According to reports, there were 40,000 tigers in India a century ago. The country is home to 40% of the world's tigers, with 23 tiger reserves in 17 states. The 2006 count found a steep fall in India's tiger population to 1,411 from 3,642 animals in a federal census in 2002. Poaching and urbanisation are blamed for the decline in tiger numbers in the country.
Cerebrospinal fluid (CSF) analysis is a group of laboratory tests that measure chemicals in the fluid that surrounds and protects the brain and spinal cord. The tests may look for proteins, sugar (glucose), and other substances. A sample of CSF is needed. A lumbar puncture, also called a spinal tap, is the most common way to collect this sample. Less common ways to take a fluid sample include: 1  Cisternal puncture.  Removal of CSF from a tube that is already in the CSF, such as a shunt, ventricular drain, or pain pump.
CSF is produced by the choroid plexus, a thin sheet of tissue found only in the four ventricles. CSF prevents the brain, which weighs approximately 1500 grams in an adult, from collapsing upon itself and from harm due to impact or injury.