Category: T

Abnormal red blood cell (erythrocyte) with a ringed appearance; associated with several types of anemia. An abnormal form of red blood cell (erythrocyte) in which the cell assumes the ringed appearance of a ‘target’ in stained blood films. Target cells are a feature of several types of anemia, including those due to iron deficiency and…

Late-occurring, especially in reference to symptoms of a disease. Characterized by lateness, especially pert, to a disease in which the characteristic sign or symptom appears late in the course of the disease.  

Intestinal infection caused by a species of parasitic tapeworm, usually the result of eating raw or undercooked meat or fish that is an intermediate host to the tapeworm or its larva. Symptoms include diarrhea and weight loss; diagnosis is made when worms and eggs are found in the stool.  

Process by which pigmentation of the skin darkens because of exposure to ultraviolet light.  

Disorder characterized by an absence of pulse in both arms and in the carotid arteries, transient paraplegia, and facial muscle weakness and atrophy caused by progressive occlusion of the left subclavian and left common carotid arteries above the aortic arch; also called pulseless disease. A rare vasculitis of the aorta and its branches, marked by…

A culture of a given microbiological species (normally provided by the original discoverer) which faithfully reproduces all aspects and reactions recorded under the title, and is held in a (usually national) collection of type cultures. To avoid variation in storage such cultures are usually preserved by freeze-drying. A culture of standard strains of bacteria that…

Statutory test (UK) applicable to sterilized milk. Proteins in 20 ml of milk are precipitated with ammonium sulphate and filtered out, and the filtrate boiled for 5 minutes. In duly sterilized milk no protein uncoagulable by the sulphate remains and the filtrate re¬ mains clear after boiling.  

Culture-concentration method for the treatment of sputum etc. prior to microscopy and culture for mycobacteria. Ten per cent anhydrous Na3P04 is applied for 24 hours at 37° C, followed by centrifugation and washing. The method is possibly less toxic than that of Petroff.  

Glyceryl tributyrate in yeast extract agar—a medium cleared by the lipolytic bacteria associated with butter spoilage.  

Pathogenic treponema indistinguishable from Treponema pallidum, but causing yaws—a non-venereal granulomatous condition with none of the complications of advanced syphilis— which occurs in tropical zones. Diagnosis and treatment are as for Treponema pallidum.