Home PageDanger in the river: what you could catch | London Evening StandardCampylobacter:The Standard13 April 2012Danger in the river: what you could catchCampylobacter:Salmonella: Diarrhoea and headaches.The bacteria may enter the lymph tracts, which carry water and protein to the blood, and the blood itself.E.coli: Infection may produce mild diarrhoea, or severe or fatal illness.