The transmission of intestinal infectious diseases include: 1, spread by water, the main diseases are cholera, typhoid, bacillary dysentery, these three diseases are known as the three major water-borne diseases. 2, spread by food, that is, through eating. 3, contact transmission, hand washing is not clean, through the food brought into the body. 4, worm transmission: summer and autumn. This is also the most common way of transmission. 2, spread by food, that is, through eating and infection. 3, contact transmission, hand washing is not clean, contact with germs, through food brought into the body. 4, insect transmission: flies, cockroaches and other insects in the summer and autumn, they can carry some pathogenic bacteria, contaminated food, etc.. Resulting in the spread of intestinal infections in the population.