With the onset of summer and rise in mercury gastroenteritis has again struck the areas, which lack access to clean drinking water, with more than 100 patients reporting at the Nawabshah Medical College Hospital (NMCH) and other health centres during last 24 hours. On an average, 40-50 gastroenteritis patients report daily at the NMCH for a couple of days. A gastroenteritis patient complains of vomiting and diarrhoea or cramps.