Paratyphoid cannot survive in an acid environment below a Ph of 4.5. This product will stop the transference of Paratyphoid through the droppings. If you use litter on your floor, apply this mixture at the rate of 2 lbs. per 100 square feet of floor (lasts 6 months). If you scrape daily, sift lightly after you clean. Loft Dressing 3 lbs.