Since bacteria are too small to be seen, it is very hard to deal with them. The housekeeper has the following ways of protecting the household:
(1) By having all drain pipes trapped:
(2) By keeping the house free from lodging places for bacteria:
(a) Keep the house clean and free of dust.
(b) Wash garbage pails and sinks daily and scald them and drain pipes at least once a week.
(c) Keep the refrigerators, cupboards, and receptacles for food clean, and allow no spoiled food to remain in them.
(d) Wash and sterilize the soiled clothing once a week.
(e) Keep the cellar well aired and clean; allow no decaying material to remain in it.
(f) Keep the door-yards clean; allow no scraps of food, cleaning water, or sweepings to be thrown near the house.
(3) By keeping the supply of food from disease-producing bacteria: