Xem 1-13 trên 13 kết quả Ectoparasit
  • (BQ) Part 1 book "Lecture notes dermatology" presentation of content: Structure and function of the skin, hair and nails, approach to the diagnosis of dermatological disease, emergency dermatology, bacterial and viral infections, fungal infections, ectoparasite infections, eczema,... and other contents.

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  • Nghiên cứu này nhằm cung cấp thông tin về thành phần loài và cường độ của ký sinh trùng trong cá tra (Pangasianodon hypophthalmus) nuôi cấy trên các hệ thống nuôi thâm canh trong tỉnh An Giang. Kết quả phân tích ký sinh trùng của 329 mẫu (246 từ ao, 53 từ lồng và 30 từ các hệ thống văn hóa bút) cho thấy 19 loài thuộc 4 phylums. Những loài này bao gồm 13 loài ectoparasites và 6 loài indoparasites.

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  • Ngoại ký sinh trùng (Ectoparasitism): Ngoại ký sinh trùng của chuột quan trọng phụ thuộc vào cuộc sống của chúng trên vật chủ. Phần đông bị hạn chế bởi các nhân tố như đồng màu, lẫn màu, sự có mặt của lông và đáp ứng miễn dịch mà hướng tới tạo sự nhạy cảm của ve.

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  • Tularemia is a zoonosis caused by Francisella tularensis. Humans of any age, sex, or race are universally susceptible to this systemic infection. Tularemia is primarily a disease of wild animals and persists in contaminated environments, ectoparasites, and animal carriers. Human infection is incidental and usually results from interaction with biting or blood-sucking insects, contact with wild or domestic animals, ingestion of contaminated water or food, or inhalation of infective aerosols.

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  • More than one hundred species of nematodes have been reported from upland and paddy rice in many countries (Tab. 1). Their frequency and importance are very variable and, in most cases the existence of a parasitic relationship with rice is probable but has not been demonstrated. Many species of root nematodes have been observed both in dry and irrigaftieldd s but very few species are found in both situations. Several surveys made by the authors in WAefrsitc a have shown that a relatively low number of species are adapted to permanently flooded conditions.

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  • Available as a dust and wettable powder, Tetrachlorvinphos is applied to about 18 percent of the birds treated for ectoparasites and 10 percent of premise area (20 million square feet) to control various pests. Treatments are generally applied as high-pressure sprays at a rate of 1 gallon of spray (0.04 pound of active ingredient) spray per 100 birds. Premise applications for a variety of pests are made at a rate of 0.05 to 0.8 pound of active ingredient per 1,000 square feet of surface area. Dust formulations are applied to birds (dust boxes) at a rate of 0.01 to 0.2...

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  • Control of ectoparasites on poultry creates additional exposure risks. High pressures sprays or dipping are often used in large commercial operations to treat birds for obligate ectoparasites such as the northern fowl mite. Aerosol and splash represent exposure risks for the applicator in both situations. Routes of entry may be oral, dermal or inhalation. Dipping represents the most significant risk to personnel since each bird must be handled to effectively treat the outbreak. A significant amount of splash occurs as birds are immersed and withdrawn from the dipping vat.

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  • These pest infestations are infrequent and typically limited to breeding flocks or layers. Broilers and market turkeys are seldom if ever affected. Management of ectoparasites largely consists of whole flock treatments whenever infestations are detected by scouting birds and/or inspection of the structure and equipment (nest boxes, curtains, slats, cages). Other effective management techniques are not available. It is estimated that slightly more than 4 percent of breeder birds and layers are treated for ectoparasites each year.

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  • This material is available as an emulsifiable concentrate. Treatments are most often used for fly control. Occasionally, dichlorvos is applied to control ectoparasites during cleanup routines following the sale of an infested breeder or layer flock. It is applied as either a space spray (0.001 pound of active ingredient per 1,000 cubic feet) or as a premise spray (0.01 pound of active ingredient per 1,000 square feet of surface area). Dichlorvos is occasionally used as a spot larvicide treatment for fly control at a rate of 0.002 to 0.

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  • Available as an emulsifiable concentrate, RaVap is applied to approximately 10 percent of the birds treated for ectoparasites and 7 percent of premise area (14 million square feet) for a variety of pests. Treatments are applied as high-pressure sprays at a rate of 0.04 pound tetrachlorvinphos + 0.01 pound dichlorvos per 100 birds. Premise applications are made at a rate of 0.04 + 0.01 pound to 0.08 + 0.02 pound of active ingredient per 1,000 square feet of surface area for a variety of pests in poultry houses.

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  • Available as a dust, wettable powder, and emulsifiable concentrate, permethrin is used on more than 10 percent of the birds (layers, breeders, pullets) treated for ectoparasites. Treatment is most often applied to birds at a rate of 1 gallon of spray (0.004 pound of active ingredient) spray per 100 birds. Premise application at the same concentration is made at a rate of 1 to 2 gallons spray per 1,000 square feet of surface area. Dust formulations (0.25 percent) are applied to birds (dust boxes) and premises (litter) at a rate of 1 pound (0.003 pound of active ingredient) per 100...

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  • Chapter 54 - Community ecology. This chapter distinguish between the following sets of terms: competition, predation, herbivory, symbiosis; fundamental and realized niche; cryptic and aposematic coloration; batesian mimicry and Müllerian mimicry; parasitism, mutualism, and commensalism; endoparasites and ectoparasites; species richness and relative abundance; food chain and food web; primary and secondary succession;....

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  • This chapter distinguish between the following sets of terms: competition, predation, herbivory, symbiosis; fundamental and realized niche; cryptic and aposematic coloration; batesian mimicry and Müllerian mimicry; parasitism, mutualism, and commensalism; endoparasites and ectoparasites; species richness and relative abundance; food chain and food web; primary and secondary succession;...

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