Top chains may suffer a backlash that lingers

Concerns about restaurant safety expected to affect supply system

Leading fast food chains in China - McDonald's, KFC and Pizza Hut - are expected to suffer a lingering impact from recent media reports involving a food supplier allegedly using meat products past their expiration dates.

Shanghai's Food and Drug Administration said it was investigating the claims that Shanghai Husi Food Co, which is solely owned by Chicago-based food company OSI Group and has 10 factories in the country, was selling chicken and beef that had exceeded its sell-by date.