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Table 4 HI titres of sera collected from UDL-01/08 virus infected and contact birds

From: Infectivity and transmissibility of H9N2 avian influenza virus in chickens and wild terrestrial birds

Species Infection route Pre-infection HI titre 7 dpi 14 dpi Day 21 dpi 28 dpi
Number of birds positive for HI / total birds
log2HI titer range (GMT)
Broiler Infected <2 10/10 10/10 10/10 10/10
5–8 (6.2) 7–9 (8.0) 8–9 (8.4) 8–9 (8.4)
Contact <2 5/5 5/5 5/5 5/5
3–6 (4.1) 5–7 (5.7) 8–9 (8.3) 8–10 (8.9)
Layer Infected <2 10/10 10/10 10/10 10/10
5–8 (6.1) 7–9 (8.0) 8–9 (8.4) 8–9 (8.6)
Contact <2 0/5 5/5 5/5 5/5
<2 5–7 (6.0) 8–9 (8.4) 8–9 (8.4)
Jungle fowl Infected <2 9/10 10/10 10/10 10/10
7–9 (7.5) 9–10 (9.1) 9–10 (9.6) 9–10 (9.6)
Contact <2 0/5 5/5 5/5 5/5
<2 6–8 (7.4) 9–10 (9.6) 9–10 (9.6)
Quail Infected <2 8/8 8/8 8/8 8/8
6–8 (7.5) 7–10 (8.6) 8–10 (8.9) 9–10 (9.4)
Contact <2 0/5 5/5 5/5 5/5
<2 7–9 (7.8) 8–9 (8.6) 8–9 (8.6)
Sparrow Infected <2 10/10 10/10 10/10 10/10
5–8 (6.5) 7–9 (8.2) 8–10 (8.8) 9–10 (9.7)
Contact <2 0/5 5/5 5/5 5/5
<2 7–9 (7.6) 8–10 (8.8) 8–9 (8.1)
Crow Infected <2 0/10 0/10 10/10 10/10
<2 <2 4–9 (6.9) 5–9 (7.7)
Contact <2 0/5 0/5 0/5 0/5
<2 <2 <2 <2
  1. GMT, Geometric mean titers; dpi, days post infection. HI titres <2 were regarded as baseline detection and were considered negative for seroconversion. Infected birds were inoculated with 106.6 EID50 UDL-01/08 virus. Swab samples were inoculated into EHE and virus was detected by HA assay. Contact birds are indicated in bold.