Medical Definition of Sulfa drug Sulfa drug: One of the sulfonamides, the sulfa-related antibiotics which are used to treat bacterial and some fungal infections. The first sulfa drug was prontosil. It was discovered by the German physician and chemist Gerhard Domagk in 1935. Sulfa drugs kill bacteria and fungi by interfering with their metabolism. They were the wonder drugs before penicillin and are still used today.
NEXT STEP. Find out how much your project will cost. Provide a few details about your project and receive competitive quotes from local pros. The average national cost to install a geothermal heating or cooling system is $5,745, with most homeowners spending between $3,534 and $11,089.
Geothermal heating is the direct use of geothermal energy for heating some applications. Humans have taken advantage of geothermal heat this way since the Paleolithic era. Approximately seventy countries made direct use of a total of 270 PJ of geothermal heating in 2004. As of 2007, 28 GW of geothermal heating capacity is installed around the world, satisfying 0.07% of global primary energy consumption.