Methods and apparatus for harvesting vaccine from eggs

1. A method of identifying whether an egg contains a live embryo, comprising:

illuminating the egg with light from a first light source and with light from a second light source;

receiving light passing through the egg from the first and second light sources by a detector positioned adjacent the egg; and

identifying the egg as containing a live embryo if a ratio of detected light from the first light source to detected light from the second light source is less than a first preset value and if detected light from the second light source is less than a second preset value.

2. The method of claim 1 , further comprising identifying the egg as a non-live egg if a ratio of detected light from the first light source to detected light from the second light source is greater than or equal to the first preset value and if detected light from the second light source is less than the second preset value.

3. The method of claim 1 , wherein light from the first light source has a first mean wavelength value and wherein light from the second light source has a second mean wavelength value that is different from the first mean wavelength value.

4. The method of claim 1 , wherein illuminating the egg with light from a first light source comprises illuminating the egg with light at one or more wavelengths selected from the wavelength bands consisting of 830 nm–1000 nm, 710 nm–800 nm, 880 nm–900 nm, and wherein illuminating the egg with light from a second light source comprises illuminating the egg with light at one or more wavelengths selected from the wavelength bands consisting of 700 nm–830 nm, 700 nm–775 nm, 830 nm–880 nm.

5. The method of claim 1 , wherein illuminating the egg with light from a first light source comprises directing one or more pulses of light at the egg at wavelengths selected from the wavelength bands consisting of 830 nm–1000 nm, 710 nm–800 nm, 880 nm–900 nm, and wherein illuminating the egg with light from a second light source comprises directing one or more pulses of light at the egg at wavelengths selected from the wavelength bands consisting of 700 nm–830 nm, 700 nm–775 nm, 830 nm–880 nm.

6. The method of claim 1 , wherein the ratio of detected light from the first light source to detected light from the second light source comprises dividing a value of detected light from the first light source by a value of detected light from the second light source.

7. The method of claim 1 , wherein the ratio of detected light from the first light source to detected light from the second light source comprises dividing a value of detected light from the second light source by a value of detected light from the first light source.

8. The method of claim 1 , wherein the ratio of detected light from the first light source to detected light from the second light source comprises an arithmetic difference between a value of detected light from the second light source and a value of detected light from the first light source.

9. The method of claim 1 , wherein the first and second light sources are positioned adjacent a portion of the egg and wherein the detector is positioned adjacent an opposite portion of the egg.

10. The method of claim 9 , wherein the first and second light sources are positioned on one end of the egg and wherein the detector is positioned on a respective opposite end portion of the egg.

11. The method of claim 1 , wherein at least one of the first and second light sources comprises a light emitting diode (LED).

12. The method of claim 1 , wherein the egg is between day eight of incubation and day twelve of incubation (Day 8–Day 12 egg).

13. A method of producing a vaccine within a plurality of eggs, comprising:

illuminating each egg with light from a first light source and with light from a second light source;

receiving light passing through each egg from the first and second light sources by a detector positioned adjacent each egg;

identifying an egg as containing a live embryo if a ratio of detected light from the first light source to detected light from the second light source is less than a first preset value and if detected light from the second light source is less than a second preset value; and

injecting a virus into each egg identified as containing a live embryo.

14. The method of claim 13 , further comprising identifying an egg as a non-live egg if a ratio of detected light from the first light source to detected light from the second light source is greater than or equal to the first preset value and if detected light from the second light source is less than the second preset value.

15. The method of claim 14 , further comprising discarding each egg identified as a non-live egg.

16. The method of claim 13 , wherein light from the first light source has a first mean wavelength value and wherein light from the second light source has a second mean wavelength value that is different from the first mean wavelength value.

17. The method of claim 13 , wherein illuminating each egg with light from a first light source comprises illuminating each egg with light at one or more wavelengths selected from the wavelength bands consisting of 830 nm–1000 nm, 710 nm–800 nm, 880 nm–900 nm, and wherein illuminating each egg with light from a second light source comprises illuminating the egg with light at one or more wavelengths selected from the wavelength bands consisting of 700 nm–830 nm, 700 nm–775 nm, 830 nm–880 nm.

18. The method of claim 13 , wherein illuminating each egg with light from a first light source comprises directing one or more pulses of light at each egg at wavelengths selected from the wavelength bands consisting of 830 nm–1000 nm, 710 nm–800 nm, 880 nm–900 nm, and wherein illuminating each egg with light from a second light source comprises directing one or more pulses of light at each egg at wavelengths selected from the wavelength bands consisting of 700 nm–830 nm, 700 nm–775 nm, 830 nm–880 nm.

19. The method of claim 13 , wherein the ratio of detected light from the first light source to detected light from the second light source comprises dividing a value of detected light from the first light source by a value of detected light from the second light source.

20. The method of claim 13 , wherein the ratio of detected light from the first light source to detected light from the second light source comprises dividing a value of detected light from the second light source by a value of detected light from the first light source.

21. The method of claim 13 , wherein the ratio of detected light from the first light source to detected light from the second light source comprises an arithmetic difference between a value of detected light from the second light source and a value of detected light from the first light source.

22. The method of claim 13 , wherein the first and second light sources are positioned adjacent a portion of each egg and wherein the detector is positioned adjacent an opposite portion of each egg.

23. The method of claim 22 , wherein the first and second light sources are positioned on one end of each egg and wherein the detector is positioned on a respective opposite end portion of each egg.

24. The method of claim 13 , wherein at least one of the first and second light sources comprises a light emitting diode (LED).

25. The method of claim 13 , wherein the eggs are between day eight of incubation and day twelve of incubation (Day 8–Day 12 eggs).

26. The method of claim 13 , further comprising:

euthanizing an embryo in each egg identified as containing a live embryo; and

harvesting amniotic fluid from each euthanized egg, wherein the amniotic fluid comprises vaccine.

27. The method of claim 26 , wherein the virus comprises human flu virus and wherein the harvested amniotic fluid comprises human flu vaccine.