Nepal is on alert as bird flu cases rise, prompting quarantines and the culling of over half a million birds.

Nepal has culled 600,000 birds as H5N1 sweeps Kathmandu, closing the capital’s only zoo and raising fears it could mutate to infect humans.

KATHMANDU: Nepal is battling a surge in bird flu cases, and has slaughtered more than 596,000 poultry and shut its only zoo, agriculture ministry officials said Tuesday. The…