Are there official recommendations for treating amniotic infection?

Usually delivery. An amniotic infection will most often result in spontaneous labor and delivery. When labor does not happen spontaneouly, the usual management is to induce labor or proceed with a cesarean delivery, if cesarean delivery is indicated. In either case (labor or cesarean), antibiotics would be initiated and very likely continued well after delivery for both the mom and the baby.
Abtx & delivery. The mainstay of care is antibiotics and delivery. Early treatment will reduce the risk of advancement of the infection to baby and mom. Cesarean delivery will not improve the care, and the route of delivery should be determined by other obstetrical factors.