Your metabolism is the rate at which you burn off energy from the food you eat. Everybody's metabolism is slightly different, so everybody has slightly different needs when it comes to calories. As a general rule, the smaller and more physically active you are, the faster your metabolism.
Giardiasis is an intestinal infection of man and animals caused by a protozoan parasite Giardia intestinalis (also known as Giardia lamblia). Giardia is a simple one-celled parasitic species; it is not a worm, bacteria or virus. The parasite occurs worldwide and is a common cause of Traveler's Diarrhea in people.
Viruses are the most common cause of pericarditis. The viruses that most commonly cause viral pericarditis are the Enteroviruses (i.e., Coxsackieviruses A and B and Echovirus). Less common causes of viral pericarditis include: herpes viruses, adenoviruses, influenza virus, human immunodeficiency virus, and mumps virus.