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Multiple insecticide resistance/susceptibility status of Culex quinquefasciatus,principal vector of bancroftian filariasis from filaria endemic areas of northern India

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Asian Pacific Journal of Tropical Medicine 2011年第6期4卷 426-429页

作者： Kaushal Kumar Abhay K Sharma Sarita Kumar Sunita Patel Manas Sarkar Chauhan LS Centre for Medical Entomology and Vector Management National Centre for Diseases Control22-Shamnath MargDelhi-110054India Regional filariasis Training and Research Centre National Centre for Diseases ControlVaranasi-221010India

Objective:To understand the insecticide resistance status of Culex quinquefasciatus Say（Diptera: Culicidae）（Cx.Quinquefasciatus） to deltamethrin,cyfluthrin,permethrin,lambdacyhalothrin, DDT and malathion in filarial endemic areas of Uttar Pradesh,India.Methods:Insecticide susceptibility assays were performed on wild-caught adult female Cx.quinquefasciatus mosquitoes to deltamethrin（0.05%）,cyfluthrin（0.15%）,permethrin（0.75%）,lambdacyhalothrin （0.05%）,malathion（5.0%） and DDT（4.0%）,the discriminating doses recommended by the World Health Organisation（WHO）.Results:The data showed that Cx.quinquefasciatus is highly resistant to DDT and malathion;the mortality was 28.33%and 27.5%,respectively and incipient resistance to synthetic pyrethroids（deltamethrin,cyfluthrin,permethrin,and lambdacyhalothrin）, where mortality ranged from 95.83%in permethrin to 98.33%in cyfluthrin and lambdacyhalothrin. Knockdown times(KDT50) in response to synthetic pyrethroids varied significantly between different insecticides（Pfilaria endemic areas of northern India.

关键词： Insecticide resistance filaria DDT Synthetic pyrethroid Malathion Culex quinquefasciatus

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Study on small ruminant lungworms and associated risk factors in northeastern Iran

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Asian Pacific Journal of Tropical Medicine 2012年第11期5卷 853-856页

作者： Hassan Borji Mohammad Azizzadeh Mansour Ebrahimi Mohammad Asadpour Department of Pathobiology School of Veterinary MedicineFerdowsi University of MashhadMashhadIran Department of clinical science School of Veterinary MedicineFerdowsi University of MashhadMashhadIran

Objective:To determine the prevalence,identify the species involved and assess possible risk factors of lungwonn infection in small ruminant slaughtered in abattoir of Mashhad in the northeast of Iran from October 2010 -August 2011.Methods:Faecal and post mortem examination were conducted on 350 and 2 500 animals,respectively.Results:The overall prevalence of lungwonn infection was 10.85%and 3.80%in coproscopic and post mortem examination respectively,and this difference was found to be significant.Higher prevalence of lungwonn infection was recorded in post mortem examination in sheep(4.1%) than in goats (0.5%)(Pfilaria,Protostrongylus rufescens and mixed infection were 3.7%,0.1%and 0.2%in sheep while in goats,the infection was reported with Dictyocaulus filaria(0.5%) only.The seasonal dynamics of lungwonn infection showed that prevalence was highest in winter(7.8%) with a remarkable decline during the dry time(summer) (0.8%) which the difference was significant(P<0.001).The animals of less than one year old showed greater infection in post mortem examination than older animals significantly(P<0.001). Also,the infection rate between male and female animals showed significant difference(P<0.05) with prevalence rate of 4.6%and 2.0%,respectively.Conclusions:Due to its impact on production, emphasis should be given for the control and prevention of lungworm infection in this area.

关键词： Dictyocaulus filaria Protostrongylus rufescens Lungworms Small ruminant Iran

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