A form of
is spread by insects. Kala-azar occurs
in parts of Africa, India, the Mediter-
ranean, and South America.
as an ingredient in some
Kaolin is taken orally and in-
creases the bulk of faeces. It is also
believed to adsorb
in the intestine, transporting
them through the digestive tract for
excretion in the faeces.
A cancerous tumour
arising from blood vessels, usually in
the skin. Kaposi's sarcoma usually only
occurs in those people who have
The tumours, which consist of pinkish-
brown raised areas or flat patches, can
spread rapidly. They usually start on the
feet and ankles, spread up the legs, and
then appear on the hands and arms.
Tumours can also affect the gastroin-
testinal and respiratory tracts, where they
may cause severe internal bleeding. Skin
lesions may be treated with
may be used for wide-
spread skin disease or internal lesions.
The characteristics of
, in terms of number, size, and
structure, in an individual or a species.
The term “karyotype” is also applied to a
diagram of chromosome pairs arranged
in their assigned numerical order.
A rare acute illness
of unknown cause that most commonly
affects children under 2. The disease is
characterized by fever lasting
1 - 2
, dryness and cracking of
the lips, swollen
in the neck,
reddening of the palms and soles, and a
generalized rash. By the end of the 2nd
week of illness, the skin at the tips of
the fingers and toes peels and other
symptoms subside. The heart muscle
are affected in
in 5 cases. High dose
may be given to
prevent associated heart complications.
Most children recover completely.
A raised, hard, irregularly shaped,
itchy scar on the skin due to a defective
healing process in which too much
is produced, usually after a skin
injury. Keloids can develop anywhere on
the body, but the breastbone and shoul-
der are common sites. Black people are
affected more than whites. After several
months, most keloids flatten and cease
to itch. Injection of
into the keloid may reduce itchiness
more quickly and cause some shrinkage.
that is the
main constituent of the tough outer-
most layer of the
k eratitis Inflammation of the
often takes the form of a
and may result from injury, contact with
chemicals, or an infection. Symptoms of
keratitis include pain and excessive
watering of the eye, blurring of vision,
is treated by covering the affected eye.
Drugs such as
may be given
to treat infective keratitis,
k eratoacan thom a A type of harmless
skin nodule that commonly occurs in
elderly people, most often on the face
or arm. The cause is unknown, but many
years of exposure to strong sunlight or
long-term use of
may be factors. Initially, the nod-
ule resembles a small wart, but it grows
cm across in about
Although the nodule usually disappears
gradually after this, surgical removal is
often recommended to prevent scarring.