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Bronchitis - Europe PMC

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Last Updated: 10 August 2022

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Treatment of Acute Bronchitis and its Impact on Return Emergency Department Visits.

No randomized studies have investigated whether prescribing antibiotics in the emergency department improves hospital return rates. Mission Our aim was to compare hospital return rates between those who were prescribed an antibiotic and those that were not. For the treatment of acute bronchitis, we determined this chart. Methods A retrospective cohort analysis was conducted on patients aged 18-64 years who presented to a community teaching hospital with acute bronchitis between January 2017 and December 2019. The key findings were 30-day ED return and hospital admissions from the first ED visit. Patients randomized an antibiotic for acute bronchitis therapy were compared to those who were not prescribed an antibiotic for the treatment of acute bronchitis vs. those patients who were not. Conclusions There was no association between antibiotic therapy for acute bronchitis treatment and returning to the hospital.

Source link: https://europepmc.org/article/MED/35933264


Infectious Bronchitis Virus: A Comprehensive Multilocus Genomic Analysis to Compare DMV/1639 and QX Strains

Infectious bronchitis virus is a highly infectious RNA virus that affects chickens around the world. The above-mentioned IBV evolution pathway and clinical result are two examples of the above-mentioned IBV evolutionary pathway and clinical outcome. Our aim was to systematically compare whole genomes of QX and DMV strains looking at each IBV gene individually. The QX dataset is more genetically diverse than the DMV survey, partially due to the increased diversity within the five QX strains used as a base compared to the four DMV strains used as a basis in comparison to the four DMV strains used in our analysis. Historically, QX strains have existed and spread earlier than DMV strains in Europe and Asia. In addition, there are more QX sequences embedded in GenBank than DMV strains, contributing to the identification of a larger pool of QX strains in a larger pool. When DMV strains develop and spread in North America, it is likely that a similar evolutionary pattern will be present.

Source link: https://europepmc.org/article/PPR/PPR527167


Antiviral activity and underlying mechanisms of Baicalin against avian infectious bronchitis virus in vitro .

However, the effect of baicalin on avian infectious bronchitis virus remains unclear. Baicalin has a direct virucidal action on IBV infection, but no prophylactic effect on IBV infection has been shown. During the various phases of the virus replication cycle, including viral replication, invasion, internalization, and release, the mRNA and protein of IBV N were reduced immediately when IBV-infected cells were treated with baicalin. When G3BP1 expression was reduced, the inhibitory activity of baicalin on IBV replication was inhibited, and G3BP1 expression was down-regulated, and eIF2u03b1 expression was stifled. These results revealed that baicalin activates phosphorylation of the PKR/eIF2 pathway and promotes SG formation by targeting G3BP1, initiating the antiviral reaction to reduce IBV replication on Vero cells. According to the results, baicalin is a promising candidate drug to treat or prevent IBV infection.

Source link: https://europepmc.org/article/MED/35917182


Molecular Characterization Analysis of Prevalent Infectious Bronchitis Virus and Pathogenicity Assessment of Recombination Strain in China.

In eight provinces of China, this research sought to investigate and measure IBV in broiler flocks with respiratory diseases. Using PCR assay, 910 samples from broiler flocks in total had IBV positive rates of 17. 6%. The CK/CH/JS/YC10-3 isolate most likely originated from recombination events between strain YX10 and strain TW2575-98, the pathogenicity of which was determined, comparing it to strain GZ14 and strain CK/CH/GD/JR07-7.

Source link: https://europepmc.org/article/MED/35942113


Novel and Alternative Therapeutic Strategies for Controlling Avian Viral Infectious Diseases: Focus on Infectious Bronchitis and Avian Influenza.

The growth of poultry raising has enabled the spread of infectious diseases and their pathogens among different species of birds, including avian infectious bronchitis virus and avian influenza viruses. Chicken mortality and economic losses can be traced back to IBV and AIV. The pharmaceutical industry is increasingly focusing on plant extracts to produce novel herbal drugs with proper antiviral properties. The mechanisms involved have outlined how these natural therapeutics agents aid in virus entry and replication in the host and prevent viral pathogenesis. This report, in general, examines the poultry industry's situation, current epidemic diseases, mainly IB and AI control, as well as the development of novel therapeutics using plant extracts and the use of nanotechnology technologies to help prevent these diseases.

Source link: https://europepmc.org/article/MED/35937298


Establishment and Cross-Protection Efficacy of a Recombinant Avian Gammacoronavirus Infectious Bronchitis Virus Harboring a Chimeric S1 Subunit.

Infectious bronchitis virus is a gammavirus that causes a highly infectious disease in chickens and seriously endangers the poultry industry. In the present research, an effective reverse genetics technique based on Beaudette-p65 has been used to produce a recombinant IBV by replacing the nucleotides 21,704-22,411 with the appropriate sequence from an isolate of QX-like genotype KC strain. Immunization of chicks with the recombinant IBV evoked robust antibody responses and demonstrated wide cross-protection against threats of virulent M41 and a QX-like genotype IBV.

Source link: https://europepmc.org/article/MED/35935229


Viral subpopulation variability in different batches of Infectious bronchitis virus (IBV) vaccines based on GI-23 lineage: Implications for the field.

The prevention of infectious bronchitis is largely based on routine vaccination administration, with many using live-attenuated vaccines. Three vaccine vials based on the IBV GI-23 lineage were deep sequenced by Next Generation Sequencing to investigate the presence and characteristics of viral subpopulations in the present study. The S1 series of strains originating from farms in various countries were sequenced and classified in order to clarify the effects in the field and identify potential indicators suitable for a DIVA program, based on the knowledge of their vaccination history and similarity with the applied vaccine. When compared to farm isolates, the vaccine consensus sequences and the respective subpopulations clustered with vaccine strains and no genetic information were consistently shared with field strains. Although some amino acid residues were most prevalent in field or vaccine strains, no single marker could be identified.

Source link: https://europepmc.org/article/MED/35872282


Bacterial artificial chromosome-based reverse genetics system for cloning and manipulation of the full-length genome of infectious bronchitis virus.

In this research, we developed a reverse genetics system for cloning the full cDNA of the IBV C-78E128 attenuated strain in a bacterial artificial chromosome to support molecular analysis of IBV pathogenesis and the manufacture of a new-generation IBV vaccine. The resultant S gene recombinant virus was found to be avirulent and fully competent to produce a serotype-specific VN antibody against the S95 strain, but the S gene recombinant virus did not fully recapitulate the tissue tropism of the S95E4 strain. The IBV BAC-based RGS, which allows cloning and manipulation of the IBV virus genome entirely in E. coli, provides a useful platform for scientific investigations of IBV pathogenesis and the production of inexpensively developed IBV recombinant vaccines.

Source link: https://europepmc.org/article/MED/35909616


Genome Sequence Variations of Infectious Bronchitis Virus Serotypes From Commercial Chickens in Mexico.

Despite routine vaccinations, new strains of infectious bronchitis viruses continue to appear. Here, we present genome sequences of IBVs isolated by random non-targeted next generation sequencing of vaccine and field samples obtained on FTA cards from commercial flocks in Mexico in 2019-2021. In 60. 0 percent of the tested samples, from which 33 complete genome sequences were de novo assembled, IBV RNA was detected in 60. 07% of the test results, with whom 33 complete genome sequences were de novo assembled. Seventeen sequences have a secondary S2' cleavage site, located 153 residues downstream from the canonically preserved primary furin-specific S1/S2 cleavage site. The effectiveness of FTA cards as an inexpensive, easily accessible low-cost sampling technique for untargeted discovery of avian viral agents in field-collected clinical samples has been shown by this research. Our findings show co-circulation of multiple distinct IBVs in Mexican commercial flocks, underscoring the need for active surveillance and a study of IBV vaccines commonly used in Mexico and the greater Latin America region.

Source link: https://europepmc.org/article/MED/35903135


Genetic and immunological characterization of commercial infectious bronchitis virus vaccines used in Korea.

We compared the S1 gene sequences of three IBV vaccines commercially available in Korea with those of various field isolates to clarify this problem. The vaccine strains were clustered into two distinct lineages, according to a phylogenetic review. The majority of the genetic variation was found in hypervariable regions, according to a comparison of commercial vaccines with their parental viruses. According to our report, vaccines should be selected carefully based on their genetic history because genetic variability can influence vaccine antigenicity and host immune responses.

Source link: https://europepmc.org/article/MED/35816229

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions