J Infect Dis. 2016 Dec 15;214(12):1929-1936. Epub 2016 Oct 7.
Seroevidence for a High Prevalence of Subclinical Infection With Avian Influenza A(H5N1) Virus Among Workers in a Live-Poultry Market in Indonesia.
Shimizu K1,2, Wulandari L1,3, Poetranto ED1,4, Setyoningrum RA1,5, Yudhawati R1,3, Sholikhah A1,5, Nastri AM1, Poetranto AL1, Candra AY1, Puruhito EF1, Takahara Y1,2, Yamagishi Y1,2, Yamaoka M1,2, Hotta H2, Ustumi T1,2, Lusida MI1, Soetjipto1, Shimizu YK1,2, Soegiarto G1,6, Mori Y2.
Author information
Abstract
BACKGROUND:
In Indonesia, highly pathogenic avian influenza A(H5N1) virus has become endemic in poultry and has caused sporadic deadly infections in human. Since 2012, we have conducted fixed-point surveillance of avian influenza viruses at a live-poultry market in East Java, Indonesia. In this study, we examined the seroprevalence of avian influenza A(H5N1) virus infection among market workers.
METHODS:
Sera were collected from 101 workers in early 2014 and examined for antibody activity against avian A(H5N1) Eurasian lineage virus by a hemagglutination-inhibition (HI) assay.
RESULTS:
By the HI assay, 84% of the sera tested positive for antibody activity against the avian virus. Further analysis revealed that the average HI titer in 2014 was 2.9-fold higher than in 2012 and that seroconversion occurred in 44% of paired sera (11 of 25) between 2012 and 2014. A medical history survey was performed in 2016; responses to questionnaires indicated that none of workers had had severe acute respiratory illness during 2013.
CONCLUSIONS:
This study provides evidence of a high prevalence of avian A(H5N1) virus infection in 2013 among workers at a live-poultry market. However, because no instances of hospitalizations were reported, we can conclude the virus did not manifest any clinical symptoms in workers.
? The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America.
KEYWORDS:
H5N1; HI; avian; hemagglutination inhibition; influenza virus; poultry; seroconversion; seroepidemiology; subclinical infection
PMID: 27923953 PMCID: PMC5142092 DOI: 10.1093/infdis/jiw478
[PubMed - in process]
Seroevidence for a High Prevalence of Subclinical Infection With Avian Influenza A(H5N1) Virus Among Workers in a Live-Poultry Market in Indonesia.
Shimizu K1,2, Wulandari L1,3, Poetranto ED1,4, Setyoningrum RA1,5, Yudhawati R1,3, Sholikhah A1,5, Nastri AM1, Poetranto AL1, Candra AY1, Puruhito EF1, Takahara Y1,2, Yamagishi Y1,2, Yamaoka M1,2, Hotta H2, Ustumi T1,2, Lusida MI1, Soetjipto1, Shimizu YK1,2, Soegiarto G1,6, Mori Y2.
Author information
Abstract
BACKGROUND:
In Indonesia, highly pathogenic avian influenza A(H5N1) virus has become endemic in poultry and has caused sporadic deadly infections in human. Since 2012, we have conducted fixed-point surveillance of avian influenza viruses at a live-poultry market in East Java, Indonesia. In this study, we examined the seroprevalence of avian influenza A(H5N1) virus infection among market workers.
METHODS:
Sera were collected from 101 workers in early 2014 and examined for antibody activity against avian A(H5N1) Eurasian lineage virus by a hemagglutination-inhibition (HI) assay.
RESULTS:
By the HI assay, 84% of the sera tested positive for antibody activity against the avian virus. Further analysis revealed that the average HI titer in 2014 was 2.9-fold higher than in 2012 and that seroconversion occurred in 44% of paired sera (11 of 25) between 2012 and 2014. A medical history survey was performed in 2016; responses to questionnaires indicated that none of workers had had severe acute respiratory illness during 2013.
CONCLUSIONS:
This study provides evidence of a high prevalence of avian A(H5N1) virus infection in 2013 among workers at a live-poultry market. However, because no instances of hospitalizations were reported, we can conclude the virus did not manifest any clinical symptoms in workers.
? The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America.
KEYWORDS:
H5N1; HI; avian; hemagglutination inhibition; influenza virus; poultry; seroconversion; seroepidemiology; subclinical infection
PMID: 27923953 PMCID: PMC5142092 DOI: 10.1093/infdis/jiw478
[PubMed - in process]
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