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Objective: To investigate the positivity of Wuchereria bancrofti (W. bancrofti) in immigrants\udwho entered the country through Rio Branco, reducing the risk of introduction of parasites into\udnew areas and endemic areas of the past.\udMethods: It was realized a descriptive study. The AD12-ICT card test was applied on all\udimmigrants living temporarily in the Chacara Alliance shelter, located in the metropolitan area\udof Rio Branco-AC, Brazil. For the positive patients, 10 mL of venous blood was collected\udbetween 11:00 pm and 1:00 am. About 4 mL of venous blood was collected to detect the\udpresence of microfilariae in circulation in the tube using ethylene diamine tetraacetic\udacid and 6 mL of venous blood was collected to obtain blood serum for the Og4C3-ELISA,\udantibody Bm-14 and DNA-W. bancrofti tests.\udResults: The present study evaluated 415 individuals in September 2014 by circulating filarial\udantigen for W. bancrofti using the AD12-ICT card test. A total of 15/415 (3.61%) positive\udcases were found, all from Haiti. Night blood collection and serum were performed on 1/14\udfor confirmation the infection of W. bancrofti, which presented 34 microfilariae/mL, antigen,\udantibodies and PCR positives.\udConclusions: This surveillance action reveals, in a pioneering and unequivocal manner, that\udBrazil is an influx of immigrants carrying lymphatic filariasis and there is an urgent need to\udstep up surveillance at the main entry point for immigrants. Active surveillance may prevent\udthe reintroduction of lymphatic filariasis in areas under control, or prevent its introduction into\udother states of Brazil

Lymphatic filariasis: Surveillance action among immigrants from endemic areas, Acre State, Brazilian Amazon