Current Identification Challenges

Screwworm surveillance relies on laboratory-based morphological identification of larvae from suspected cases. Because New World screwworm larvae are difficult to distinguish from secondary screwworm (Cochliomyia macellaria) and other myiasis-causing species—especially in early stages—samples must be analyzed by trained specialists.

The USDA advises against field identification, as accurate species determination is critical. Misidentification can trigger unnecessary emergency responses or delay action against true infestations.

Molecular Diagnostic Solution

SecureDX’s New World Screwworm PCR assay enables precise molecular identification using genetic markers specific to Cochliomyia hominivorax. It distinguishes New World screwworm from morphologically similar species commonly found in clinical samples.

Designed for standard PCR platforms already used in veterinary labs, the assay integrates into existing surveillance workflows without the need for additional equipment.