The invention relates to novel antibodies which specifically bind to a peptide comprising the sequence Ala-Ala-Ala-Pro-Ala-Lys-Ala-Ala-Ala-Ala-Pro-Ala-Lys-Thr-Ala-Ala-Ala-Pro-Val (SEQ ID No. 1), and which are not induced in a host following the infection of the host with T. cruzi.