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For reliable epidemiological studies and effective control programs , accurate detection of Trypanosoma cruzi in vectors is essential . Comparison of the antigen presentation pathway observed in this study to that followed by other toxins used as vectors is discussed . The length of the inheritance vector is now 2n , and the number of possible vectors is . If one of the vectors happens to lie on the horizontal or vertical axis of the plane , this direction is relative to our coordinate system . The sum of these k-dimensional terms vectors is reflected by the term in Equation ( 6 ) , and the right multiplication by differentially weights the separate dimensions .