求翻译：（1）使水生物和人感染的大量细菌、寄生虫甚至病毒。这些细菌能引起伤寒、副伤寒、疟疾、痢疾、胃肠炎和霍乱等肠道传染病及寄生虫病；是什么意思？

(1) a large number of aquatic organisms and human infection of bacteria, parasites and even viruses. These bacteria can cause typhoid fever, paratyphoid fever, malaria, dysentery, gastroenteritis and cholera and other diarrheal diseases and parasitic diseases;

(1) make the water creatures and people are infected with the large quantities of bacterial, parasitic or even a virus. These bacteria can cause typhoid fever, paratyphoid fever, malaria, dysentery, cholera, and gastro-enteritis and intestinal infectious diseases and parasites.