Gene-modified genotype II live attenuated African swine fever virus induces cross-protection against genotype I but not against genotype IX.

• Tác giả: Linda K Dixon, Johanneke D Hemmink, Vlad Petrovan, Anusyah Rathakrishnan, Ana Luisa Reis
• Ngôn ngữ: eng
• Ký hiệu phân loại: 944.041 Period of Estates-General, National Assembly, Legislative
• Thông tin xuất bản: United States : Emerging microbes & infections , 2025
• Bộ sưu tập: NCBI
• ID: 745657
• Chủ đề: 1. Gene; 2. Modified; 3. Genotype

Tóm tắt

African swine fever virus originated in a wildlife cycle in East Africa and spread to domestic pigs. At least twenty-three genotypes are present in Africa whereas only genotypes I and II have spread to other continents. Vaccine development has been directed mainly to genotype II. The ability of genotype II vaccines to induce cross-protection against other genotypes is unknown. Here, we compared cross-protection induced in pigs by an attenuated multiple gene-deleted genotype II modified live vaccine candidate against challenge with different genotypes. Protection against homologous virulent genotype II virus was 100%. Cross-protection against virulent genotype I virus varied between 57 and 71%. However, no protection was achieved against genotype IX challenge. The results indicate potential for use of vaccines in regions where genotypes I and II are circulating.