Vaccination trial against experimental trichinellosis using autoclaved trichinella spiralis larvae vaccine [ATSLV]

ABSTRACT

The autoclaved Trichinella spiralis larvae vaccine [ATSLV] was tested and showed unpredictable effect on the immune system of mice experimentally infected with T. spiralis. The vaccine was given with Bacillus Calmette-Guerin [BCG] as an adjuvant at different durations and by different routes of administration. The best result was achieved by given the vaccine twice intradermally with two-week interval as evidenced by a significant reduction in adult and larval count, as well as reproductive capacity index. Histopathologically, there was a significant reduction in the number of the encysted larvae, which showed degeneration and hyalinization of the cyst wall accompanied by early pericystic fibrosis