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  • Title: The experimental infection of pigs with different numbers of Taenia solium eggs: immune response and efficiency of establishment.
    Author: Santamaría E, Plancarte A, de Aluja AS.
    Journal: J Parasitol; 2002 Feb; 88(1):69-73. PubMed ID: 12053982.
    Abstract:
    Three of 4 pigs inoculated with 10 eggs of Taenia solium became infected. In those pigs infected with larger numbers of eggs, all became infected. Specific antibodies against the metacestodes were found in serum at day 30 postinoculation (PI) in animals that received 1,000 or more eggs and at day 60 in those that received 10 or 100 eggs. The concentration and diversity of antibodies increased up to the day of death in pigs that received 10,000 or 100,000 eggs. All pigs infected with 1,000 or more eggs developed antibodies, but only 40% and 75% of pigs that received 10 and 100 eggs, respectively, developed antibodies. Metacestodes were found in the muscles of 23 of the 27 infected animals. In 35.7% of the pigs that received 1,000 or more eggs, metacestodes were also found in the brain. Most of the metacestodes found in pigs infected with 10 or 100 eggs were caseous, whereas in pigs infected with 1,000 or more eggs the majority of metacestodes were vesicular. This study shows that the severity of T. solium infection and the possible regulation of the immune system-evasion mechanisms depend on the number of metacestodes that succeed in establishing themselves and remain vesicular.
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