title: An improved embryonated chicken egg model for the evaluation of antiviral drugs against influenza A virus.
abstract: Influenza is a serious global public health problem and an economic burden. With the continual emergence of new influenza A virus strains, new antiviral drugs are needed urgently. In this study, an improved embryonated chicken egg model for evaluating antiviral activity against Influenza A virus was developed. In the model, the influenza A virus was injected into the allantoic cavity and ribavirin was injected into the albumen of the egg. The levels of influenza A virus in the allantoic fluid was titrated by the hemagglutination test after incubation for 72 h at 35.5 degrees C and 12 h at 4 degrees C. Ribavirin treatment at a dose of 25 mg/kg to 100 mg/kg decreased significantly the hemagglutination titers both of Influenza virus A/FM1, H1N1 (IVA1) (p < 0.01) and influenza virus A/Wuhan/359/95, H3N2 (IVA3) (p < 0.01). In a time-dependent drug addition assay, significant efficacy of ribavirin against both IVA1 and IVA3 was observed when the drug was administered before and shortly after viral inoculation (p < 0.01 or p < 0.05). In conclusion, ribavirin treatment showed significant antiviral activity against IVA1 and IVA3 in this model, suggesting that the improved model would be useful for evaluating the anti-influenza virus activity of potential inhibitors.
authors.affiliation: Department of Epidemiology, Public Health College, Harbin Medical University, Harbin, China.
authors.forename: Ji-Xi
authors.initials: JX
authors.lastname: Wang
authors.forename: Jing-Yu
authors.initials: JY
authors.lastname: Zhou
authors.forename: Qing-Wei
authors.initials: QW
authors.lastname: Yang
authors.forename: Yang
authors.initials: Y
authors.lastname: Chen
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Ying-Ai
authors.initials: YA
authors.lastname: Piao
authors.forename: Hong-Yuan
authors.initials: HY
authors.lastname: Li
mesh_terms: D000482:Allantois / Q000821:virology*; D000818:Animals; D000998:Antiviral Agents / Q000008:administration & dosage / Q000494:pharmacology*; D002460:Cell Line; D002642:Chick Embryo; D006386:Hemagglutination Tests; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000187:drug effects*; D053122:Influenza A Virus, H3N2 Subtype / Q000187:drug effects*; D008826:Microbial Sensitivity Tests / Q000379:methods*; D023421:Models, Animal; D012254:Ribavirin / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D000998:Antiviral Agents; D012254:Ribavirin