Strict microbiological standards make this method a reliable indicator of fecal contamination. The introduction of water purification measures is probably the single most important public health measure ever devised. A variety of bacteria, viruses, and protozoa are involved. Recent massive outbreaks in developed countries and the newest cholera pandemic, emphasize the need for maintaining high standards for water quality. Outline at least two different sources of waterborne infection other than drinking water.
Outline steps to reduce their impact.
Section 24.9 Food microbiology deals with methods for keeping microorganisms, including pathogens, from growing in food during processing and storage. Foods vary considerably in their sensitivity to microbial growth, depending on their nutrient content, water content, and pH. Heat, refrigeration, or chemical agents can control microbial growth in foods. Give examples to support your answer. Outline at least four methods of food preservation. Many microbial diseases are foodborne.