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ORIGINAL RESEARCH article

Front. Vet. Sci.
Sec. Veterinary Pharmacology and Toxicology
Volume 11 - 2024 | doi: 10.3389/fvets.2024.1436426

Protection Efficacy and the Safety of the Synergy between Modified Bazhen Powder and PRRSV Modified-live Virus Vaccine against HP-PRRSV in Piglets

Provisionally accepted
Hua Chai Hua Chai Yanru Wei Yanru Wei Wenguang Chen Wenguang Chen Guorui Han Guorui Han God'Spower Bello-Onaghise God'Spower Bello-Onaghise Yanyan Liu Yanyan Liu Chunliu Dong Chunliu Dong Zhiyun Zhang Zhiyun Zhang Yanhua Li Yanhua Li *
  • Northeast Agricultural University, Harbin, China

The final, formatted version of the article will be published soon.

    The highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) poses a significant threat to the global swine industry. Vaccination is a preventive measure against viral infections. However, the use of vaccines in livestock healthcare programs faces the challenge of safety and delayed immune responses. Earlier studies have shown the potential of modified Bazhen powder as an immunomodulator with significant biological properties, but its effect on vaccines against HP-PRRSV is yet to be studied. This study elucidated how modified Bazhen powder could improve the safety and efficacy of the conventional PRRSV vaccine by evaluating T-cell responses, antibody levels, clinical symptoms, levels of viremia, organ health, and cytokine production. The results revealed that the oral application of modified Bazhen powder in combination with PRRS vaccination improved both cellular and humoral immunity, accelerated viremia clearance, improved lung injury scores, and reduced viral load in the tonsils. The modified Bazhen powder also effectively reduced inflammatory responses following a PRRSV challenge. These findings further highlight the pharmacological properties of modified Bazhen powder as a potential oral immunomodulatory agent that could enhance vaccine efficacy and ensure broad-spectrum protection against HP-PRRSV in pigs.

    Keywords: HP-PRRSV HuN41, modified live vaccine 2, modified Bazhen powder 3, efficacy 4, safety 5, synergy 6

    Received: 22 May 2024; Accepted: 16 Jul 2024.

    Copyright: © 2024 Chai, Wei, Chen, Han, Bello-Onaghise, Liu, Dong, Zhang and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Yanhua Li, Northeast Agricultural University, Harbin, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.