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Volume 16, Number 10—October 2010


Pandemic (H1N1) 2009 and Seasonal Influenza A (H1N1) Co-infection, New Zealand, 2009

Matthew PeaceyComments to Author , Richard J. Hall, Stephanie Sonnberg, Mariette Ducatez, Shevaun Paine, Mackenzie Nicol, Jacqui C. Ralston, Don Bandaranayake, Virginia Hope, Richard J. Webby, and Sue Huang
Author affiliations: Author affiliations: The Institute of Environmental Science and Research, Upper Hutt, New Zealand (M. Peacey, R.J. Hall, S. Paine, M. Nicol, J.C. Ralston, D. Bandaranayake, V. Hope, S. Huang); St. Jude Children’s Research Hospital, Memphis, Tennessee, USA (S. Sonnberg, M. Ducatez, R.J. Webby); Australian National University, Canberra, Australian Capital Territory, Australia (S. Paine)

Main Article


Characteristics of 13 nonhospitalized patients co-infected with seasonal influenza A (H1N1) and pandemic (H1N1) 2009, New Zealand, June 2009*

Patient no. rRT-PCR results, Ct
Patient characteristics
Sample type Pandemic (H1N1) 2009 Seasonal A (H1N1) Age, y/ sex Ethnicity Location Date of onset Received vaccination† Received antiviral drug
1 Clinical 22.74 18.13 29/F E Manakau 14 No Yes
2 Clinical 32.26 23.84 10/M M Rotorua 15 No No
3 Clinical 23.97 17.87 13/M M Wellington 17 No No
4 Clinical 26.04 32.96 18/F E Waikato 22 No U
5 Clinical 22.67 34.68 22/F ME Wellington 22 Yes No
6 Clinical 22.78 35.24 19/F M Bay of Plenty 23 Unknown No
7 Clinical 18.03 33.58 36/M E Hamilton 23 No Yes
8 Clinical 20.65 32.92 31/F E Hamilton 23 No No
9 Clinical 23.69 31.5 24/F M Hamilton 24 No No
10 Isolate 15.09 13.52 51/F E Hamilton 26 No No
11 Clinical 30.77 22.76 21/F U Dunedin 28 No Yes
12 Clinical 25.1 36.62 16/F M Rotorua 29 No No
13 Isolate 29.93 12.54 17/F E, M Manukau 30 No Yes

*rRT-PCR, real-time reverse transcription–PCR; Ct, cycle threshold; E, European; M, Maori; ME, Middle Eastern; U, unknown.
†Patient history of receipt of seasonal influenza vaccination.

Main Article