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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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Chrysomya chani Kurahashi (Diptera: Calliphoridae), a blow fly species of forensic importance: morphological characters of the third larval instar and a case report from Thailand

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Forensic Sciences Research 2018年第1期3卷 83-93页

作者： kabkaew l.sukontason Tanin Bhoopat Anchalee Wannasan Narin Sontigun Sangob Sanit Jens Amendt Chutharat Samerjai Kom sukontason Department of Parasitology Faculty of MedicineChiang Mai UniversityChiang MaiThailand Department of Forensic Medicine Faculty of MedicineChiang Mai UniversityChiang MaiThailand Institute of legal Medicine Forensic Biology/EntomologyGoethe-University FrankfurtFrankfurt am MainGermany

Blow flies are worldwide the most important insects from a forensic point of *** Thailand,aside from the two most common species,Chrysomya megacephala (F.) and Chrysomya rufifacies (Macquart),Chrysomya chani Kurahashi was also found to be of forensic *** present a case of a human female cadaver in its bloated stage of decomposition,discovered at Pachangnoi Subdistrict,northern *** sampling during the autopsy displayed an assemblage of numerous dipteran *** observations showed the coexistence of third instar larvae of the three blow flies ***,Chrysomya villeneuvi Patton,an unknown blow fly species and one muscid,Hydrotaea *** minimum post-mortem interval was estimated to be six days,based on the developmental rate of C *** ID of the unknown larva,which is the focus of this report,was revealed later as *** by DNA sequencing,using a 1205 bp of cytochrome c oxidase subunit Ⅰ (COⅠ).The occurrence of *** on a human body revealed the need to analyse and describe the morphology of its immature stage,to enable forensic entomologists to identify this fly species in future *** morphological examination of the third instar was performed,revealing peculiar characteristics: protuberant tubercles encircling abdominal segments;9-11 lobes on the anterior spiracle;six prominent pairs of tubercles along the peripheral rim of the eighth abdominal segment;a heavily sclerotized complete peritreme of the posterior spiracles.A key to differentiate the third instar of blow flies of forensic importance in Thailand is provided.

关键词： Forensic science forensic entomology Chrysomya chani larval morphology identification Thailand

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