Methods, devices, kits and compositions for detecting roundworm, whipworm, and hookworm

• US 7,951,547 B2
• Filed: 05/18/2009
• Issued: 05/31/2011
• Est. Priority Date: 06/15/2007
• Status: Active Grant

• Current Assignee: Monsanto Company (Bayer AG), IDEXX Laboratories Incorporated
• Original Assignee: Divergence, Inc. (Bayer AG), IDEXX Laboratories Incorporated
• Inventors: Flynn, Laurie A., Crawford, Michael, Geng, Jinming, Elsemore, David Allen
• Primary Examiner(s): NAVARRO, ALBERT MARK
• Application Number:
  US12/467,826
• Publication Number:
  US 20090286231A1
• Time in Patent Office: 743 Days
• Field of Search: None
• US Class Current: 435/7.1
• CPC Class Codes: G01N 2333/43526 from worms
• CPC Class Codes: G01N 2333/4353 from nematodes
• CPC Class Codes: G01N 2469/10 Detection of antigens from microorganism in sample from host
• CPC Class Codes: G01N 33/5308 for analytes not provided for elsewhere, e.g. nucleic acids, uric acid, worms, mites
• CPC Class Codes: G01N 33/56966 Animal cells
• CPC Class Codes: G01N 33/6893 related to diseases not provided for elsewhere

Abstract

Methods, devices, kits and compositions for detecting the presence or absence of one or more helminthic coproantigens in a sample are disclosed herein. The methods, devices, kits and compositions of the present invention may be used to confirm the presence or absence of roundworm, whipworm and/or hookworm in a fecal sample from a mammal and may also be able to distinguish between one or more helminth infections. Confirmation of the presence or absence of roundworm, whipworm and/or hookworm in the mammal may be made, for example, for the purpose of selecting an optimal course of treating the mammal and/or for the purpose of determining whether the mammal has been rid of the infection after treatment has been initiated.

Claims

1. A method of detecting the presence or absence of one or more helminthic antigens in a sample, the method comprising:

(a) contacting a sample from a mammal with at least two antibodies selected from the group consisting of;

(i) a first antibody capable of specifically binding a roundworm coproantigen, but not a whipworm or hookworm coproantigen;

(ii) a second antibody capable of specifically binding a whipworm coproantigen, but not a roundworm or hookworm coproantigen; and

(iii) a third antibody capable of specifically binding a hookworm coproantigen, but not a whipworm or roundworm coproantigen;

(b) forming antibody-coproantigen complexes in the presence of the coproantigens, if any, in the sample; and

(c) detecting the presence or absence of the antibody-coproantigen complexes, if any.

2. The method of claim 1 wherein:

(a) the first antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO;

12, SEQ ID NO;

13, SEQ ID NO;

14, SEQ ID NO;

15, SEQ ID NO;

16, SEQ ID NO;

19, SEQ ID NO;

20, SEQ ID NO;

21, SEQ ID NO;

22, SEQ ID NO;

23, SEQ ID NO;

26, SEQ ID NO;

27, SEQ ID NO;

28, SEQ ID NO;

29, SEQ ID NO;

30, SEQ ID NO;

38, or Copro6728;

or the first antibody was raised against an extract of whole roundworms, or extract of roundworm reproductive organs, or extract of roundworm intestines;

(b) the second antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO;

3, SEQ ID NO;

4, SEQ ID NO;

5, SEQ ID NO;

6, SEQ ID NO;

7, SEQ ID NO;

8, or SEQ ID NO;

9; and

(c) the third antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO;

33 or SEQ ID NO;

34, or CoproASP5.

3. The method of claim 1 wherein the roundworm coproantigen, hookworm coproantigen, and/or whipworm coproantigen is from a fecal sample.

4. The method of claim 1 wherein the first, second and third antibodies are immobilized on a solid support forming part of an enzyme-linked immunosorbent assay device comprising a lateral flow immunoassay device.

5. The method of claim 1 further comprising the step of contacting the sample with one or more reagents to detect one or more of the group consisting of:

one or more non-worm parasites, heartworm, one or more viruses, one or more fungi, and one or more bacteria.

6. The method of claim 5 wherein the reagents for the detection of any one or all of the one or more non-worm parasites, one or more viruses, one or more fungi and one or more bacteria are one or more antibodies or one or more antigens recognized by antibodies specific for the one or more non-worm parasites, one or more viruses, one or more fungi or one or more bacteria.

11. The method of claim 1 wherein the first antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO:

12, SEQ ID NO;

13, SEQ ID NO;

14, SEQ ID NO;

15, SEQ ID NO;

16, SEQ ID NO;

19, SEQ ID NO;

20, SEQ ID NO;

21, SEQ ID NO;

22, SEQ ID NO;

23, SEQ ID NO;

26, SEQ ID NO;

27, SEQ ID NO;

28, SEQ ID NO;

29, SEQ ID NO;

30, SEQ ID NO;

38, or Copro6728;

or the first antibody was raised against an extract of whole roundworms, or extract of roundworm reproductive organs, or extract of roundworm intestines.

12. The method of claim 1 wherein the second antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO:

3, SEQ ID NO;

4, SEQ ID NO;

5, SEQ ID NO;

6, SEQ ID NO;

7, SEQ ID NO;

8, or SEQ ID NO;

9.

13. The method of claim 1 wherein the third antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO:

33 or SEQ ID NO;

34, or CoproASP5.

14. The method of claim 1 wherein the sample is obtained from a mammal that is a canine or a feline.

15. The method of claim 1 wherein the roundworm is Toxocara canis or Toxocara cati, Toxocara vitulorum, Toxascaris leonina, Baylisascaris procyonis, Ascaridia galli, Parascaris equorum, Ascaris suum, Ascaris lumbricoides, Anisakis simplex, or Pseudoterranova decipiens.

16. The method of claim 1 wherein the whipworm is Trichuris vulpis, Trichuris campanula, Trichuris serrata, Trichuris suis, Trichuris trichiura, Trichuris discolor and Trichocephalus trichiuris.

17. The method of claim 1 wherein the hookworm is Ancylostoma caninum, Ancylostoma braziliense, Ancylostoma duodenal, Ancylostoma ceylanicum, Ancylostoma tubaeforme and Ancylostoma pluridentatum, Necator americanus, and Uncinaria stenocephala.

18. The method of claim 2 wherein the first, second and third antibodies do not specifically bind any coproantigen derived from heartworm.

19. The method of claim 1 wherein the step of detecting the presence or absence of the complexes further includes the step of providing at least one secondary antibody that binds to at least one of the complexes.

20. The method of claim 19 wherein the at least one secondary antibody is labeled.

21. The method of claim 1 wherein one or more of the first, second and third antibodies are labeled.

22. The method of claim 1 wherein the first, second and third antibodies are immobilized on a solid support.

23. The method of claim 22 wherein the solid support forms part of an enzyme-linked immunosorbent assay device.

24. The method of claim 1 further comprising the step of determining the presence or absence of a nucleic acid from the roundworm, whipworm or hookworm.

25. The method of claim 24 wherein the step of determining the presence or absence of the nucleic acid is carried out by using a polymerase chain reaction (PCR)-based assay.

7. A method of diagnosing whether a mammal is infected with one or more parasitic worms, the method comprising the steps of:

(a) contacting a sample from a mammal with at least two antibodies selected from the group consisting of;

(i) a first antibody capable of specifically binding a roundworm coproantigen, but not a whipworm or hookworm coproantigen;

(ii) a second antibody capable of specifically binding a whipworm coproantigen, but not a roundworm or hookworm coproantigen; and

(iii) a third antibody capable of specifically binding a hookworm coproantigen, but not a whipworm or roundworm coproantigen;

(b) forming antibody-coproantigen complexes in the presence of the coproantigens, if any, in the sample;

(c) detecting the presence or absence of the antibody-coproantigen complexes, if any; and

(d) diagnosing the mammal as having;

(i) a roundworm infection if a roundworm antibody-coproantigen complex is present;

(ii) a whipworm infection if a whipworm antibody-coproantigen complex is present; and

(iii) a hookworm infection if a hookworm antibody-coproantigen complex is present.

8. The method of claim 7 wherein:

(a) the first antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO;

12, SEQ ID NO;

13, SEQ ID NO;

14, SEQ ID NO;

15, SEQ ID NO;

16, SEQ ID NO;

19, SEQ ID NO;

20, SEQ ID NO;

21, SEQ ID NO;

22, SEQ ID NO;

23, SEQ ID NO;

26, SEQ ID NO;

27, SEQ ID NO;

28, SEQ ID NO;

29, SEQ ID NO;

30, SEQ ID NO;

38, or Copro6728;

or the first antibody was raised against an extract of whole roundworms, or extract of roundworm reproductive organs, or extract of roundworm intestines;

(b) the second antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO;

3, SEQ ID NO;

4, SEQ ID NO;

5, SEQ ID NO;

6, SEQ ID NO;

7, SEQ ID NO;

8, or SEQ ID NO;

9; and

(c) the third antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO;

33 or SEQ ID NO;

34, or CoproASP5.

9. The method of claim 7 further comprising the step of contacting the sample with one or more reagents to detect one or more of the group consisting of:

one or more non-worm parasites, heartworm, one or more viruses, one or more fungi, and one or more bacteria.

10. The method of claim 9 wherein the reagents for the detection of any one or all of the one or more non-worm parasites, one or more viruses, one or more fungi and the one or more bacteria are one or more antibodies or one or more antigens recognized by antibodies specific for one or more non-worm parasites, one or more viruses, one or more fungi or one or more bacteria.

26. The method of claim 7 wherein the first antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO:

12, SEQ ID NO;

13, SEQ ID NO;

14, SEQ ID NO;

15, SEQ ID NO;

16, SEQ ID NO;

19, SEQ ID NO;

20, SEQ ID NO;

21, SEQ ID NO;

22, SEQ ID NO;

23, SEQ ID NO;

26, SEQ ID NO;

27, SEQ ID NO;

28, SEQ ID NO;

29, SEQ ID NO;

30, SEQ ID NO;

38, or Copro6728;

or the first antibody was raised against an extract of whole roundworms, or extract of roundworm reproductive organs, or extract of roundworm intestines.

27. The method of claim 7 wherein the second antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO:

3, SEQ ID NO;

4, SEQ ID NO;

5, SEQ ID NO;

6, SEQ ID NO;

7, SEQ ID NO;

8, or SEQ ID NO;

9.

28. The method of claim 7 wherein the third antibody is capable of specifically binding a polypeptide comprising an amino acid sequence of SEQ ID NO:

33 or SEQ ID NO;

34, or CoproASP5.

29. The method of claim 7 wherein the mammal is a canine or a feline.

30. The method of claim 7 wherein the roundworm is Toxocara canis or Toxocara cati, Toxocara vitulorum, Toxascaris leonina, Baylisascaris procyonis, Ascaridia galli, Parascaris equorum, Ascaris suum, Ascaris lumbricoides, Anisakis simplex, or Pseudoterranova decipiens.

31. The method of claim 7 wherein the whipworm is Trichuris vulpis, Trichuris campanula, Trichuris serrata, Trichuris suis, Trichuris trichiura, Trichuris discolor and Trichocephalus trichiuris.

32. The method of claim 7 wherein the hookworm is Ancylostoma caninum, Ancylostoma braziliense, Ancylostoma duodenal, Ancylostoma ceylanicum, Ancylostoma tubaeforme and Ancylostoma pluridentatum, Necator americanus, and Uncinaria stenocephala.

33. The method of claim 7 wherein the step of detecting the presence or absence of the complexes further includes the step of providing at least one secondary antibody that binds to the one or more complexes.

34. The method of claim 33 wherein the secondary antibody is labeled.

35. The method of claim 7 wherein the first, second and third antibodies are immobilized on a solid support.

36. The method of claim 35 wherein the solid support forms part of an enzyme-linked immunosorbent assay device.

37. The method of claim 36 wherein the enzyme-linked immunosorbent assay device is a lateral flow immunoassay device.

38. The method of claim 7 further comprising the step of determining the presence or absence of a nucleic acid from the roundworm, whipworm and hookworm.

39. The method of claim 38 wherein the step of determining presence or absence of the nucleic acid is carried out by using a polymerase chain reaction (PCR)-based assay.