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Table 2 Virus detection and titers in tissues from broiler breeders and SPF White Leghorn chickens inoculated with Tennessee 2017 H7N9 LPAI or HPAI viruses

From: Pathobiology of Tennessee 2017 H7N9 low and high pathogenicity avian influenza viruses in commercial broiler breeders and specific pathogen free layer chickens

Bird type (age) Pathotype Day post-challenge No. with virus detected/total (titer as log10 EID50/g)d
Lung Spleen Heart Brain Muscle Reproductive tracte
Broiler breeders (36w)a LP 3 0/3 0/3 0/3 0/3 0/3 0/3
SPF White Leghorn (4w)b LP 3 0/2 0/2 0/2 0/2 0/2 nd
SPF White Leghorn (4w)c HP 2 2/2 (7.2 ± 0.3) 2/2 (7.3 ± 0.2) 2/2 (8.3 ± 0.3) 2/2 (7.0 ± 0.6) 2/2 (7.5 ± 0.4) nd
  1. Virus detection by qRRT-PCR.
  2. nd: not determined.
  3. aTissues from 3 broiler breeders necropsied at 3 dpc. The threshold of detection in tissues was 1.9 log10 EID50/g for H7N9 LPAI virus.
  4. bTissues from 2 SPF layer birds necropsied at 3 dpc. The threshold of detection in tissues was 1.9 log10 EID50/g for H7N9 LPAI virus.
  5. cTissues from 2 SPF layer birds necropsied at 2 dpc. The threshold of detection in tissues was 2.5 log10 EID50/g for H7N9 HPAI virus.
  6. dMean titer ± SD.
  7. eAll sections of the reproductive tract were tested: ovary, infundibulum, magnum, isthmus, and shell gland.
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Veterinary Research

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