Many species have other hosts between these two, such as fish or frogs. Trematodes usually have a pair of suckers for crawling and clinging to the host's tissues. Many humans are infected with blood flukes, liver flukes, lung flukes, and other trematode parasites of great medical importance.
Freeburg, IL. Freeburg is a village in St. Clair County, Illinois, United States. As of 2010, Freeburg had a population of 4,354. Freeburg lies in the fertile and rolling southern Illinois plains between the Kaskaskia and Mississippi Rivers. It was platted in 1836 as the town of Urbana by immigrants to this area from Virginia around 1800. The first European settlers of Freeburg were of English and Irish ancestry.
St. Clair County is the oldest county in the U.S. state of Illinois. According to the 2010 census, it had a population of 270,056, making it the eighth most populous county in Illinois and the most populous in the southern portion of the state. Its county seat is Belleville. The county was founded in 1790, before the establishment of Illinois itself, and contains the historic French settlement and former mission, Cahokia Village, founded 1697.