tetano
Editor, Senior Moderator
Int J Infect Dis. 2014 Nov 13;29C:254-258. doi: 10.1016/j.ijid.2014.10.029. [Epub ahead of print]
Viral genome and antiviral drug sensitivity analysis of two patients from a family cluster caused by the influenza A(H7N9) virus in Zhejiang, China, 2013.
Gao HN1, Yao HP1, Liang WF1, Wu XX1, Wu HB1, Wu NP1, Yang SG1, Zhang Q1, Su KK1, Guo J1, Zheng SF1, Zhu YX1, Chen HL2, Yuen KY2, Li LJ3.
Author information
Abstract
OBJECTIVES:
In the winter of 2013, people were facing the risk of human-to-human transmission of the re-emerging influenza A(H7N9) virus. We report herein information on the clinical features of two patients from the same family infected with this virus, the genomic sequences of the viruses harbored, and antiviral drug sensitivity.
METHODS:
Clinical and epidemiological data of two patients from the same family were collected and analyzed. Sequencing was done for the viruses isolated from these two patients and one epidemiologically related chicken, and the sequences of the eight gene segments of the viruses were analyzed phylogenetically. The sensitivity of the viruses to antiviral drug treatment was determined by neuraminidase inhibitor susceptibility test.
RESULTS:
The two patients from one family cluster shared the same symptoms but had different outcomes, and had a strong epidemiological link. Three strains, two from these two patients and one from the chicken, were isolated. Genome sequencing and analyses of phylogenetic trees demonstrated that the two viruses were almost identical. We noted the presence of the PB2 E627K amino acid substitution that was not present in isolates from the first wave, as well as two new mutations in the NA gene and six in the PB2 gene. Drug sensitivity testing showed that the new isolates were resistant to oseltamivir but sensitive to peramivir.
CONCLUSIONS:
The two patients from one family cluster were probable human-to-human transmission cases. The new isolates were sensitive to peramivir but showed reduced sensitivity to oseltamivir.
Copyright ? 2014. Published by Elsevier Ltd.
KEYWORDS:
Drug sensitivity; H7N9; Human-to-human transmission; Influenza; Oseltamivir; Peramivir
PMID:
25462187
[PubMed - as supplied by publisher]
Free full text
http://www.ncbi.nlm.nih.gov/pubmed/25462187
Viral genome and antiviral drug sensitivity analysis of two patients from a family cluster caused by the influenza A(H7N9) virus in Zhejiang, China, 2013.
Gao HN1, Yao HP1, Liang WF1, Wu XX1, Wu HB1, Wu NP1, Yang SG1, Zhang Q1, Su KK1, Guo J1, Zheng SF1, Zhu YX1, Chen HL2, Yuen KY2, Li LJ3.
Author information
Abstract
OBJECTIVES:
In the winter of 2013, people were facing the risk of human-to-human transmission of the re-emerging influenza A(H7N9) virus. We report herein information on the clinical features of two patients from the same family infected with this virus, the genomic sequences of the viruses harbored, and antiviral drug sensitivity.
METHODS:
Clinical and epidemiological data of two patients from the same family were collected and analyzed. Sequencing was done for the viruses isolated from these two patients and one epidemiologically related chicken, and the sequences of the eight gene segments of the viruses were analyzed phylogenetically. The sensitivity of the viruses to antiviral drug treatment was determined by neuraminidase inhibitor susceptibility test.
RESULTS:
The two patients from one family cluster shared the same symptoms but had different outcomes, and had a strong epidemiological link. Three strains, two from these two patients and one from the chicken, were isolated. Genome sequencing and analyses of phylogenetic trees demonstrated that the two viruses were almost identical. We noted the presence of the PB2 E627K amino acid substitution that was not present in isolates from the first wave, as well as two new mutations in the NA gene and six in the PB2 gene. Drug sensitivity testing showed that the new isolates were resistant to oseltamivir but sensitive to peramivir.
CONCLUSIONS:
The two patients from one family cluster were probable human-to-human transmission cases. The new isolates were sensitive to peramivir but showed reduced sensitivity to oseltamivir.
Copyright ? 2014. Published by Elsevier Ltd.
KEYWORDS:
Drug sensitivity; H7N9; Human-to-human transmission; Influenza; Oseltamivir; Peramivir
PMID:
25462187
[PubMed - as supplied by publisher]
Free full text
http://www.ncbi.nlm.nih.gov/pubmed/25462187