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[Santa Fe triatomine bug detector. A high sensitivity and low cost design].

In 1987, Wisnivesky et al. developed "Maria" sensor box (MSB) which was assayed by sanitary agents, during a surveillance phase. In 1987, this design, with the same strategy, was assayed in an area of Santa Fe Province where very good results were obtained. Due to the deterioration of the Primary Health Care system, Santa Fe's Control Programme has carried out a study with MSB used by the owners of the houses. Some difficulties related with the internal structure of MSB were detected. A new model named "Detector SANTA FE" (DSF) was designed in order to overcome these difficulties. The sensitivity and cost of both models were compared in this study. Evaluation of 63 households was carried out with 172 elements distributed in bedrooms, in Villa Minetti (9 de Julio Department). One MSB and one DSF were placed on the walls above the bed-heads, separated by 30 cm, 1.5 m from the floor. Results show that 22 houses were positive after the evaluations. Of those 22 positives, 7 were detected by both models simultaneously, 1 only by MSB and 14 by DSF alone. Sensitivity for MSB was 36% and for DSF was 95%. Regarding efficiency, MSB costs $3.00 per unit, while DSF costs $1.00 per unit. The conclusion of the study is that DSF is remarkably more sensitive and cheaper than MSB.