Figure 1. Seasonal variations in number of indicator bacterial parameters in representative natural springs. a) Total coliforms, b) enterococci, c) C. perfringens spores and d) E. coli. Parametric values for each indicator are given over the bar. Data is mean of three independent tests. “cfu” stands for colony forming units

From

An Investigation on the Bacterial Contents of Natural Springs in a Rural Area of the Middle Blacksea Region in Turkey

Alaa Aqso, Kübra Özkul, Haydar Karakaya

Applied Ecology and Environmental Sciences. 2014, 2(5), 123-129 doi:10.12691/aees-2-5-3