Mononucleosis, Photomicrograph of Cells

This so-called "Downy cell" is typical of lymphocytes infected by EBV (Epstein Barr Virus) or CMV (Cytomegalovirus) in infectious mononucleosis. Downy cells may be classified as types I, II, or III. This is a type II Downy cell.

Mononucleosis, Photomicrograph of Cells

This is a lymphocyte that has been infected by the Epstein-Barr Virus (EBV) or Cytomegalovirus (CMV) in infectious mononucleosis and is referred to as a "Downy cell". Downy cells may be classified as types I, II, or III; this is a type I Downy cell.

Infectious Mononucleosis #3

Infectious mononucleosis is caused by the Epstein-Barr virus. It is a viral infection causing high temperature, sore throat, and swollen lymph glands. Infectious mononucleosis can be contagious if the infected person comes in close or intimate contact with another person through saliva or sexual contact.

Acrodermatitis

Acrodermatitis enteropathica is a skin condition peculiar to children that may be accompanied by mild symptoms of fever and malaise. It may also be associated with hepatitis B infection or other viral infections. The lesions appear as small coppery-red, flat-topped firm papules that appear in crops and sometime in long linear strings, often symmetric.

Splenomegaly

Splenomegaly is an enlargement of the spleen.

Infectious Mononucleosis

Swollen lymph nodes, sore throat, fatigue and headache are some of the symptoms of mononucleosis, which is caused by the Epstein-Barr virus. It is generally self-limiting and most patients can recover in 4 to 6 weeks without medications.

Mononucleosis, Photomicrograph of Cell

This picture shows large, atypical lymphocytes (white blood cells). These cells are seen in viral infections, most commonly caused by the Epstein-Barr virus (infectious mononucleosis), cytomegalovirus diseases, and occasionally infectious hepatitis. This is an example of a type I Downy cell.

Gianotti-Crosti Syndrome on the Leg

Gianotti-Crosti disease is associated with hepatitis B infection and is also called acrodermatitis of childhood. These red, elevated lesions (papules) do not contain pus (non-purulent) and can occur on the extremities, buttocks, face, and neck. A similar appearing condition is associated with other types of infection an is referred to as a syndrome rather than a disease. (Other diseases include RSV, EBV, cytomegalovirus, coxsackie, streptococcus and several others)

Mononucleosis - View of the Throat

Infectious mononucleosis causes a sore throat, enlarged lymph nodes, and fatigue. The throat may appear red and the tonsil(s) covered with a whitish material (exudate). Mononucleosis and sever streptococcal tonsillitis appear quite similar. Unless there are other findings to suggest mononucleosis, a throat culture and blood studies may be necessary to make an accurate diagnosis.

Mononucleosis - Mouth

Infectious mononucleosis is caused by the Epstein-Barr virus. In teenagers and young adults, there is frequently a sore throat and red tonsils with whitish spots (exudate), as seen in this picture. Enlarged lymph nodes and fatigue are also common.

Antibodies

Antigens are large molecules (usually proteins) on the surface of cells, viruses, fungi, bacteria, and some non-living substances such as toxins, chemicals, drugs, and foreign particles. The immune system recognizes antigens and produces antibodies that destroy substances containing antigens.