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Effects of human contraceptive on reproduction and offspring in Chrysomya megacephala

Asian Pacific Journal of Tropical Medicine 2011年第4期4卷 259-265页

作者： tarinee chaiwong Kabkaew L Sukontason Urai Chaisri Hiromu Kurahashi Michelle Sanford Kom Sukontason College of Medicine and Public Health Ubon Ratchathani University Department of Parasitology Faculty of MedicineChiang Mai University Department of Tropical Pathology Faculty of Tropical MedicineMahidol University Department of Medical Entomology National Institute of Infectious DiseasesJapan Department of Entomology Texas A&M University

Objective:To investigate the effect of human contraceptive(HC) as ability to suppress the reproductive success of blow fly,Chrysomya megacephala(Fabricius)(***) and offspring under controlled laboratory ***:Adult *** were fed with low(0.036 mg/mL) and high dose(0.072 mg/mL) HC(Microgest~?,Thailand),containing levonorgestrel and ethinyl estradiol,in their drinking water for 7 *** experiments were set;experimentⅠwith fed only in parental males,experimentⅡwith fed only in parental females and experimentⅢwith fed in both males and *** experiments were then maintained for 3 generations after crossing and ***:A lower ovariole production and less fully mature ovarioles were evident in F1,F2 and F3 than control when parent males,females and both had been fed with high dose *** changes during spermatogenesis in F1,F2 and F3 testes was confirmed using transmission electron microscopy(TEM),showing the low level of condensed chromatin,necrotic chromatin,irregularities and degenerated nuclear envelope in the nucleus. In the cytoplasm,mitochondrial swelling,rough endoplasmic reticulum swelling as well as vacuolated cytoplasm were *** for the sperm per se,we found the degenerated nuclei and/ or incomplete mitochondrial derivative,axoneme and vacuolated *** deformity in F1,F2 and F3 ovariole,ultrastructural alteration observed by scanning electron microscopy (SEM) included malformations involving fragile enveloping peritoneal sheath,cracked ovarioles, peel away chorion,crumbled eggshell and incomplete development;whereas TEM presented malformed and disorganized mass of cells,proteic yolk granules and vacuolated vesicles. Conclusions:Administer of HC to adult *** caused ovariole reduction,less matured ovariole and affected cellular changes in testes and ovariole of offspring up to F3.

关键词： Human contraceptive Reproduction Chrysomya megacephala

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