Category: H

A preparation of antigenic material from a culture of the fungus Histoplasma capsulatum, used to test for the presence of the disease histoplasmosis by subcutaneous injection. An antigen prepared from cultures of Histoplasma capsulatum and used as a skin test for the diagnosis of histoplasmosis.  

A genus of parasitic yeast-like fungi. The species H. capsulatum causes the respiratory infection histoplasmosis.  

An enzyme, widely distributed in the body, that is responsible for the inactivation of histamine.    

A genus of small flies. The adults of H. pallipes are suspected of transmitting yaws in the West Indies. Other species of Hippelates may be involved in the transmission of conjunctivitis.  

The amino derivative of a hexose sugar. The two most important hexosamines are glucosamine and galactosamine. A sugar containing an amino group in place of a hydroxyl group (e.g., glucosamine).  

An enzyme that catalyzes the conversion of glucose to glucose-6-phosphate. This is the first stage of glycolysis.  

An intermediate-acting ‘barbiturate administered by mouth to treat insomnia. Prolonged use can lead to dependence.  

An antiseptic with a wide range of antibacterial activity, used to treat infections and inflammation of the urinary tract, such as cystitis. High doses may cause irritation of the stomach or bladder. A substance which, when excreted by the kidneys, releases formaldehyde which has an antiseptic action. It is given to patients with recurrent cystitis.…

The ability to distinguish only six of the seven colors of the spectrum, the exception being indigo. Most people cannot distinguish indigo from blue or violet.  

The grafting of tissue from an animal of one species to another. The surgical process of relocating skin, tissue, or organs from one person to another.