Dengue continues to spread across Florida, and health officials are under pressure over possible underreporting.

The article says local authorities report a surge and emergency responses in multiple counties.

Hillsborough County is described as the center of the regional outbreak.

That county declared a state of emergency to speed mosquito control, and later extended it.

Neighboring Florida counties took similar steps to reduce local mosquito populations.

Research teams increased field studies of local transmission, the article says.

Officials are asking residents to reduce breeding sites around homes and to guard against bites.

The piece says incomplete case counts make it harder to aim mosquito control and public warnings.

Read the full article on Florida's dengue outbreak and the underreporting concern.