Histopathogical effects on the male reproductive system of the oriental latrine fly, Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae) induced by Deltamethrin
Ritika Gupta, Mohammad Amir
Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae), a species belonging to the family Calliphoridae, commonly known as Oriental latrine fly is a synanthropic fly. Its importance in medical and forensic entomology is very eminent. In spite of having advantages in forensic entomology, its effect on humans and animals is very serious as it causes myiasis, and various other pathogenic diseases. In our study, the effect of deltamethrin at sub lethal doses (0.005%, 0.001%, 0.0005%) and at two different post treatment periods (24 hours and 48 hours) was studied on the testis of Chrysomya megacephala. Deltamethrin was found to be effectual in inducing abnormalities on the male reproductive system. Histological investigation of testis illustrated disruption and detachment of the epithelium from the testicular tissue, necrosis, pycnosis and reduction in number of spermatocytes, spermatogonia and spermatozoa. Vacuolization in all the zones and disappearance of sperm bundles is also seen. All these effects were directly correlated with that of the dose of insecticide as well as the post treatment period and with the increase in concentration and the timing, the effects became more prominent.