Bacterial vaginosis screening technique and a diagnostic kit for use therein

• US 6,255,066 B1
• Filed: 02/08/2000
• Issued: 07/03/2001
• Est. Priority Date: 02/08/2000
• Status: Expired due to Fees

• Current Assignee: Allan L. Louderback
• Original Assignee: Allan L. Louderback
• Inventors: Louderback, Allan L.
• Primary Examiner(s): Leary, Louise N.
• Application Number:
  US09/499,802
• Time in Patent Office: 511 Days
• Field of Search: 435/34, 435/4, 436/111
• US Class Current: 435/34
• CPC Class Codes: C12Q 1/04 Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor C12Q1/6897 takes precedence
• CPC Class Codes: Y10T 436/173845 Amine and quaternary ammonium

Abstract

A screening test for bacterial vaginosis is performed by (a) combining a sample of vaginal fluid with a developer reagent selected from the group consisting of phenol, derivatives thereof, and mixtures thereof to form a first reaction medium; (b) combining the first reaction medium with a water soluble base and a halogen-containing oxidizing agent to form a second reaction medium having a pH of at least about 9.5; and (c) observing the color of the second reaction medium. The concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.12 or greater (on a molar basis) than the concentration of the developer reagent in the second reaction medium. The foregoing procedure can be used to test for the presence of amines in any aqueous fluid as well as for synthesizing various dyes.

Claims

1. A method for screening for the presence of bacterial vaginosis, the method comprising the steps of:

(a) combining a sample of vaginal fluid with a developer reagent selected from the group consisting of phenol, derivatives thereof, and mixtures thereof to form a first reaction medium;

(b) combining the first reaction medium with a water soluble base and a halogen-containing oxidizing agent to form a second reaction medium having a pH of at least about 9.5;

(c) observing the color of the second reaction medium, where the concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.12 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

2. The method of claim 1 where at least a portion of steps (a) and (b) are performed sequentially.

3. The method of claim 1 where at least a portion of steps (a) and (b) are performed simultaneously.

4. The method of claim 1 where the developer reagent is selected from the group consisting of phenol, 2-phenylphenol, 3-phenylphenol, 4-phenylphenol, the alkali metal salts thereof, and mixtures thereof.

5. The method of claim 1 where the developer reagent comprises phenol.

6. The method of claim 1 where the amine selected from the group consisting of monoamines, diamines, homologues thereof, analogues thereof, and mixtures thereof.

7. The method of claim 1 where the amine selected from the group consisting of methylamine, isobutylamine, putrescine, cadaverine, histamine, tyramine, phenylethylamine, and mixtures thereof.

8. The method of claim 1 where the water soluble base comprises an alkali metal salt.

9. The method of claim 1 where the water soluble base is selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, trialkali metal phosphates, and mixtures thereof.

10. The method of claim 1 where the water soluble base is selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, trisodium phosphate, tripotassium phosphate, and mixtures thereof.

11. The method of claim 1 where the water soluble base is selected from the group consisting of sodium hydroxide, potassium hydroxide, and mixtures thereof.

12. The method of claim 1 where the halogen-containing oxidizing agent is selected from the group consisting of chlorine-, bromine-, and iodine-containing oxidizing agents.

13. The method of claim 1 where the halogen-containing oxidizing agent comprises a chlorine-containing oxidizing agent.

14. The method of claim 1 where the halogen-containing oxidizing agent is selected from the group consisting of sodium hypochlorite, trichloroisocyanuric acid, 1-bromo-3-chloro-5-dimethylhydantoin, and mixtures thereof.

15. The method of claim 1 where the halogen-containing oxidizing agent comprises sodium hypochlorite.

16. The method of claim 1 where the pH of the second reaction medium is at least about 10.

17. The method of claim 1 where the pH of the second reaction medium is at least about 10.5.

18. The method of claim 1 where the pH of the second reaction medium is at least about 11.

19. The method of claim 1 where the pH of the second reaction medium is at least about 11.5.

20. The method of claim 1 where the pH of the second reaction medium is at least about 12.

21. The method of claim 1 where the pH of the second reaction medium is at least about 12.25.

22. The method of claim 1 where the pH of the second reaction medium is at least about 12.5.

23. The method of claim 1 where the pH of the second reaction medium is at least about 12.75.

24. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.14 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

25. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.16 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

26. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.18 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

27. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.20 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

28. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.21 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

29. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.22 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

30. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is 0.12 to about 1 times the concentration of the developer reagent in the second reaction medium, on a molar basis.

31. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is 0.14 to about 0.8 times the concentration of the developer reagent in the second reaction medium, on a molar basis.

32. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is 0.16 to about 0.6 times the concentration of the developer reagent in the second reaction medium, on a molar basis.

33. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is 0.18 to about 0.4 times the concentration of the developer reagent in the second reaction medium, on a molar basis.

34. The method of claim 1 where concentration of the halogen-containing oxidizing agent in the second reaction medium is 0.19 to about 0.3 times the concentration of the developer reagent in the second reaction medium, on a molar basis.

35. The method of claim 1 where the vaginal fluid comprises a viable pathogenic substance selected from the group consisting of bacteria, fungi, viruses, and mixtures thereof and where the second reaction medium is substantially free of any viable pathogenic substance.

36. A method for detecting the presence of an amine in a sample of fluid, the method comprising the steps of:

(a) combining the sample of fluid with a developer reagent selected from the group consisting of phenol, derivatives thereof, and mixtures thereof and an amine to form a first reaction medium;

(b) combining the first reaction medium with a water soluble base and a halogen-containing oxidizing agent to form a second reaction medium having a pH of at least about 9.5;

(c) observing the color of the second reaction medium, where the concentration of the halogen-containing oxidizing agent in the second reaction medium is about 0.12 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

37. The method of claim 36 where the fluid is a biological specimen.

38. A diagnostic kit comprising:

(a) a developer reagent selected from the group consisting of phenol, derivatives thereof, and mixtures thereof;

(b) water soluble base; and

(c) a halogen-containing oxidizing agent,

where (i) the concentration of the halogen-containing oxidizing agent in a reaction medium formed by combining the developer reagent, the water soluble base, and the halogen-containing oxidizing agent is about 0.12 or greater, on a molar basis, than the concentration of the developer reagent in the reaction medium and (ii) the pH of the reaction medium is at least about 9.5.

39. A method for synthesizing 2,6-dichloroindophenol or a salt thereof, the method comprising the steps of:

(a) reacting a phenol with an amine to form a first reaction medium; and

(b) combining the first reaction medium with a halogen-containing oxidizing agent and a water soluble dye to form a second reaction medium, where step (b) is conducted under reaction conditions such that the second reaction medium comprises 2,6-dichloroindophenol or a salt thereof.

40. A method for synthesizing a dye, the method comprising the steps of:

(a) reacting a phenol derivative selected from the group consisting of 2-phenylphenol, 3-phenylphenol, 4-phenylphenol, the alkali metal salts thereof, and mixtures thereof with an amine to form a first reaction medium; and

(b) combining the first reaction medium with a halogen-containing oxidizing agent and a water soluble base to form a second reaction medium, where step (b) is conducted under reaction conditions such that the second reaction medium comprises the dye.

41. The dye formed by the method of claim 40.

42. The dye formed by the method of claim 40 where the phenol derivative comprises 2-phenylphenol and the dye is green.

43. A method for preparing a dye comprising the steps of:

(a) reacting a developer reagent selected from the group consisting of phenol, 2-phenylphenol, 3-phenylphenol, 4-phenylphenol, the alkali metal salts thereof, and mixtures thereof with an amine selected from the group consisting of methylamine, isobutylamine, putrescine, cadaverine, histamine, tyramine, phenylethylamine, and mixtures thereof to form a first reaction medium; and

(b) combining the first reaction medium with an alkali metal salt selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, trisodium phosphate, tripotassium phosphate, and mixtures thereof and an oxidizing agent selected from the group consisting of sodium hypochlorite, trichloroisocyanuric acid, and mixtures thereof to form a second reaction medium in which the dye is formed,

where the concentration of the oxidizing agent in the second reaction medium is about 0.12 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium and the pH of the second reaction medium is at least about 9.5.

44. The method of claim 43 where the dye comprises a 2,6-dichloroindophenol salt.

45. The method of claim 43 where the dye prepared in accordance with the method is not indophenol.

46. A method for preparing a dye comprising the steps of:

(a) reacting a developer reagent selected from the group consisting of phenol, derivatives thereof, and mixtures thereof with an amine to form a first reaction medium; and

(b) combining the first reaction medium with a water soluble base and an halogen-containing oxidizing agent to form a second reaction medium having a pH of at least about 9.5 and comprising the dye,

where the concentration of the oxidizing agent in the second reaction medium is about 0.12 or greater, on a molar basis, than the concentration of the developer reagent in the second reaction medium.

47. A method for screening for the presence of bacterial vaginosis, the method comprising the steps of:

(a) combining a sample of vaginal fluid simultaneously or in any desired order with (i) a developer reagent selected from the group consisting of phenol, derivatives thereof, and mixtures thereof, (ii) a water soluble base, and (iii) a halogen-containing oxidizing agent to form a reaction medium having a pH of at least about 9.5;

(b) observing the color of the reaction medium,

where the concentration of the halogen-containing oxidizing agent in the reaction medium is about 0.12 or greater, on a molar basis, than the concentration of the developer reagent in the reaction medium.