Different animals will have different E. coli and will have greater DNA patterns because there are more animal species.
Humans have fewer DNA patterns.
About 90 percent of all Florida oysters are harvested in the Apalachicola Bay area. Lee Edmiston, research coordinator at the Apalachicola Bay reserve who helped collect water samples for the two-year survey, said bacteria from pollutants causes fecal coliform counts to rise. When the counts get too high, the state, fearing illness from consumption of raw oysters, closes the bay to oyster harvesting. There was never a way to differentiate that before this research. Initial testing pointed the finger in both directions, the UF scientists found.