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• W4223419110 abstract "Crotalid envenomation is a neglected collective health problem involving many countries in America, which need secure and inexpensive snake anti-venom treatments. Here, high antibody titers (IgY) were raised in the Ostrich (Struthio camelus) egg yolk by immunizing with the venom of Venezuelan venomous Crotalus snakes. Ostriches were immunized with a pool of venoms from common rattlesnake (Crotalus durissus cumanensis), Uracoan rattlesnake (Crotalus vegrandis), Guayana rattlesnake (Crotalus durissus ruruima) and black rattlesnake (Crotalus pifanorum). The anti-snake venom antibodies were prepared from egg yolk by the water dilution method, enriched by the addition of caprylic acid (CA) and precipitation with ammonium sulfate at 30% (W/V). The purity and molecular mass of the final product was satisfactory, yielding a single ∼ 175 kDa band in SDS-PAGE gels ran under non-reducing conditions. In the immunoblot analysis, specific binding of the antivenom was observed with most venom proteins. The LD50 was 16.5 g/mouse (825 µg/kg body weight). High titers of IgY against Crot/pool venom were shown by ELISA. The median effective dose (ED50) was 19.66 mg/2LD50. IgY antibodies neutralized efficiently the Crot/pool venom lethality. As far as we know, this is the first anti-snake venom produced in ostriches, which could make this technology an affordable alternative for low-income countries, since it is likely to produce about 2-4 g of IgY per ostrich egg. Hence, almost 400 g of IgY can be purified from only one ostrich during a year. In addition, there are enormous differences in the cost of investment in the maintenance of horses, from the points of view of infrastructure, feeding and veterinary care, in which the cost can reach USD 100 per animal per day, compared to a maintenance cost of USD 146 per month per producing bird. These results are encouraging and could easily be extrapolated to the manufacturing of other antivenoms and antitoxins as well, as they could be applied to the manufacturing of potential diagnostic tools." @default.
• W4223419110 created "2022-04-14" @default.
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• W4223419110 date "2022-03-23" @default.
• W4223419110 modified "2023-10-18" @default.
• W4223419110 title "A new approach of immunotherapy against Crotalus snakes envenoming: ostrich (Struthio camelus) egg yolk antibodies (IgY-technology)" @default.
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• W4223419110 doi "https://doi.org/10.54817/ic.v63n1a05" @default.
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