South Africa Influenza Surveillance 2016

[Ronan Kelly]

Link to 2015 thread: https://flutrackers.com/forum/forum/...veillance-2015

Link to NICD Surveillance Page: http://www.nicd.ac.za/?page=seasonal_influenza&id=72

Week 22: http://www.nicd.ac.za/assets/files/I...2022_2016.docx

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Reporting period 01/01/2016 to 05/06/2016 Results until end of epidemiologic week 22 (2016)
Comments

Influenza The 2016 influenza season started in week 19 (week starting 9 May) when the Viral Watch detection rate rose to 19% and continued to rise/remain above 10%. ILI programme: In 2016 to date, specimens from 542 patients were received from 2 ILI sites. Influenza A(H1N1)pdm09 was detected in four specimens, influenza A(H3N2) in three, and influenza B in 33 patients. Viral Watch programme: During the same period, specimens from 262 patients were received from Viral Watch sites. Influenza A(H1N1)pdm09 was detected in two patients, influenza A(H3N2) in one, and influenza B in 48 patients. Pneumonia surveillance: In this time period, specimens from 1508 patients with severe respiratory illness (SRI) were received from the 6 sentinel sites. Influenza A(H3N2) was detected in the specimen of one, and influenza B in 31 patients. Respiratory syncytial virus The 2016 RSV season which started in week 8 (week ending 28 February) continues, with a detection rate of 53% in pneumonia patients in week 18. In 2016 to date RSV has been detected in the specimens of 54 patients in the ILI programme, 19 from the Viral Watch and 375 from patients in the pneumonia surveillance programme.

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Figure 3. Number of positive samples* by influenza types and subtypes and detection rate** by week


*Specimens from patients with Influenza-like illnesses at 104 sentinel sites in 8 provinces
** Only reported for weeks with >10 specimens submitted.


Table 3. Cumulative number of influenza type and subtype and total number of samples tested by province




To date in 2016, 10 patients have been tested for influenza at the time of entry into South Africa following travel abroad and 3 have tested influenza positive.
Patients known to have acquired influenza abroad are not included in the table or epidemiological curve.
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[Ronan Kelly]

Week 31: http://www.nicd.ac.za/assets/files/I...%2031_2016.pdf

Reporting period 01/01/2016 to 07/08/2016 Results until end of epidemiologic week 31 (2016

Influenza
The 2016 influenza season which started in week 19 (week starting 9 May) when the Viral Watch detection rate
rose to 19% continues.
ILI programme: In 2016 to date, specimens from 985 patients were received from 2 ILI sites. Influenza A not
subtyped was detected in one specimen, influenza A(H1N1)pdm09 in 14, influenza A(H3N2) in 38, and influenza B
in 96 patients.
Viral Watch programme: During the same period, specimens from 711 patients were received from Viral Watch
sites. Influenza A not subtyped was detected in one patient, influenza A(H1N1)pdm09 in 24, influenza A(H3N2) in
92, and influenza B in 176 patients.
Pneumonia surveillance: In this time period, specimens from 2231 patients with severe respiratory illness (SRI)
were received from the 6 sentinel sites. Influenza A(H1N1)pdm09 was detected in the specimens of five, influenza
A(H3N2) in 26 and influenza B in 92 patients.

Influenza-like illness (ILI) surveillance primary health care clinics
Figure 1. Number of positive samples* by influenza types and subtypes and detection rate** by
week


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