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Russia Influenza Surveillance 2013-2014

Re: Russia Influenza Surveillance 2013-2014

Week 10: 03.03.2014-09.03.2014

Influenza and ARI morbidity data

Epidemiological data show decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (75.2 per 10 000 of population) has exceeded the national baseline (69.3) by 8.5%.
ILI and ARI epidemic thresholds were exceeded in two cities of Volga and Siberian Federal Districts (FD) from 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 48 RBLs and two WHO NICs. According to these data as a result of 2527 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 17.8%, including 5.1% for influenza А(H1N1)pdm09, 10.4% for influenza A(H3N2), 0.7% for influenza type A and 1.6% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Decreased influenza and other ARI activity was registered during the week 10.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (75.2 per 10 000 of population) has exceeded the national baseline (69.3) by 8.5%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 17.8%. Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 22.2% of investigated patients by IFA and 19.1% by PCR.
In sentinel surveillance system clinical samples from 108 SARI and ILI/ARI patients were investigated by rRT-PCR. 12 influenza А(Н1N1)pdm09, 29 А(H3N2), one influenza A and one influenza B cases were detected.
Antigenic characterization: Totally 119 influenza viruses were characterizated antigenically since start of 2013-2014 season including 29 A(H1N1)pdm09 strains, 88 A(H3N2) strains and two influenza type B strains. Antigenically 26 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. All 88 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain. One influenza B strain was characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage, one influenza B strain was characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage.
Genetic characterization: Influenza A(H1N1)pdm09 virus was shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 3 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C).
http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
Re: Russia Influenza Surveillance 2013-2014

Week 11: 10.03.2014-16.03.2014

Influenza and ARI morbidity data

Epidemiological data show decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (72.0 per 10 000 of population) has exceeded the national baseline (69.3) by 3.9%.
ILI and ARI epidemic thresholds were exceeded in 7 cities of North-Western, Siberian, Ural and Volga Federal Districts (FD) from 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 48 RBLs and two WHO NICs. According to these data as a result of 2691 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 18.2%, including 3.9% for influenza А(H1N1)pdm09, 12.0% for influenza A(H3N2), 0.2% for influenza type A and 2.1% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Decreased influenza and other ARI activity was registered during the week 11.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (72.0 per 10 000 of population) has exceeded the national baseline (69.3) by 3.9%.

Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 18.2%. Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 21.1% of investigated patients by IFA and 17.1% by PCR.

In sentinel surveillance system clinical samples from 121 SARI and ILI/ARI patients were investigated by rRT-PCR. 18 influenza А(Н1N1)pdm09, 15 А(H3N2) and 4 influenza B cases were detected.

Antigenic characterization: Totally 186 influenza viruses were characterizated antigenically since start of 2013-2014 season including 45 A(H1N1)pdm09 strains, 136 A(H3N2) strains and 5 influenza type B strains. Antigenically 42 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. 135 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain and one strain was drift variant of A/Texas/50/12. One influenza B strain was characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage, 4 influenza B strains were characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage.

Genetic characterization: Influenza A(H1N1)pdm09 virus was shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 3 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C).

Susceptibility to antiviral drugs. According to Munana-test investigations showed that 7 influenza A(H1N1)pdm09 viruses, 19 A(H3N2) viruses and 2 influenza type B were susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
Re: Russia Influenza Surveillance 2013-2014

Week 12: 17.03.2014-23.03.2014

Influenza and ARI morbidity data

Epidemiological data show increase of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (76.2 per 10 000 of population) has exceeded the national baseline (69.3) by 10.1%.
ILI and ARI epidemic thresholds were exceeded in 3 cities of Central, Siberian and Volga Federal Districts (FD) from 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 51 RBLs and two WHO NICs. According to these data as a result of 2817 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 19.0%, including 4.8% for influenza А(H1N1)pdm09, 11.5% for influenza A(H3N2), 0.6% for influenza type A and 2.1% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Increase of influenza and other ARI activity in Russia was registered during the week 12.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (76.2 per 10 000 of population) has exceeded the national baseline (69.3) by 10.1%.

Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 19.0%, including 4.8% for influenza А(H1N1)pdm09, 11.5% for influenza A(H3N2), 0.6% for influenza type A and 2.1% for influenza type B virus.
Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 22.9% of investigated patients by IFA and 20.3% by PCR.
In sentinel surveillance system clinical samples from 128 SARI and ILI/ARI patients were investigated by rRT-PCR. 12 influenza А(Н1N1)pdm09, 24 А(H3N2) and 5 influenza B cases were detected.

Antigenic characterization:
Totally 208 influenza viruses were characterizated antigenically since start of 2013-2014 season including 50 A(H1N1)pdm09 strains, 150 A(H3N2) strains and 8 influenza type B strains. Antigenically 47 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. 149 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain and one strain was drift variant of A/Texas/50/12. One influenza B strain was characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage, 6 influenza B strains were characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage and one strain was drift variant of B/Massachusetts/02/2012.

Genetic characterization: 3 influenza A(H1N1)pdm09 viruses were shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 3 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C).

Susceptibility to antiviral drugs. According to Munana-test investigations showed that 7 influenza A(H1N1)pdm09 viruses, 19 A(H3N2) viruses and 2 influenza type B were susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
Re: Russia Influenza Surveillance 2013-2014

Week 13: 24.03.2014-30.03.2014

Influenza and ARI morbidity data

Epidemiological data show decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (70.0 per 10 000 of population) has exceeded the national baseline (69.3) by 1.01%.
ILI and ARI epidemic thresholds were exceeded in 3 cities of Central, North-Western and Siberian Federal Districts (FD) from 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 50 RBLs and two WHO NICs. According to these data as a result of 2703 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 17.0%, including 4.0% for influenza А(H1N1)pdm09, 10.0% for influenza A(H3N2), 0.6% for influenza type A and 2.7% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Decrease of influenza and other ARI activity in Russia was registered during the week 13.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (70.0 per 10 000 of population) has exceeded the national baseline (69.3) by 1.01%.

Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 17.0%, including 4.0% for influenza А(H1N1)pdm09, 10.0% for influenza A(H3N2), 0.6% for influenza type A and 2.7% for influenza type B virus.
Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 22.4% of investigated patients by IFA and 22.7% by PCR.
In sentinel surveillance system clinical samples from 122 SARI and ILI/ARI patients were investigated by rRT-PCR. 12 influenza А(Н1N1)pdm09, 15 А(H3N2) and 6 influenza B cases were detected.

Antigenic characterization:
Totally 234 influenza viruses were characterizated antigenically since start of 2013-2014 season including 57 A(H1N1)pdm09 strains, 168 A(H3N2) strains and 9 influenza type B strains. Antigenically 54 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. 166 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain and two strains were drift variants of A/Texas/50/12. One influenza B strain was characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage, 6 influenza B strains were characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage and two strains were drift variants of B/Massachusetts/02/2012.

Genetic characterization: 3 influenza A(H1N1)pdm09 viruses were shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 3 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C).
Susceptibility to antiviral drugs. According to Munana-test investigations showed that 7 influenza A(H1N1)pdm09 viruses, 19 A(H3N2) viruses and 2 influenza type B were susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
Re: Russia Influenza Surveillance 2013-2014

Week 14: 31.03.2014-06.04.2014

Influenza and ARI morbidity data

Epidemiological data show decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (62.2 per 10 000 of population) was lower than the national baseline (69.3) by 10.2%.
ILI and ARI epidemic thresholds were exceeded in 3 cities of Central, North-Western and Siberian Federal Districts (FD) from 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 48 RBLs and two WHO NICs. According to these data as a result of 2080 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 16.3%, including 3.5% for influenza А(H1N1)pdm09, 8.6% for influenza A(H3N2), 0.8% for influenza type A and 3.5% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Decrease of influenza and other ARI activity in Russia was registered during the week 14.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (62.2 per 10 000 of population) has exceeded the national baseline (69.3) by 10.2%.

Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 16.3%, including 3.5% for influenza А(H1N1)pdm09, 8.6% for influenza A(H3N2), 0.8% for influenza type A and 3.5% for influenza type B virus.
Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 18.3% of investigated patients by IFA and 24.3% by PCR.

In sentinel surveillance system clinical samples from 99 SARI and ILI/ARI patients were investigated by rRT-PCR. 11 influenza А(Н1N1)pdm09, 7 А(H3N2) and 9 influenza B cases were detected.

Antigenic characterization: Totally 297 influenza viruses were characterizated antigenically since start of 2013-2014 season including 61 A(H1N1)pdm09 strains, 224 A(H3N2) strains and 12 influenza type B strains. Antigenically 59 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. 222 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain and two strains were drift variants of A/Texas/50/12. One influenza B strain was characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage, 8 influenza B strains were characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage and three strains were drift variants of B/Massachusetts/02/2012.

Genetic characterization: 3 influenza A(H1N1)pdm09 viruses were shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 3 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C).

Susceptibility to antiviral drugs. According to Munana-test investigations showed that 7 influenza A(H1N1)pdm09 viruses, 19 A(H3N2) viruses and 2 influenza type B were susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
Re: Russia Influenza Surveillance 2013-2014

Week 15: 07.04.2014-13.04.2014

Influenza and ARI morbidity data

Epidemiological data show decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (59.1 per 10 000 of population) was lower than the national baseline (69.3) by 14.7%.
ILI and ARI epidemic thresholds were exceeded in 4 cities of Siberian and Volga Federal Districts (FD) from 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 47 RBLs and two WHO NICs. According to these data as a result of 2034 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 17.2%, including 3.0% for influenza А(H1N1)pdm09, 10.0% for influenza A(H3N2), 0.5% for influenza type A and 3.6% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Decrease of influenza and other ARI activity in Russia was registered during the week 15.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (59.1 per 10 000 of population) was lower than the national baseline (69.3) by 14.7%.

Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 17.2%, including 3.0% for influenza А(H1N1)pdm09, 10.0% for influenza A(H3N2), 0.5% for influenza type A and 3.6% for influenza type B virus.
Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 19.0% of investigated patients by IFA and 19.3% by PCR.
In sentinel surveillance system clinical samples from 89 SARI and ILI/ARI patients were investigated by rRT-PCR. Two influenza А(Н1N1)pdm09, 5 А(H3N2) and 5 influenza B cases were detected.

Antigenic characterization: Totally 335 influenza viruses were characterizated antigenically since start of 2013-2014 season including 79 A(H1N1)pdm09 strains, 241 A(H3N2) strains and 15 influenza type B strains. Antigenically 76 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. 238 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain and three strains were drift variants of A/Texas/50/12. Three influenza B strains were characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage, 9 influenza B strains were characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage and three strains were drift variants of B/Massachusetts/02/2012.

Genetic characterization: 3 influenza A(H1N1)pdm09 viruses were shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 3 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C).

Susceptibility to antiviral drugs. According to Munana-test investigations showed that 7 influenza A(H1N1)pdm09 viruses, 19 A(H3N2) viruses and 2 influenza type B were susceptible to oseltamivir.

http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
Re: Russia Influenza Surveillance 2013-2014

Week 18: 28.04.2014-04.05.2014

Influenza and ARI morbidity data

Epidemiological data show decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI & ARI morbidity level (45.0 per 10 000 of population) was lower than the national baseline (69.3) by 35.1%.
ILI and ARI epidemic thresholds were not exceeded in 59 cities of Russia collaborating with two WHO NICs in Russia.
...
Cumulative number of diagnosed influenza cases

Cumulative results of influenza laboratory diagnosis by different tests were submitted by 42 RBLs and two WHO NICs. According to these data as a result of 1405 patients investigation the overall proportion of respiratory samples positive for influenza was estimated as 17.9%, including 1.2% for influenza А(H1N1)pdm09, 9.7% for influenza A(H3N2), 0.4% for influenza type A and 7.9% for influenza type B virus.
...
Conclusion

Influenza and ARI morbidity data. Decrease of influenza and other ARI activity in Russia was registered during the week 18.2014 in traditional surveillance system in Russia. The nationwide ILI & ARI morbidity level (45.0 per 10 000 of population) was lower than the national baseline (69.3) by 35.1%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza was estimated as 17.9%, including 1.2% for influenza А(H1N1)pdm09, 9.7% for influenza A(H3N2), 0.4% for influenza type A and 7.9% for influenza type B virus.
Percent of positive ARI cases of non-influenza etiology (PIV, adeno- and RSV) was estimated as 15.2% of investigated patients by IFA and 9.9% by PCR.
In sentinel surveillance system clinical samples from 69 SARI and ILI/ARI patients were investigated by rRT-PCR. Two influenza А(Н1N1)pdm09, 4 А(H3N2) and 4 influenza B cases were detected.
Antigenic characterization: Totally 442 influenza viruses were characterizated antigenically since start of 2013-2014 season including 124 A(H1N1)pdm09 strains, 288 A(H3N2) strains and 30 influenza type B strains. Antigenically 121 influenza A(H1N1)pdm09 viruses were like influenza A/California/07/09 reference strain and three strains were drift variants of A/California/07/09. 285 A(H3N2) viruses were like influenza A/Texas/50/12 reference strain and three strains were drift variants of A/Texas/50/12. 6 influenza B strains were characterized as B/Brisbane/60/08-like, belonged to B/Victoria/02/87 lineage and one strain was drift variant of B/Brisbane/60/08, 20 influenza B strains were characterized as B/Massachusetts/02/2012-like, belonged to B/Yamagata/16/88 lineage and three strains were drift variants of B/Massachusetts/02/2012.
Genetic characterization: 3 influenza A(H1N1)pdm09 viruses were shown to be genetically related to clade represented by A/St.Peterburg/27/2011 virus, group 6 of A(H1)pdm09 virus. 6 influenza A(H3N2) viruses were belonged to clade represented A/Perth/16/2009 - A/Texas/50/2012 subgroup (3C). 2 influenza type B viruses were belonged to B Yamagata lineage - clade 3 represented by B/Wisconsin/1/2010 virus.
Susceptibility to antiviral drugs. According to Munana-test investigations showed that 7 influenza A(H1N1)pdm09 viruses, 42 A(H3N2) viruses and 2 influenza type B were susceptible to oseltamivir.

http://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/
 
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