Ronan Kelly
Retired 2020
Influenza Surveillance in Ireland ? Weekly Report
Influenza Week 14 2015 (30th March ? 5th April 2015)
Summary
Overall, influenza activity decreased further in Ireland during the week ending 5th April 2015 (week 14 2015). Confirmed influenza outbreaks and hospitalisations continue to be reported at low levels.
Influenza-like illness (ILI): The sentinel GP influenza-like illness (ILI) consultation rate was 11.4 per 100,000 population in week 14 2015, a decrease compared to the updated rate of 16.4 per 100,000 population during week 13 2015.
o ILI rates remain below the Irish baseline threshold (18.2/100,000 population).
o Age specific ILI rates have decreased significantly in all age groups in recent weeks.
National Virus Reference Laboratory (NVRL):
o Influenza positivity decreased further during week 14 2015, with 37 (15.7%) influenza positive specimens reported from the NVRL: 7 A(H3) and 30 B.
o The number of influenza B positive specimens was higher than influenza A(H3) during weeks 12, 13 and 14 2015, however overall positive detections for both influenza A(H3) and influenza B are decreasing. For the season to date, influenza A(H3) viruses have predominated.
o No positive detections of respiratory syncytial virus (RSV), adenovirus or parainfluenza viruses were reported during week 14 2015. Sporadic cases of human metapneumovirus (hMPV) continue to be reported each week.
Respiratory admissions: The latest complete respiratory admissions data reported from sentinel hospitals decreased compared to recent weeks.
Hospitalisations: 35 confirmed influenza hospitalised cases were notified to HPSC during the week ending 5 th April 2015. For the 2014/2015 season to date, 830 confirmed influenza cases were reported as hospitalised. The median age of confirmed influenza hospitalised cases to date this season is 61 years.
Critical care admissions: No new confirmed influenza cases were admitted to critical care units and reported to HPSC during week 14 2015. To date this season, 46 confirmed influenza cases were admitted to critical care units and reported to HPSC: 22 associated with A(H3), eight with A(H1)pdm09, nine with influenza A (not subtyped) and seven with B. The median age of confirmed influenza cases admitted to critical care units to date this season is 68 years.
Mortality: Twenty-seven influenza-associated deaths have been reported to HPSC this season, with a median age of 81 years. Between weeks 2 - 10 2015, excess all-cause mortality was reported in Ireland in those aged 65 years and older.
Outbreaks: Three acute respiratory general outbreaks were reported to HPSC during the week ending 5 th April 2015: two outbreaks were associated with influenza A(H3) and one with influenza B. Of the 78 confirmed influenza outbreaks reported this season, the majority have been associated with influenza A(H3) in residential care facilities for the elderly.
International: Globally, influenza activity decreased further but remained above the seasonal threshold in the northern hemisphere. While influenza A(H3N2) viruses predominated this season, the proportions of influenza B and influenza A(H1N1)pdm09 detections have increased in the last few weeks.
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http://www.hpsc.ie/A-Z/Respiratory/...lanceReports/20142015Season/File,15093,en.pdf
Influenza Week 14 2015 (30th March ? 5th April 2015)
Summary
Overall, influenza activity decreased further in Ireland during the week ending 5th April 2015 (week 14 2015). Confirmed influenza outbreaks and hospitalisations continue to be reported at low levels.
Influenza-like illness (ILI): The sentinel GP influenza-like illness (ILI) consultation rate was 11.4 per 100,000 population in week 14 2015, a decrease compared to the updated rate of 16.4 per 100,000 population during week 13 2015.
o ILI rates remain below the Irish baseline threshold (18.2/100,000 population).
o Age specific ILI rates have decreased significantly in all age groups in recent weeks.
National Virus Reference Laboratory (NVRL):
o Influenza positivity decreased further during week 14 2015, with 37 (15.7%) influenza positive specimens reported from the NVRL: 7 A(H3) and 30 B.
o The number of influenza B positive specimens was higher than influenza A(H3) during weeks 12, 13 and 14 2015, however overall positive detections for both influenza A(H3) and influenza B are decreasing. For the season to date, influenza A(H3) viruses have predominated.
o No positive detections of respiratory syncytial virus (RSV), adenovirus or parainfluenza viruses were reported during week 14 2015. Sporadic cases of human metapneumovirus (hMPV) continue to be reported each week.
Respiratory admissions: The latest complete respiratory admissions data reported from sentinel hospitals decreased compared to recent weeks.
Hospitalisations: 35 confirmed influenza hospitalised cases were notified to HPSC during the week ending 5 th April 2015. For the 2014/2015 season to date, 830 confirmed influenza cases were reported as hospitalised. The median age of confirmed influenza hospitalised cases to date this season is 61 years.
Critical care admissions: No new confirmed influenza cases were admitted to critical care units and reported to HPSC during week 14 2015. To date this season, 46 confirmed influenza cases were admitted to critical care units and reported to HPSC: 22 associated with A(H3), eight with A(H1)pdm09, nine with influenza A (not subtyped) and seven with B. The median age of confirmed influenza cases admitted to critical care units to date this season is 68 years.
Mortality: Twenty-seven influenza-associated deaths have been reported to HPSC this season, with a median age of 81 years. Between weeks 2 - 10 2015, excess all-cause mortality was reported in Ireland in those aged 65 years and older.
Outbreaks: Three acute respiratory general outbreaks were reported to HPSC during the week ending 5 th April 2015: two outbreaks were associated with influenza A(H3) and one with influenza B. Of the 78 confirmed influenza outbreaks reported this season, the majority have been associated with influenza A(H3) in residential care facilities for the elderly.
International: Globally, influenza activity decreased further but remained above the seasonal threshold in the northern hemisphere. While influenza A(H3N2) viruses predominated this season, the proportions of influenza B and influenza A(H1N1)pdm09 detections have increased in the last few weeks.
...
http://www.hpsc.ie/A-Z/Respiratory/...lanceReports/20142015Season/File,15093,en.pdf