In the first four months of the year alone, 33 countries reported more than 6,500 cases.

More than 30 countries have reported having citizens killed or missing in the collapse of the buildings.

The two countries have reported little progress, but the talks continue.

Some countries have reported an increase in resistance to pyrethrin.

All countries must report back within 30 days on what measures they had taken.

By late 2003, just six countries were reporting new cases - a total of fewer than 800 in the world.

In the last 18 months, 34 countries have reported outbreaks.

In 2008, 19 countries reported cases and the total number of cases was 1,652.

All those previously-infected countries did not report a case in 2012.

One country, he said, had reported 56 people feared to be missing at the site.