Interventions in live poultry markets for the control of avian influenza: A systematic review

Offeddu, Vittoria; Cowling, Benjamin J.; Peiris, J.S. Malik

In contrast, long-term risk reduction following the implementation of a regular LPM rest day was less evident (Table 2) [20, 21, 26] . For instance, weekly rest days in Guangzhou's retail LPMs (rLPM) induced a significant risk reduction of AIV-detection from environmental specimens (RRR = 0.34; 95% CI = 0.08-0.53), but not from animal samples a LPM closure effectiveness expressed as 1-IRR; IRR = ratio of H7N9-incidence rate after LPM closure/H7N9-incidence rate before LPM closure. b Quantitative estimate not provided; authors reported a significant deceleration after LPM closure, outside of the confidence bounds predicted by the pre-intervention model. [26] . Similarly, the introduction of a monthly rest day in Hong Kong's markets did not elicit a significant sustained risk reduction of H9N2isolation between interventions [20] and the long-term impact of the bimonthly rest day (RRR = 0.37; 95% CI = 0.24-0.48) [20] was not entirely consistent across studies [21] . Over the years, only the overnight poultry storage ban elicited a sustained and highly significant risk reduction of H9N2-isolation (RRR = 0.96; 95% CI = 0.93-0.98) [21] .