Cochliomyia is a genus of blow flies known for its role as a pest in livestock. These flies are particularly notorious for causing myiasis, a condition where their larvae infest the tissues of living animals, leading to significant health issues. The most well-known species within this genus is Cochliomyia hominivorax, commonly referred to as the primary screwworm. This species primarily affects mammals, including cattle and humans, and can cause severe economic losses in agriculture due to its impact on animal health and productivity.