Asthenosphere Asthenosphere, Layer beneath the lithosphere. The asthenosphere is the layer of our planet that lies beneath the lithosphere. It was first named by J. Barrell, a British geologist when he divided the interior of the Earth into three parts. The lithosphere is the outer layer of the Earth that contains crustal plates.
It is wise, however, to have the test repeated by a different laboratory using a different technique (Western Blot). Mother cats with FIV pass antibody to their kittens whether the kittens become infected or not. So positive test results in kittens do not mean they harbor the virus of FIV. If kittens are positive, they need to be retested every two months until they are six months old to see if the test becomes negative. If the test is still positive at six month, they probably have the disease.
Antibody tests (Rapid tests) â give a positive result based on antibodies to HIV, not the virus itself. 1  2-8 weeks (up to 2 months) after infection, most people will have enough antibodies to test positive. 2  12 weeks (3 months) after infection, about 97% of people will have enough antibodies to test positive.here's a period of time after a person is infected during which they won't test positive. This is called the âhiv window period.â. The window period can be from 9 days to 3-6 months, depending on the person's body and on the HIV-test that's used.