Dr. Vivian Negar Shirvani M.D., M.P.H.

These are dendritic skin cells and contain Birbeck granules which is an organelle. In almost all the layers of the epidermis, langerhans cells are found. In the stratum spinosum they are the most prominent. Also, in the papillary dermis they occur. They are also found in the mucosa of the vaginal...

This bacterial disease was first identified in the Rocky Mountains, but is also found in the south eastern part of United States, Canada, Mexico, Central America, and South America. The potentially fatal disease is spread by the bites of wood ticks or dog ticks. Spring and summer seasons see a...

Caused by bacteria and viruses, meningitis is an inflammation (swelling) of the protective membranes covering the brain and spinal cord known as the meninges. The inflammation is usually caused by an infection of the fluid surrounding the brain and spinal cord. It can develop as a result of injury,...

The main difference between AIDS and HIV is that HIV is a virus whereas AIDS is a condition that is caused by HIV. People often confuse HIV and AIDS. Different diagnoses are used to identify both HIV and AIDS. However, they are said to go hand-in-hand and are very often used interchangeably to...

Acquired Immunodeficiency syndrome, or AIDS, is a disease that develops in the advanced stages of infection by human immunodeficiency virus (HIV). Infection by HIV weakens the immune system of the person by destroying the CD4 cells, the primary infection fighters of the body. A person is said to...

Meningitis occurs when the meninges, the protective membranes surrounding the brain and spinal cord, get inflamed or irritated. Meningitis is an outcome of certain bacteria or viruses entering the body when our immune system is weak.These bacteria and viruses live in the nose, throat, or the...