11. Pathogenicity is seen to differ among trees of varying age and location.12. Multiple experiments to prove the existence of pathogenicity have turned up inconclusive. 13. Bacteria are tested for pathogenicity by inoculating multiple citrus species with the bacterium. 14. There are various combinations of regulation involving pathogenicity islands. 15. Bacterial ABC transporters are essential in cell viability, virulence, and pathogenicity . 16. The distinction concerns pathogenicity in poultry, not humans. 17. However, the molecular nature of its pathogenicity remained unknown for three decades. 18. The pathogenicity of several mutations has been verified in model systems such as yeast. 19. In order to be able to colonize the plant they have specific pathogenicity factors. 20. Evidence suggests that " symbiosis islands " exist and share similarities to pathogenicity islands.
