What is PANDAS?

http://pandasnetwork.org/understandingpandaspans/about-pandaspans/whatispandas/

THis is the site that I looked over when trying to figure out what was going on with my son,  who literally changed overnight and was barking like a dog every few seconds with no ability to stop himself.

FAQ about PANDAS

http://www.nimh.nih.gov/health/publications/pandas/index.shtml

PANDAS, is an abbreviation for Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections. The term is used to describe a subset of children who have Obsessive Compulsive Disorder (OCD) and/or tic disorders such as Tourette Syndrome, and in whom symptoms worsen following strep infections such as "Strep throat" and Scarlet Fever.

The children usually have dramatic, "overnight" onset of symptoms, including motor or vocal tics, obsessions, and/or compulsions. In addition to these symptoms, children may also become moody, irritable or show concerns about separating from parents or loved ones. This abrupt onset is generally preceeded by a Strep throat infection.