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Table 1 Characteristics of the tested cats for three influenza viruses and the seroprevalence of the sera against these influenza viruses

From: Serological survey of canine H3N2, pandemic H1N1/09, and human seasonal H3N2 influenza viruses in cats in northern China, 2010–2014

Characteristic

No. (%) samples a

No. (%) positive

H1N1/09 b

Canine H3N2 c

Human H3N2 d

Age (year)

    

≤2

455 (25.4%)

12 (2.6%)

2 (0.4%)

1 (0.2%)

3-6

463 (25.8%)

13 (2.8%)

4 (0.9%)

3 (0.6%)

7-9

334 (18.6%)

21 (6.3%)

2 (0.6%)

2 (0.6%)

≥10

542 (30.2%)

56 (10.3%)

4 (0.7%)

2 (0.4%)

  

P e < 0.001

P = 0.876

P = 0.754

Sex

    

Male

1028 (57.3%)

53 (5.2%)

5 (0.5%)

4 (0.4%)

Female

766 (42.7%)

49 (6.4%)

7 (0.9%)

4 (0.5%)

  

P = 0.261

P = 0.272

P = 0.676

Season

    

Spring (Mar–May)

578 (32.2%)

39 (6.7%)

2 (0.3%)

1 (0.2%)

Summer (Jun–Aug)

352 (19.6%)

15 (4.3%)

3 (0.9%)

1 (0.3%)

Autumn (Sep–Nov)

446 (24.9%)

22 (4.9%)

4 (0.9%)

4 (0.9%)

Winter (Dec–Feb)

418 (23.3%)

26 (6.2%)

3 (0.7%)

2 (0.5%)

  

P = 0.356

P = 0.694

P = 0.357

  1. aHI positive samples were analyzed. bH1N1/09 is A/Beijing/7/2009 (H1N1). cCanine H3N2 is A/canine/Beijing/359/2009 (H3N2). dHuman H3N2 is A/Beijing/126/2012 (H3N2). ePearson’s χ2 test was used to compare the differences between groups.