Method for detection of pathogenic microorganisms

• US 7,113,275 B2
• Filed: 03/14/2005
• Issued: 09/26/2006
• Est. Priority Date: 01/10/2002
• Status: Active Grant

• Current Assignee: Chemimage Corporation
• Original Assignee: Chemimage Corporation
• Inventors: Vanni, G. Steven, Nelson, Matthew P., Treado, Patrick J., Schweitzer, Robert C., Gardner, Charles W. Jr., Maier, John S., Wolfe, Juliane
• Primary Examiner(s): EVANS, FANNIE L
• Application Number:
  US11/079,493
• Publication Number:
  US 20060028644A1
• Time in Patent Office: 561 Days
• Field of Search: 356/301
• US Class Current: 356/301
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/2823 Imaging spectrometer
• CPC Class Codes: G01J 3/44 Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
• CPC Class Codes: G01N 2021/1736 with two or more light sources
• CPC Class Codes: G01N 2021/6421 Measuring at two or more wavelengths
• CPC Class Codes: G01N 2021/6423 Spectral mapping, video display
• CPC Class Codes: G01N 2021/656 Raman microprobe
• CPC Class Codes: G01N 21/31 Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry G01N21/72 takes precedence
• CPC Class Codes: G01N 21/33 using ultraviolet light G01N21/39 takes precedence
• CPC Class Codes: G01N 21/359 using near infrared light
• CPC Class Codes: G01N 21/645 Specially adapted constructive features of fluorimeters
• CPC Class Codes: G01N 21/6456 Spatial resolved fluorescence measurements; Imaging
• CPC Class Codes: G01N 21/6458 Fluorescence microscopy fluorescence microscopes per se G02B21/0076 and G02B21/16
• CPC Class Codes: G01N 21/6486 Measuring fluorescence of biological material, e.g. DNA, RNA, cells G01N21/6428 takes precedence
• CPC Class Codes: G01N 21/65 Raman scattering

Abstract

Pathogenic microorganisms are detected and classified by spectral imaging of the Raman light scattered by the organisms.

Claims

1. A method for detection of at least one Anthrax microorganism (Bacillus anthracis) comprising:

a) irradiating a sample area containing said at least one Anthrax microorganism, and simultaneously collecting spatially resolved Raman light from a plurality of pixels; and

b) analyzing said pixels for patterns characteristic of an Anthrax microorganism.

2. The method of claim 1 where the step of analyzing includes analyzing the strain of the Anthrax microorganism.

3. The method of claim 1 where the step of analyzing includes analyzing the viability of the Anthrax microorganism.

4. The method of claim 1 where the step of analyzing includes analyzing the growth medium in which the Anthrax microorganism has been grown.

5. A method for detection of at least one pathogenic microorganism comprising:

a) irradiating a sample area containing said at least one pathogenic microorganism, and simultaneously collecting spatially resolved Raman light from said sample area, wherein said Raman light forms a plurality of pixels; and

b) analyzing at least one of said pixels for patterns characteristic of a pathogenic microorganism.

6. The method of claim 5 wherein said Raman light from said sample area passes through an acousto-optic tunable filter.

7. The method of claim 5 wherein said Raman light from said sample area passes through an optical array to simultaneously detect a plurality of said plurality of pixels.

8. The method of claim 5 wherein said Raman light from said sample area passes through a FAST fiber array spectral translator.

9. The method of claim 5 wherein said Raman light from said sample area passes through a filter selected from the group consisting of a Fabry Perot angle tuned filter, an acousto-optic tunable filter, a liquid crystal tunable filter, a Lyot filter, an Evan'"'"'s split element liquid crystal tunable filter, Solc liquid crystal tunable filter, and a liquid crystal Fabry Perot (LCFP) tunable filter.

10. The method of claim 5 wherein said Raman light from said sample area passes through an interferometer selected from the group consisting of a polarization-independent imaging interferometer, a Michelson interferometer, a Sagnac interferometer a Twynam-Green Interferometer, a Mach-Zehnder Interferometer, a tunable Fabry Perot Interferometer.

11. The method of claim 5 wherein said Raman light from said sample area passes through at least two filters chosen from the group consisting of Soic, LCFP, Lyot, and Evan'"'"'s split element filters.

12. The method of claim 5 wherein said at least one pathogenic microorganism is an anthrax spore.

13. The method of claim 5 further comprising forming an image of an object selected from the group of pathogenic microorganisms consisting of protozoa, cryptosporidia microorganisms, Escherichia coli, Escherichia coli 157 microorganisms, Plague (Yersinia pestis), Smallpox (variola major), Tularemia (Francisella tularensis), Brucellosis (Brucella species), Clostridium perfringens, Salmonella, Shigella, Glanders (Burkholderia mallei), Melioidosis (Burkholderia pseudomallei), Psittacosis (Chlamydia psittaci), Q fever (Coxielia burnetii), Typhus fever (Rickettsia prowazekii), and Vibrio cholerae.

14. The method of claim 5 further comprising forming an image of a pathogenic microorganism selected from the group of consisting of Giardia, Candida albicans, Enterococcus faecalis, Staphylococcus epidermidis, Staphylococcus aureus, Enterobacter aerogenes, Corynebacterium diphtheriae, Pseudomonas eruginosa, Acinetobacter calcoaceticus, Klebsiella pneumoniae, and Serratia marcescens.

15. The method of claim 5 wherein said illuminating light is in the ultraviolet spectral region with a wavelength less than 410 nm.

16. The method of claim 5 wherein said illuminating light is in the visible spectral region with a wavelength less than 780 nm and greater than 410 nm.

17. The method of claim 5 wherein said illuminating light is in the near infrared spectral region with a wavelength less than 2500 nm and greater than 780 nm.

18. The method of claim 5 wherein said step of analyzing includes analyzing the strain of a pathogenic microorganism.

19. The method of claim 5 wherein said step of analyzing includes analyzing the viability of a pathogenic microorganism.

20. The method of claim 5 wherein said step of analyzing includes analyzing the growth medium in which a pathogenic microorganism has been grown.

21. A method for detection of at least one pathogenic microorganism comprising:

a) illuminating a sample area containing said at least one pathogenic microorganism with light, and simultaneously collecting spatially resolved Raman light from a plurality of spatially distinct locations of said sample area; and

b) analyzing said collected spatially resolved Raman light for patterns characteristic of a pathogenic microorganism.

22. The method of claim 21 wherein said Raman light from said sample area passes through an acousto-optic tunable filter.

23. The method of claim 21 wherein said Raman light from said sample area passes through an optical array to simultaneously detect a plurality of said plurality of spatial locations.

24. The method of claim 21 where the step of analyzing includes analyzing the strain of the pathogenic microorganism.

25. The method of claim 21 where the step of analyzing includes analyzing the viability of the pathogenic microorganism.

26. The method of claim 21 where the step of analyzing includes analyzing the growth medium in which the pathogenic microorganism has been grown.

27. The method of claim 21 wherein said Raman light from said sample area passes through a FAST fiber array spectral translator.

28. The method of claim 21 wherein said Raman light from said sample area passes through a filter selected from the group consisting of a Fabry Perot angle tuned filter, an acousto-optic tunable filter, a liquid crystal tunable filter, a Lyot filter, an Evan'"'"'s split element liquid crystal tunable filter, Solc liquid crystal tunable filter, and a liquid crystal Fabry Perot (LCFP) tunable filter.

29. The method of claim 21 wherein said Raman light from said sample area passes through an interferometer selected from the group consisting of a polarization-independent imaging interferometer, a Michelson interferometer, a Sagnac interferometer a Twynam-Green Interferometer, a Mach-Zehnder lnterferometer, and a tunable Fabry Perot Interferometer.

30. The method of claim 21 wherein said Raman light from said sample area passes through at least two filters chosen from the group consisting of Solc, LCFP, Lyot, and Evan'"'"'s split element filters.

31. The method of claim 21 wherein said at least one pathogenic microorganism is an anthrax spore.

32. The method of claim 21 further comprising forming an image of a pathogenic microorganism selected from the group of microorganisms consisting of protozoa, cryptosporidia microorganisms, Escherichia coli, Escherichia coli 157 microorganisms, Plague (Yersinia pestis), Smallpox (variola major), Tularemia (Francisella tularensis), Brucellosis (Brucella species), Clostridium perfringens, Salmonella, Shigella, Glanders (Burkholderia mallei), Melioidosis (Burkholderia pseudomallei), Psittacosis (Chlamydia psittaci), Q fever (Coxiella burnetii), Typhus fever (Rickettsia prowazekii), and Vibrio cholerae.

33. The method of claim 21 further comprising forming an image of a pathogenic microorganism selected from the group of microorganisms consisting of Giardia, Candida albicans, Enterococcus faecalis, Staphylococcus epidermidis, Staphylococcus aureus, Enterobacter aerogenes, Corynebacterium diphtheriae, Pseudomonas eruginosa, Acinetobacter calcoaceticus, Klebsiella pneumoniae, and Serratia marcescens.

34. The method of claim 21 wherein said illuminating light is in the ultraviolet spectral region with a wavelength less than 410 nm.

35. The method of claim 21 wherein said illuminating light is in the visible spectral region with a wavelength less than 780 nm and greater than 410 nm.

36. The method of claim 21 wherein said illuminating light is in the near infrared spectral region with a wavelength less than 2500 nm and greater than 780 nm.

37. The method of claim 21 wherein said step of analyzing includes analyzing the strain of a pathogenic microorganism.

38. The method of claim 21 wherein said step of analyzing includes analyzing the viability of a pathogenic microorganism.

39. The method of claim 21 wherein said step of analyzing includes analyzing the growth medium in which a pathogenic microorganism has been grown.

40. A method for detection of at least one microorganism comprising:

a) irradiating a sample area containing said at least one microorganism and simultaneously collecting spatially resolved Raman light from a plurality of pixels wherein said Raman light passes through a photonic array; and

b) analyzing said plurality of pixels for patterns characteristic of a microorganism.

41. A method for detection of a toxic substance comprising:

a) illuminating a sample area containing said toxic substance with light, and simultaneously collecting spatially resolved Raman light from a plurality of spatially distinct locations within said sample area; and

b) analyzing said collected spatially resolved Raman light for patterns characteristic of said toxic substance.

42. The method of claim 41 wherein said illuminating light is in the ultraviolet spectral region with a wavelength less than 410 nm.

43. The method of claim 41 wherein said illuminating light is in the visible spectral region with a wavelength less than 780 nm and greater than 410 nm.

44. The method of claim 41 wherein said illuminating light is in the near infrared spectral region with a wavelength less than 2500 nm and greater than 780 nm.