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Evaluation of the potency, optimal antigen level and lasting immunity of inactivated avian influenza vaccine prepared from H5N1 virus.
Jpn J Vet Res. 2009 Feb; 56(4):189-98.JJ

Abstract

Test vaccines comprised of inactivated water-in-oil emulsions containing various antigen levels were prepared using a non-pathogenic H5N1 avian influenza (AI) virus, Alduck/Hokkaidol Vac-1/04 (H5N1). The potencies of these test vaccines were evaluated by two experiments. In the first experiment, the triangular relationship among the antigen levels of test vaccines, the hemagglutination inhibition (HI) antibody response, and the protective effect against challenge with a highly pathogenic avian influenza (HPAI) virus, A/chicken/Yamaguchi/7/04 (H5N1), was confirmed. Then lasting immunity of chickens after a single-shot vaccination was confirmed in the second experiment. As a result, complete protection after the challenge was observed in chickens immunized by test vaccines with an antigen level of 160 HA units/dose or higher. Thus, it was ascertained that the minimum antigen level in the AI vaccine was 160 HA units/dose, and the minimum HI antibody titer that could protect chickens from HPAI virus infection-related death was considered to be 1:16. Dose-dependent HI antibody responses were observed in chickens after the vaccination. Thus, 640 HA units/dose was thought to be similar to the optimal antigen level. Alternatively, the HI antibody titers of chickens, injected with the vaccine containing 640 HA units/dose, were maintained at 1:181 or higher for 100 weeks after the single-shot vaccination.

Authors+Show Affiliations

Avian Biologics Department, Kyoto Biken Laboratories, Inc., Uji 611-0041, Japan. keibyou_one@kyotobiken.co.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19358446

Citation

Sasaki, Takashi, et al. "Evaluation of the Potency, Optimal Antigen Level and Lasting Immunity of Inactivated Avian Influenza Vaccine Prepared From H5N1 Virus." The Japanese Journal of Veterinary Research, vol. 56, no. 4, 2009, pp. 189-98.
Sasaki T, Isoda N, Soda K, et al. Evaluation of the potency, optimal antigen level and lasting immunity of inactivated avian influenza vaccine prepared from H5N1 virus. Jpn J Vet Res. 2009;56(4):189-98.
Sasaki, T., Isoda, N., Soda, K., Sakamoto, R., Saijo, K., Hagiwara, J., Kokumai, N., Ohgitani, T., Imamura, T., Sawata, A., Lin, Z., Sakoda, Y., & Kida, H. (2009). Evaluation of the potency, optimal antigen level and lasting immunity of inactivated avian influenza vaccine prepared from H5N1 virus. The Japanese Journal of Veterinary Research, 56(4), 189-98.
Sasaki T, et al. Evaluation of the Potency, Optimal Antigen Level and Lasting Immunity of Inactivated Avian Influenza Vaccine Prepared From H5N1 Virus. Jpn J Vet Res. 2009;56(4):189-98. PubMed PMID: 19358446.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of the potency, optimal antigen level and lasting immunity of inactivated avian influenza vaccine prepared from H5N1 virus. AU - Sasaki,Takashi, AU - Isoda,Norikazu, AU - Soda,Kosuke, AU - Sakamoto,Ryuichi, AU - Saijo,Kazue, AU - Hagiwara,Junko, AU - Kokumai,Norihide, AU - Ohgitani,Toshiaki, AU - Imamura,Takashi, AU - Sawata,Akira, AU - Lin,Zhifeng, AU - Sakoda,Yoshihiro, AU - Kida,Hiroshi, PY - 2009/4/11/entrez PY - 2009/4/11/pubmed PY - 2009/4/28/medline SP - 189 EP - 98 JF - The Japanese journal of veterinary research JO - Jpn J Vet Res VL - 56 IS - 4 N2 - Test vaccines comprised of inactivated water-in-oil emulsions containing various antigen levels were prepared using a non-pathogenic H5N1 avian influenza (AI) virus, Alduck/Hokkaidol Vac-1/04 (H5N1). The potencies of these test vaccines were evaluated by two experiments. In the first experiment, the triangular relationship among the antigen levels of test vaccines, the hemagglutination inhibition (HI) antibody response, and the protective effect against challenge with a highly pathogenic avian influenza (HPAI) virus, A/chicken/Yamaguchi/7/04 (H5N1), was confirmed. Then lasting immunity of chickens after a single-shot vaccination was confirmed in the second experiment. As a result, complete protection after the challenge was observed in chickens immunized by test vaccines with an antigen level of 160 HA units/dose or higher. Thus, it was ascertained that the minimum antigen level in the AI vaccine was 160 HA units/dose, and the minimum HI antibody titer that could protect chickens from HPAI virus infection-related death was considered to be 1:16. Dose-dependent HI antibody responses were observed in chickens after the vaccination. Thus, 640 HA units/dose was thought to be similar to the optimal antigen level. Alternatively, the HI antibody titers of chickens, injected with the vaccine containing 640 HA units/dose, were maintained at 1:181 or higher for 100 weeks after the single-shot vaccination. SN - 0047-1917 UR - https://www.unboundmedicine.com/medline/citation/19358446/Evaluation_of_the_potency_optimal_antigen_level_and_lasting_immunity_of_inactivated_avian_influenza_vaccine_prepared_from_H5N1_virus_ L2 - http://www.medicalonline.jp/meteo_linkout.php?issn=0047-1917&volume=56&issue=4&spage=189 DB - PRIME DP - Unbound Medicine ER -