转基因活体疫苗提供保护性免疫力,对野生类型的Anaplasma边缘传播挑战
Jonathan Ferm1, Deborah C Jaworski2, Ian Stoll3
1Center of Excellence for Vector-Borne Diseases, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, United States; Department of Veterinary Pathobiology, College of Veterinary Medicine, Bond Life Sciences Center, University of Missouri, Columbia, MO, United States.
Vaccine
|June 16, 2024
概括
一种改性活体疫苗 (MLAV) 保护牛免受带病原体Anaplasma marginale的感染,这种病原体是带病原体,会引起牛细胞增生症. 这种MLAV可以防止由Dermacentor variabilis传播的毒性Anaplasma marginale引起的疾病进展.
科学领域:
- 兽医微生物学 兽医微生物学
- 免疫学 免疫学 免疫学
- 寄生虫学的寄生虫学
背景情况:
- 边缘性阿纳等离子体引起牛等离子体病,这是热带和亚热带地区的重大牛病.
- 现有的杀死疫苗提供有限的控制,需要新的方法.
- 之前开发的Anaplasma边缘改性活体疫苗 (MLAV) 显示出在血液传播挑战后预防疾病的前景.
研究的目的:
- 评估Anaplasma边缘MLAV对虫传播的毒性Anaplasma边缘病毒的疗效.
- 评估MLAV预防疾病进展的能力,并减少由Dermacentor variabilis自然传播后的细菌病.
主要方法:
- 易受感染的公牛被免疫使用Anaplasma边缘MLAV.
- 免疫和非免疫对照牛通过受感染的Dermacentor variabilis雄性被挑战病毒性Anaplasma marginal通过感染的Dermacentor variabilis雄性.
- 挑战后监测了临床症状,细胞密集量和细菌水平.
主要成果:
- 没有免疫接种的对照小牛表现出发烧,昏迷,细胞密集量减少,挑战后细菌血症增加.
- 与对照组相比,免疫MLAV的牛在临床上保持健康,并显著减少了细菌病.
- 在MLAV授予了对急性,虫传播的质炎的保护.
结论:
- 亚纳等离子体边缘MLAV提供强大的保护,防止病毒性,传播的亚纳等离子体边缘引起的疾病.
- 这种MLAV代表了一种有前途的策略,用于控制由Dermacentor variabilis传播的牛质异质症.
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