USDA maintains Mexican cattle imports despite screwworm caseUSDA will not reinstate restrictions on cattle imports from Mexico after another case of New World screwworm was detected in a cow in Tabasco state. Spot milk prices range from $2 under Class III to flat Class. Cheesemakers reported spot milk prices between $2-under to Class III. Cream demand from other Classes is ticking up, but they have not yet made a substantial impact on cream deposits. Low/medium heat nonfat dry milk prices slipped in all regions.