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. 2018 Dec;24(12):2309–2316. doi: 10.3201/eid2412.180879

Table 1. Prevalence of avian influenza A(H5) and A(H9) viruses in pooled poultry and environmental samples, Chittagong and Dhaka, Bangladesh*.

Sample type
No. pools
A(H5) virus prevalence, %
A(H9) virus prevalence, %
Observed pool level
Estimated bird level (95% HDI)†
Observed pool level
Estimated bird level (95% HDI)†
Poultry
Retail LBM
Broiler 96 5.2 0.9 (0–9.4) 37.5 10.8 (2.3–22.5)
Sonali 62 3.2 1.4 (0–13.2) 32.3 6.6 (1.2–14.5)
Desi 61 3.4 1.3 (0–12.2) 29.5 6.8 (1.3–14.9)
Waterfowl
20
50.0
8.1 (0–46.8)

25.0
2.8 (0.3–7.0)
Mixed LBM
Broiler 57 1.8 0.9 (0–4.0) 47.4 13.1 (1.2–30.1)
Sonali 60 10.0 1.4 (0–5.7) 31.7 8.0 (0.4–19.8)
Desi 66 9.1 1.3 (0–5.2) 39.4 8.3 (0.5–20.4)
Waterfowl
55
27.3
7.6 (0–24.6)

16.4
3.4 (0.1–9.7)
Environmental site
Retail LBM
Stall area 101 5.9 1.5 (0–10.4) 16.8 3.2 (0.1–9.1)
Slaughter area 99 7.1 1.4 (0–10.1) 25.3 6.2 (0.2–16.6)
Mixed LBM
Stall area 102 15.7 3.1 (0–11.3) 23.5 5.2 (0.1–14.1)
Slaughter area 98 14.3 3.0 (0–11.0) 37.8 9.9 (0.4–25.0)

*Desi, which means “local” in Bengali, are indigenous chicken breeds raised in backyard farms. Sonali is a cross-breed of the Rhode Island Red cocks and Fayoumi hens. HDI, high-density interval; LBM, live bird market.
†Bird and environmental swab specimen–level prevalence in contaminated live bird markets. Median values are reported.