Method and system for rapid malaria detection
First Claim
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1. A method of detecting malaria with an ATR-FTIR spectrometer comprising:
- (i) delivering an evanescent IR beam using an ATR substrate of an ATR-FTIR spectrometer in contact with a patient sample, wherein the patient sample comprises red blood cells at least partially concentrated and separated from a patient blood sample and dried onto the ATR substrate;
(ii) detecting IR radiation transmitted from the ATR substrate to produce a spectrum of the patient sample;
(iii) processing one or more signals in the spectrum to identify any malaria parasite; and
(iv) determining a parasitemia level of the patient sample using one or more signals in the spectrum.
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Abstract
The invention described herein relates to a method of detecting malaria comprising the steps of: (i) delivering an evanescent IR beam through said ATR substrate in contact with a patient blood sample; (ii) detecting IR radiation transmitted from the ATR substrate to produce a signal characteristic for one or more lipids in the sample, and (iii) processing said signal and a set of reference library spectra of lipids associated with malaria parasites in order to detect matches and quantify said one or more lipids in the sample. In contrast to the prior art, the present invention relies on detecting lipids instead of hemozoin.
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20 Claims
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1. A method of detecting malaria with an ATR-FTIR spectrometer comprising:
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(i) delivering an evanescent IR beam using an ATR substrate of an ATR-FTIR spectrometer in contact with a patient sample, wherein the patient sample comprises red blood cells at least partially concentrated and separated from a patient blood sample and dried onto the ATR substrate; (ii) detecting IR radiation transmitted from the ATR substrate to produce a spectrum of the patient sample; (iii) processing one or more signals in the spectrum to identify any malaria parasite; and (iv) determining a parasitemia level of the patient sample using one or more signals in the spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17)
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16. A system of analysis for diagnosing malaria, the system comprising:
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an ATR substrate for receiving a blood sample; an FTIR spectrometer configured to generate an evanescent wave that extends into the sample using the ATR substrate; a detector for detecting IR radiation transmitted from the ATR substrate to produce a signal; and a processor configured to process the signal to create an FTIR spectrum of the blood sample and determine a parasitemia level using different wavenumber values for different parasitemia levels.
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18. A method, comprising:
with a processor, executing an instruction set stored in a non-transitory computer readable storage medium, the instruction set including instructions to compare one or more spectral signals characteristic of a patient blood sample infected with malaria parasites to detect matches and quantify a parasitemia level using different wavenumber values or absorbance values for different parasitemia levels, associated with at least one parasite chosen from the group comprising P. falciparum, P. vivax, P. ovale, P. malariae and P. knowlesi. - View Dependent Claims (19, 20)
Specification