The accuracy of the Montenegro skin test for leishmaniasis in PCR-negative patients

CONCLUSIONS: One of the most important reasons for PCR negativity among patients with active ATL is the presence of a strong cellular immunological response, especially in chronic and mucocutaneous leishmaniasis. This reinforces the considerable utility of the tests that detect cellular responses against Leishmania antigens such as the MST in PCR-negative patients when the performance in screening situations is questionable.
Source: Revista da Sociedade Brasileira de Medicina Tropical - Category: Tropical Medicine Source Type: research