You can not always tell polluted water by its appearance, smell or taste. Unless from a sewer or drain, it may look clear and sparkling with no smell and have a pleasant taste, so water that is not known tbe pure should not be drunk 1468. Vegetables as a distributer of disease. Flies carry germs from privies, latrines, spittoons and sick rooms tothe food on your table, by mean, of their smeared feet, in their spit or in their specks. The dog as a distributed of disease .
Dogs are often distributors of disease.
They use their tongues for toilet paper and afterwards lick their coat or the hands of their friends. Petting dogs or letting them lick our hand is dangerous. How to avoid swallowing disease. If you have no one to ask and are travelling, it is safer to drink tea or coffee, because they have been made front boiled water, or to drink bottled mineral waters. In the field boil your drinking water.