Lugol's is best for Salmonella, Grapefruit-Seed-Extract if you have it will help. A Zapper unit will help but Salmonella sticks to the stomach and high doses of Lugol's will get rid of it from there:
Lugol’s Iodine solution (see Recipes) can quite quickly get
rid of Salmonella throughout the body. Use 6 drops (small drops
from an eyedropper) in ½ glass of water four times a day. If no
more Salmonella is consumed, it will be vanquished in a day or
two.
If your flu brings you a fever, use Lugol’s.
WARNING: Those instruction are from before we where depleted of Iodine so not sure how your daughter will react to 24 drops of Lugols....