New Zealand Influenza Surveillance 2016

[Ronan Kelly]

Community and Hospital Surveillance
ILI, SARI, Influenza and Respiratory Pathogens
2016 Influenza Season, Week 33, ending 21 August 2016
https://surv.esr.cri.nz/PDF_surveill...kRpt201633.pdf

During week 33 (15?21 August 2016), influenza activity was very low among consultation-seeking
patients nationwide. Influenza activity was also very low among those hospitalised patients in Auckland
and Counties Manukau District Health Boards.

 Influenza-like illness (ILI) and severe acute respiratory illness (SARI) surveillance
ILI surveillance: One hundred and seventeen patients with influenza-like illness consulted sentinel
general practices in 20 DHBs. The weekly ILI incidence was 22.2 per 100 000 patient population
(Figure 1), below the seasonal threshold of ILI consultations. The ILI related influenza incidence
(adjusted) was 10.2 per 100 000 patient population.

SARI surveillance: There were 2740 acute admissions to ADHB and CMDHB hospitals this week. Of
the 194 patients with suspected respiratory infections, 82 (42.3%) patients met the SARI case
definition. Five SARI cases were admitted to ICU and no SARI related deaths were reported. The
weekly SARI incidence was 6.6 per 100 000 population. The SARI related influenza incidence was 0.6
per 100 000 population.

 Respiratory pathogen surveillance
Influenza virus: During this week, 48 ILI specimens were tested, 22 were positive for influenza
viruses. In addition, 28 SARI specimens were tested, five were positive for influenza viruses. For
details, see Table 3 and Figures 5 and 6.

Non-influenza respiratory viruses: For cumulative totals, see Table 4 and Figures 7 and 8.

ILI counts and rates by DHB by week are available in the Appendix.

[Ronan Kelly]

Community and Hospital Surveillance
ILI, SARI, Influenza and Respiratory Pathogens
2016 Influenza Season, Week 34, ending 28 August 2016
https://surv.esr.cri.nz/PDF_surveill...kRpt201634.pdf

During week 34 (22?28 August 2016), influenza activity was very low among consultation-seeking
patients nationwide. Influenza activity was also very low among those hospitalised patients in Auckland
and Counties Manukau District Health Boards.

 Influenza-like illness (ILI) and severe acute respiratory illness (SARI) surveillance
ILI surveillance: One hundred and four patients with influenza-like illness consulted sentinel general
practices in 20 DHBs. The weekly ILI incidence was 19.7 per 100 000 patient population (Figure 1),
below the seasonal threshold of ILI consultations. The ILI related influenza incidence (adjusted) was
11.9 per 100 000 patient population.

SARI surveillance: There were 2706 acute admissions to ADHB and CMDHB hospitals this week. Of
the 188 patients with suspected respiratory infections, 72 (38.3%) patients met the SARI case
definition. Five SARI cases were admitted to ICU and no SARI related deaths were reported. The
weekly SARI incidence was 5.9 per 100 000 population. The SARI related influenza incidence was 1.5
per 100 000 population.

 Respiratory pathogen surveillance
Influenza virus: During this week, 58 ILI specimens were tested, 35 were positive for influenza
viruses. In addition, 47 SARI specimens were tested, 16 were positive for influenza viruses. For details,
see Table 3 and Figures 5 and 6.

Non-influenza respiratory viruses: For cumulative totals, see Table 4 and Figures 7 and 8.

ILI counts and rates by DHB by week are available in the Appendix.

[Ronan Kelly]

Community and Hospital Surveillance
ILI, SARI, Influenza and Respiratory Pathogens
2016 Influenza Season, Week 36, ending 11 September 2016
https://surv.esr.cri.nz/PDF_surveill...kRpt201636.pdf

During week 36 (5?11 September 2016), influenza activity was very low among consultation-seeking
patients nationwide. Influenza activity was also low among those hospitalised patients in Auckland and
Counties Manukau District Health Boards.

 Influenza-like illness (ILI) and severe acute respiratory illness (SARI) surveillance
ILI surveillance: Fifty-three patients with influenza-like illness consulted sentinel general practices in
20 DHBs. The weekly ILI incidence was 10.1 per 100 000 patient population (Figure 1), below the
seasonal threshold of ILI consultations. The ILI related influenza incidence (adjusted) was 4.4 per
100 000 patient population.

SARI surveillance: There were 2810 acute admissions to ADHB and CMDHB hospitals this week. Of
the 181 patients with suspected respiratory infections, 75 (41.4%) patients met the SARI case
definition. Four SARI cases were admitted to ICU and no SARI related deaths were reported. The
weekly SARI incidence was 6.7 per 100 000 population. The SARI related influenza incidence was 0.9
per 100 000 population.

 Respiratory pathogen surveillance
Influenza virus: During this week, 23 ILI specimens were tested, 10 were positive for influenza
viruses. In addition, 39 SARI specimens were tested, eight were positive for influenza viruses. For
details, see Table 3 and Figures 5 and 6.

Non-influenza respiratory viruses: For cumulative totals, see Table 4 and Figures 7 and 8.

ILI counts and rates by DHB by week are available in the Appendix.
...

[Ronan Kelly]

Community and Hospital Surveillance
ILI, SARI, Influenza and Respiratory Pathogens
2016 Influenza Season, Week 37, ending 18 September 2016
https://surv.esr.cri.nz/PDF_surveill...kRpt201637.pdf


During week 37 (12?18 September 2016), influenza activity was very low among consultation-seeking
patients nationwide. Influenza activity was also low among those hospitalised patients in Auckland and
Counties Manukau District Health Boards.

 Influenza-like illness (ILI) and severe acute respiratory illness (SARI) surveillance
ILI surveillance: Forty-eight patients with influenza-like illness consulted sentinel general practices in
20 DHBs. The weekly ILI incidence was 9.1 per 100 000 patient population (Figure 1), below the
seasonal threshold of ILI consultations. The ILI related influenza incidence (adjusted) was 4.9 per
100 000 patient population.

SARI surveillance: There were 2934 acute admissions to ADHB and CMDHB hospitals this week. Of
the 170 patients with suspected respiratory infections, 71 (41.8%) patients met the SARI case
definition. No SARI cases were admitted to ICU and no SARI related deaths were reported. The weekly
SARI incidence was 5.6 per 100 000 population. The SARI related influenza incidence was 0.4 per
100 000 population.

 Respiratory pathogen surveillance
Influenza virus: During this week, 30 ILI specimens were tested, 16 were positive for influenza
viruses. In addition, 24 SARI specimens were tested, four were positive for influenza viruses. For
details, see Table 3 and Figures 5 and 6.

Non-influenza respiratory viruses: For cumulative totals, see Table 4 and Figures 7 and 8.

ILI counts and rates by DHB by week are available in the Appendix.

[Ronan Kelly]

Community and Hospital Surveillance
ILI, SARI, Influenza and Respiratory Pathogens
2016 Influenza Season, Week 38, ending 25 September 2016
https://surv.esr.cri.nz/PDF_surveill...kRpt201638.pdf

During week 38 (19?25 September 2016), influenza activity was very low among consultation-seeking
patients nationwide. Influenza activity was also low among those hospitalised patients in Auckland and
Counties Manukau District Health Boards.

 Influenza-like illness (ILI) and severe acute respiratory illness (SARI) surveillance
ILI surveillance: Forty-eight patients with influenza-like illness consulted sentinel general practices in
20 DHBs. The weekly ILI incidence was 8.9 per 100 000 patient population (Figure 1), below the
seasonal threshold of ILI consultations. The ILI related influenza incidence (adjusted) was 3.0 per
100 000 patient population.

SARI surveillance: There were 2910 acute admissions to ADHB and CMDHB hospitals this week. Of
the 167 patients with suspected respiratory infections, 80 (47.9%) patients met the SARI case
definition. Six SARI cases were admitted to ICU and no SARI related deaths were reported. The
weekly SARI incidence was 5.6 per 100 000 population. The SARI related influenza incidence was 1.2
per 100 000 population.

 Respiratory pathogen surveillance
Influenza virus: During this week, 21 ILI specimens were tested, seven were positive for influenza
viruses. In addition, 38 SARI specimens were tested, 13 were positive for influenza viruses. For details,
see Table 3 and Figures 5 and 6.

Non-influenza respiratory viruses: For cumulative totals, see Table 4 and Figures 7 and 8.

ILI counts and rates by DHB by week are available in the Appendix.