Cheese fly
Piophila casei
Piophila casei is a fly from the family of cheese flies ( Piophilidae ), which is distributed worldwide. Like the other species of this family are the larvae of these species partially resistant to gastric acid, can reach about food in the human digestive tract and cause myiasis there. Nevertheless, Casu Marzu, a sheep's milk cheese from Sardinia, thereby refined that the larvae develop in him.
Features
The animals will be three to four millimeters long. Head, mesonotum, scutellum ( scutellum ) and abdomen are black, the face, the forehead in the front third and the legs are yellow. However, the rails ( tibia ) and legs ( femora ) of the front and rear pair of legs are mostly black. The mesonotum bears three widely spaced rows of small bristles and being oily.
The larvae have a white to yellowish white, 9-10 mm long and about an inch thick, cylindrical, tapered to the front and to the rear body. The thickest area is located between the seventh and eighth body segment. The chitinisierten mouthparts are black.
Way of life
The females lay their cylindrical- oval eggs on preserved fish, ham and cheese, from which the larvae feed. After one to two days, the larvae hatch. To pupation they need about two weeks, the pupal period is about 12 days. Pupation takes place away from the food. The adults live about 4 to 10 days, on the third or fourth day is the pairing instead. The larvae can jump by rapid inward bending and re -expansion of the body 10 to 15 centimeters wide and high.