This report presents three cases where the rK39 strip test failed to diagnose two cases of post-kala-azar dermal leishmaniasis and one case of visceral leishmaniasis. However, a strong clinical suspicion prompted further evaluation by polymerase chain reaction (PCR), which established the etiology. The present case series highlights the usefulness of PCR in the diagnosis of leishmaniasis.
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Das et al. (2011) studied this question.
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