How To Do Win7's no-reformat, nondestructive reinstall. Source: Windows Secrets. By Fred Langa. Microsoft won't tell you this, but you can do a fast, nondestructive, in-place, total reinstall of Windows 7 without damaging your user accounts, data, installed programs, or system drivers.y Fred Langa. Microsoft won't tell you this, but you can do a fast, nondestructive, in-place, total reinstall of Windows 7 without damaging your user accounts, data, installed programs, or system drivers.
Positive chemotaxis is movement toward the source of the chemical stimulus (along the chemical concentration gradient in air or water); negative chemotaxis is movement away from the source. The phenomenon is known to exist in a number of microorganisms and invertebrates.
What Abnormal Results Mean. An abnormal (positive) result means you have been infected with the bacteria that cause TB. You may need treatment to lower the risk of the disease coming back (reactivation of the disease). A positive skin test does not mean that a person has active TB.