyes (P < 0.01) (Figure 2). Univariable models among patients with BoV RTI post-HCT showed higher peak viral load in nasal samples (P = 0.04) and presence of respiratory copathogens (P = 0.03) were associated with presence of respiratory symptoms; however, BoV detection in plasma was not (P = 0.8). Retrospective review identified 6 allogeneic HCT recipients (range 1–64 years old) with BoV detected in lower respiratory tract specimens [incidence rate of 0.4% (9/2,385) per sample tested]. Although all 6 cases presented with hypoxemia, 4 had significant respiratory copathogens or concomitant conditions that contributed to respiratory compromise. No death was attributed mainly to BoV lower RTI. Conclusion BoV is infrequently detected in respiratory tract in HCT recipients. Our studies did not demonstrate convincing evidence that BoV is a significant pathogen in either upper or lower respiratory tracts. Watery eyes were associated with BoV detection. Disclosures All authors: No reported disclosures.

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