Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «T»:
Typhus, louse-borne: See: Typhus, epidemic....
Typhus, mite-borne: See Typhus, scrub....
Typhus, murine: An acute infectious disease with fever,
headache, and rash, all quite similar to, but milder than, epidemic typhus, caused by a
related microorganism, Rickettsia typhi (mooseri), transmitted to humans by rat fleas
(Xenopsylla cheopis). The animal reservoir includes rats, mice and oth...
Typhus, Queensland tick
Typhus, Queensland tick: See: Queensland tick typhus....
Typhus, rat-flea: See Typhus, murine....
Typhus, scrub: A mite-borne infectious disease caused
by a microorganism, Rickettsia tsutsugamushi, characteristically with fever, headache, a
raised (macular) rash, swollen glands (lymphadenopathy) and a dark crusted ulcer (called
an eschar or tache noire) at the site of the chigger (mite larva) bi...
Typhus, tick: Also known as Rocky Mountain spotted fever, an acute febrile
(feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks. Occurs only in the Western Hemisphere. Anyone frequenting tick-infested areas i...
Typhus, tropical: See Typhus, scrub....
Typhus, urban. of Malaya
Typhus, urban of Malaya: Murine typhus, an acute
infectious disease with fever, headache, and rash, all quite similar
to, but milder than,
epidemic typhus. It is caused by a related microorganism, Rickettsia
typhi (mooseri), transmitted
to humans by rat fleas (Xenopsylla cheopis). The animal rese...
Typist's cramp: A dystonia that
affects the muscles of the hand and sometimes the forearm and only occurs during
handwriting. Similar focal dystonias have also been called writer's cramp,
pianist's cramp, musician's cramp, and golfer's cramp. ...
Tyr: Tyrosine. See also: Amino acid symbols....
Tyrosine: An amino acid, one of the 20 building blocks of protein. A nonessential amino acid, tyrosine is produced from another amino acid, phenylalanine. Deficiency of the enzyme phenylalanine hydroxylase that catalyzes this reaction causes the genetic disease called phenylketonuria (PKU). Tyrosine...
Tyrosinemia: A genetic disorder involving the metabolism of the amino acid tyrosine characterized by abnormally high levels of tyrosine in blood (hypertyrosinemia) and urine (tyrosinuria). There are several different forms of tyrosinemia.
The classic form, tyrosinemia type I, is due to deficiency o...
Tyrosinemia type I
Tyrosinemia type I: A metabolic genetic disease characterized by abnormally high levels of amino acid tyrosine in blood (hypertyrosinemia) and urine (tyrosinuria) due to deficiency of an enzyme called fumarylacetoacetic hydrolase, the last enzyme in the tyrosine pathway. Tyrosinemia type I is inheri...
Tyrosinemia type II
Tyrosinemia type II: A metabolic genetic disease due to deficiency of the enzyme tyrosine transaminase. The disease is characterized by the deposition of crystals of tyrosine in the skin and eyes. Thickened areas (keratoses) on the palms and soles become painful and ulcers develop in the cornea. The...