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Prevalence of Campylobacter spp. isolated from surface waters at five sites on the River Wyre and River Mersey by 4-week period, 2004-2005. All isolates were successfully sequence typed. The total number of samples obtained in each 4-week period (hatched area) varied through the year, but all sampling sites are represented in the data, except for weeks 29 to 40 in 2005, when the River Wyre was not sampled.
