Webster's New World Medical Dictionary

travelers’ diarrhea
Diarrhea that results from
infections acquired while traveling to another coun-
try. Among the causes of travelers’ diarrhea are
enterotoxigenic Escherichia coli and a variety of
viruses.
treadmill
A machine with a moving strip on
which one walks without moving forward. A tread-
mill was originally a wide wheel turned by the
weight of people climbing on steps around its edge,
used in the past to provide power for machines or
as a punishment in prisons. The treadmill today
serves as a device to maintain physical fitness. It is
also an essential component of the exercise tread-
mill test, a stress test for heart disease.
treadmill, exercise
See 
exercise treadmill.
tremor
An abnormal, repetitive shaking move-
ment of the body. Tremors have many causes and
can be inherited, related to illnesses (such as thy-
roid disease), or caused by fever, hypothermia,
drugs, or fear.
trench fever
A disease borne by body lice that
was first recognized in the trenches of World War I,
when it is estimated to have affected more than 1
million people. Trench fever is still seen endemi-
cally in Mexico, Africa, Eastern Europe, and else-
where. Urban trench fever occurs among homeless
people and street alcoholics, and outbreaks have
been documented in US cities. The cause of trench
fever is Bartonella quintana (previously called
Rochalimaea quintana), an unusual type of bacteria
that multiply in the gut of the body louse.
Transmission to people occurs when infected louse
feces are rubbed into abraded (scuffed) skin or into
the whites of the eyes. The disease is classically a 5-
day fever, characterized by the sudden onset of high
fever, severe headache, back pain and leg pain, and
a fleeting rash. Recovery takes a month or more,
and relapses are common. Also known as Wolhynia
fever, shinbone fever, quintan fever, five-day fever,
Meuse fever, His disease, His-Werner disease, and
Werner-His disease. See also 
Bartonella quintana;
rickettsial disease.
trench foot
A painful condition caused by expo-
sure of the foot for several days. Trench foot was
common during trench warfare in World War I and
World War II, when soldiers stood for days and
weeks in wet, muddy ditches without being able to
change their footwear; today it is seen most fre-
quently in urban homeless people. The feet become
numb, turn red and then blue, develop blisters, and
become infected. Gangrene may set in. Untreated
trench foot can lead to the need for amputation due
to gangrene; it can even lead to death.