Publications by authors named "Shur-Wern W Chern"

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  • * These strains were isolated from stool samples of patients with acute flaccid paralysis (AFP).
  • * The samples were collected in Angola as part of poliovirus surveillance efforts in 2010.
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  • - The genomic sequences of two enterovirus C109 isolates were obtained from two separate cases involving respiratory disease in children.
  • - The isolates are named EV-C109 USA/FL/2016-21003 and EV-C109 USA/FL/2016-21002.
  • - This research represents the first documentation of EV-C109 genomes identified in the United States.
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  • In 2014, an outbreak of severe respiratory illness in the U.S. was linked primarily to enterovirus D68 (EV-D68), but also involved other enteroviruses and rhinoviruses.
  • A study analyzed respiratory specimens from patients during the outbreak to identify and characterize various enterovirus and rhinovirus types, revealing significant diversity among the viruses present.
  • The results indicated that while EV-D68 was the most common virus detected, many cases also involved rhinoviruses, highlighting the need for better understanding of these viruses to improve diagnostics and treatment strategies.
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Background: Enterovirus D68 (EV-D68) caused a widespread outbreak of respiratory illness in the United States in 2014, predominantly affecting children. We describe EV-D68 rates, spectrum of illness, and risk factors from prospective, population-based acute respiratory illness (ARI) surveillance at a large US pediatric hospital.

Methods: Children <13 years of age with ARI and residence in Hamilton County, Ohio were enrolled from the inpatient and emergency department (ED) settings at a children's hospital in Cincinnati, Ohio, from 1 July to 31 October 2014.

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Background: Sporadic cases of parotitis are generally assumed to be mumps, which often requires a resource-intensive public health response. This project surveyed the frequency of viruses detected among such cases.

Methods: During 2009-2011, 8 jurisdictions throughout the United States investigated sporadic cases of parotitis.

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Human enterovirus 68 (EV68) infections are rarely reported. We describe a respiratory outbreak associated with EV68 among 18 children admitted to a remote Indian Health Service facility during August 11, 2010 through September 14, 2010. Clinical illness was characterized by pneumonia and wheezing.

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We have developed a set of reverse transcription-PCR assays for the detection and identification of known and novel paramyxoviruses in clinical specimens. Primers were designed from the conserved motifs of the polymerase pol gene sequences to detect members of the Paramyxovirinae or Pneumovirinae subfamily or groups of genera within the Paramyxovirinae subfamily. The consensus-degenerate hybrid oligonucleotide primer design and seminested or nested PCR assay design were used to enhance the breadth of reactivity and sensitivity of the respective assays.

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The genomic sequences of severe acute respiratory syndrome coronaviruses from human and palm civet of the 2003/2004 outbreak in the city of Guangzhou, China, were nearly identical. Phylogenetic analysis suggested an independent viral invasion from animal to human in this new episode. Combining all existing data but excluding singletons, we identified 202 single-nucleotide variations.

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Severe acute respiratory syndrome-associated coronavirus (SARS-CoV) emerged, in November 2002, as a novel agent causing severe respiratory illness. To study sequence variation in the SARS-CoV genome, we determined the nucleic acid sequence of the S and N genes directly from clinical specimens from 10 patients--1 specimen with no matched SARS-CoV isolate, from 2 patients; multiple specimens from 3 patients; and matched clinical-specimen/cell-culture-isolate pairs from 6 patients. We identified 3 nucleotide substitutions that were most likely due to natural variation and 2 substitutions that arose after cell-culture passage of the virus.

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