MENDOTA, Calif. (AP) — Farmers in the nation's top cantaloupe-producing states of California and Arizona are still feeling the pains from a listeria outbreak.The industry continues to struggle, even though the tainted cantaloupes traced to Colorado should be out of stores now because their shelf life is about two weeks.One California company was forced to lay off 150 of its 400 workers just weeks before the end of the harvest season.The reason: a perception by consumers the fruit still isn't safe to eat. Experts say it could be a long dry spell before sales return to anywhere close to normal.The outbreak has been linked to at least 116 sicknesses and 23 deaths, making it the deadliest known outbreak of foodborne illness in the U.S. in more than 25 years.