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Table 1 Number of first reported reassortant isolates stratified by host and region

From: A systematic review of reported reassortant viral lineages of influenza A

  Africa Asia Australia China Europe Japan Middle East Russia South America US Total (Host)
Aquatic Bird 1 (38) (0–5.2) 25 (674) (16.2–36.5) 1 (100) (0–5.22) 113 (953) (94.0–134.1) 22 (294) (13.8–33.1) 6 (75) (2.24–12.4) 0 (6) (0–2.7) 3 (51) (0.6–8.2) 0 (11) (0–3.1) 67 (4,289) (52–84.9) 238 (6,491) (209.1–269.0)
Equine 0 (2) (0–1.68) 0 (2) (0–1.6) 0 (0–0) 0 (13) (0–3.2) 1 (20) (0–4.97) 0 (6) (0–2.7) 0 (1) (0–0.9) 0 (0–0) 0 (5) (0–2.6) 0 (54) (0–3.5) 1 (103) (0–5.4)
Human 0 (63) (0–3.5) 4 (1,426) (1.1–10.2) 4 (1,016) (1.1–10.2) 10 (915) (4.8–18.3) 11 (1,020) (5.5–19.5) 5 (168) (1.6–11.4) 0 (40) (0–3.5) 0 (110) (0–3.6) 0 (495) (0–3.6) 28 (4,382) (18.6–40.4) 62 (9,635) (47.5–79.4)
Other Aviana 1 (19) (0–3.3) 5 (82) (1.6–11.2) 0 (3) (0–2.1) 38 (387) (27.2–51.1) 0 (17) (0–3.31) 0 (31) (0–3.4) 1 (25) (0.2–6.5) 0 (4) (0–2.4) 0 (1) (0–0.9) 0 (95) (0–3.6) 45 (664) (33.1–59.5)
Otherb 0 (0) (0–0) 1 (53) (0–5.33) (0) (0–0) 6 (90) (2.2–12.5) 0 (5) (0–2.6) 0 (0) (0–0) 0 (0) (0–0) 0 (1) (0–0.9) (0) (0–0) 2 (221) (0.2–7.1) 9 (370) (4.1–16.9)
Poultry 6 (177) (2.2–12.8) 28 (448) (18.7–39.9) 0 (9) (0–3) 70 (622) (55.2–87.1) 4 (121) (1.1–9.9) 0 (35) (0–3.5) 2 (90) (0.2–7) 2 (18) (0.2–6.2) 0 (4) (0–2.4) 8 (239) (3.4–15.5) 120 (1,763) (100.0–142.5)
Swine 0 (2) (0–1.6) 21 (166) (14.2–31.6) 0 (3) (0–2.1) 56 (508) (43.7–72.6) 18 (166) (10.1–26.3) 5 (30) (1.69–10.4) (0) (0–0) (0) (0–0) 2 (9) (0.2–5.4) 69 (868) (55–87.4) 171 (1,752) (147. 3–197.0)
Total (Region) 8 (301) (2.8–14.2) 84 (2,851) (68.0–104.7) 5 (1,131) (1.6–11.6) 293 (3,488) (262.5–327.8) 56 (1,643) (41.6–71.2) 16 (345) (9.2–25.6) 3 (162) (1.1–10) 5 (184) (1.6–11.4) 2 (525) (0.2–7.1) 174 (10,148) (150.2–202.6) 646 (20,778) (600.0–699.0)
  1. All regions and hosts for which data on reported reassortants was identified. Data indicated in the top row of each box shows the number of reassortants identified, to the left in brackets is the total number of isolates for each region and host type available in GenBank for all eight gene segments. Data below in italics indicates the 95 % binomial confidence intervals. Other aviana as a host group includes isolates from pheasants, sparrows, quails, partridges, chukkars. Otherb as a host group includes reassortants from environmental samples- surface water and canines