The number of rat lungworm cases confirmed by the State Department of Health has been growing since the department began tracking them a decade ago. For the first 8 years, there were 65 cases in the state. But numbers are increasing – 12 last year, and 17 so far in 2017. Most of the cases have been on the Big Island—65 out of 78. But this year there have also been 6 cases on Maui and one on O'ahu. HPR contributing reporter Sherry Bracken spoke with a pair of medical professionals working on the spread of rat lungworm on the Big Island, and has an update.