Volume 71, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Rapid diagnosis leading to effective treatment is essential to control escalating infectious diseases such as malaria. Malaria pigment (hemozoin) detection by laser desorption mass spectometry (LDMS) was recently shown to be a sensitive (<10 parasites/μL) technique for detecting parasites cultured in human blood. To examine the use of LDMS in a rapid new malaria screening assay, we followed the time course of infections in mice in parallel with light microscopy and a colorimetric hemozoin assay. Hemozoin was detected by LDMS in 0.3 μL of blood within two days of infection independently of the inoculating dose of 10, 10, or 10 parasite-infected erythrocytes. Microscopy and colorimetric hemozoin determinations lagged the LDMS detection of infections by 2–4 and 3–5 days, respectively, except at the highest inoculation dose. The LDMS detection of hemozoin is a potentially more rapid screen than light microscopy for detecting malaria infection in this mouse model at parasitemias <0.1%.


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  • Received : 23 Feb 2004
  • Accepted : 18 Apr 2004

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