Human African trypanosomiasis (HAT), commonly known as sleeping sickness is one of the neglected tropical diseases (NTDs), which is fatal if left untreated. Its diagnosis is a challenge since the signs and symptoms of the primary phase are not specific, the existing diagnostic methods have low sensitivity and specificity, and the available drugs have some toxicity. New, robust, and cost-effective techniques are needed for the early identification of parasites. This study aimed to assess the sensitivity and specificity of two different types of polyclonal antibodies against T. b. gambiense using antigen detection ELISA. Polyclonal antibodies against the expressed proteins Tbg I2 and Tbg I17 were produced using New Zealand white rabbits. The antibody titer measured was greater than 32 g/L after the 3 rd immunization for the expressed protein Tbg I2.
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