Other Names |
Syph, dirty blood, bad blood,
the pox |
Cause |
Bacteria - Treponema pallidum,
also known as the spriochaete because of its corkscrew appearance |
Distribution |
Worldwide |
Transmission |
- Sexual - by direct contact with
infectious sores or rashes.
- Mother to child - this mau occur
during pregnancy, causing congenital syphilis
|
Incubation |
9 - 90 days (average 21 days) |
Symptoms |
Syphilis is described as having
4 stages: |
|
Primary syphilis: An oval
shaped ulcer (sore) known as the chancre (pronounced shanker)
appears at the site of entry of the bacteria and nearby lymph
glands become swollen but not tender. The ulcer is typically
painless and feels hard. In heterosexual males, chancres usually
appear on the head or foreskin of the penis but in homosexual
males, they may occur at or near the anus or actually inside
the anal canal or the rectum. In women, they may appear
on the labia, the skin around the vaginal opening. Internal chancres
(that is, those on the cervix or in the anal canal often go unnoticed.
The chancre heals spontaneously after 2 - 6 weeks but infection
continues to spread throughout the body, culminating in secondary
syphilis. |
|
Secondary syphilis: The
symptoms of secondary syphilis appear 4 - 8 weeks after the appearance
of the chancre. They include non-itchy scalp rashes all over
the body, particularly on the palms and soles, patchy hair
loss, sore throat, fleshy wart-like growths known as condylomata
lata on, in or around the genitals and anus and generalised
swelling of the lymph glands. There may be associated fever,
malaise (feeling of illness), weight loss and loss of appetite.
The symptoms of secondary syphilis may also disappear spontaneously
after 2 - 4 weeks. When this happens, syphilis is described as
having entered the latent or hidden stage. |
|
Latent syphilis: Latent
syphilis does not show any symptoms but infection can be detected
through blood tests. It is divided into early and late latent
syphilis. Early means that the infection is less than 2 years
and late when it is more.Latent syphilis may go on for 5 - 20
years. Despite the absence of symptoms, damage still occurs,
culminating eventually in the final stage - tertiary syphilis. |
|
Tertiary syphilis: Tertiary
syphilis is not infectious because the bacteria are deep within
tissues rather than on the surface where they can be easily transmitted.
However, they are very destructive and can damage important
organs such as the brain and nervous system (neurosyphilis) and
the heart and its great vessels (cardiovascular syphilis) or
it may severely deform bones, joints and the skin. Neurosyphilis
may result in insanity, dementia (mental deterioration),
paralysis and incontinence and cardiovascular syphilis may cause
chest pain and heart failure. Both neurosyphilis and cardiovascular
syphilis may be fatal. |
Diagnosis |
- Physical examination.
- Darkground microscopic examination
of secretions from sores or condylomata lata.
- Blood tests for example the Venereal
Disease Reference Laboratory (VDRL), Treponema pallidum haemagglutination
(TPHA) and the Fluorescent antibody absorption (FTA-ABs) tests.
|
Treatment |
Penicillin injections are the
best treatment but alternative antibiotics may be used if the
person is allergic to penicillin. |
Complications: |
- Syphilis may progress, causing
severe damage to important organs such as the brain and the heart
and may cause death.
- A pregnant woman can transmit
infection to the unborn causing congenital syphilis. Severely
affected babies may die and survivors may develop rashes, blindness,
deafness and bone deformities.
|
Comments |
- Treatment during the early stages
of syphilis, that is primary, secondary and latent syphilis will
result in complete cure and no long-term disability. However,
tretment of tertiary syphilis will prevent further progression
or deterioration but will not reverse the damage that has been
done. This is why early treatment is vital.
- Syphilis may skin stages. A person
may develop secondary syphilis without developing chancre or
latent syphilis may develop without a preceding primary or secondary
stage.
- Congenital syphilis may be prevented
by screening during pregnancy.
- The VDRL test may be positive
during pregnancy and does not necessarily indicate syphilis infection.
Other blood tests are necessary to confirm the diagnosis of syphilis
during pregnancy.
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