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Syphilis

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Syphilis
Classification & external resources
Image of spiral-shaped organisms responsible for causing syphilis
ICD-10 A50.-A53.
ICD-9 090-097
MedlinePlus 001327
eMedicine med/2224  emerg/563 derm/413

Syphilisis a curable sexually transmitted disease caused by the Treponema pallidum spirochete. The route of transmission of syphilis is almost always by sexual contact, although there are examples of congenital syphilis via transmission from mother to child in utero. The signs and symptoms of syphilis are numerous; before the advent of serological testing, precise diagnosis was very difficult. In fact, the disease was dubbed the "Great Imitator" because it was often confused with other diseases, particularly in its tertiary stage. Syphilis (unless antibiotic-resistant) can be easily treated with antibiotics including penicillin. The oldest and still most effective method is an intramuscular injection of benzathine penicillin. If not treated, syphilis can cause serious effects such as damage to the heart, aorta, brain, eyes, and bones. In some cases these effects can be fatal. In 1998, the complete genetic sequence of T. pallidum was published which may aid understanding of the pathogenesis of syphilis.

Contents

Alternative names

The name "syphilis" was coined by the Italian physician and poet Girolamo Fracastoro in his epic noted poem, written in Latin, entitled Syphilis sive morbus gallicus (Latin for "Syphilis or The French Disease") in 1530. The protagonist of the poem is a shepherd named Syphilus (perhaps a variant spelling of Sipylus, a character in Ovid's Metamorphoses). Syphilus is presented as the first man to contract the disease, sent by the god Apollo as punishment for the defiance that Syphilus and his followers had shown him. From this character Fracastoro derived a new name for the disease, which he also used in his medical text De Contagionibus ("On Contagious Diseases").[1]

Until that time, as Fracastoro notes, syphilis had been called the "French disease" in Italy and Germany, and the "Italian disease" in France. In addition, the Dutch called it the "Spanish disease", the Russians called it the "Polish disease", the Turks called it the "Christian disease" or "Frank disease" (frengi) and the Tahitians called it the "British disease". These 'national' names are due to the disease often being present among invading armies or sea crews, due to the high instance of unprotected sexual contact with prostitutes. It's interesting to notice how the invaders named it after the invaded country and vice versa. It was also called "Great pox" in the 16th century to distinguish it from smallpox. In its early stages, the Great pox produced a rash similar to smallpox (also known as variola). However, the name is misleading, as smallpox was a far more deadly disease. The terms "Lues" (or Lues venerea, Latin for "venereal plague") and "Cupid's disease" have also been used to refer to syphilis. In Scotland, Syphilis was referred to as the Grandgore. It was also called The Black Lion.

Origins

There have been three theories on the origin of syphilis which formed an ongoing debate in anthropological and historical fields.

The pre-Columbian theory holds that syphilis symptoms are described by Hippocrates in Classical Greece in its venereal/tertiary form. There are other suspected syphilis findings for pre-contact Europe, including at a 1314th century Augustinian friary in the northeastern English port of Kingston upon Hull. This city's maritime history is thought to have been a key factor in the transmission of syphilis.[2] Carbon dated skeletons of monks who lived in the friary showed bone lesions typical of venereal syphilis. Skeletons in pre-Columbus Pompeii and Metaponto in Italy demonstrating signs of congenital syphilis have also been found[3], although the interpretation of the evidence has been disputed.[4]

The Columbian Exchange theory holds that syphilis was a New World disease brought back by Columbus and Martin Alonzo Pinzon. Supporters of the Columbian theory find syphilis lesions on pre-contact Native Americans and cite documentary evidence linking crewmen of Columbus's voyages to the Naples outbreak of 1494.[5] A recent study of the genes of venereal syphilis and related bacteria have supported this theory, by locating an intermediate disease between yaws and syphilis in Guyana, South America.[6][7]

Historian Alfred Crosby suggests both theories are correct in a combination theory. Crosby's argument is built on the similarities of the species of bacteria which cause yaws and syphilis. The bacteria that causes syphilis belongs to the same phylogenetic family as the bacteria which cause yaws and several other diseases. Despite a tradition of assigning yaws's homeland to sub-Saharan Africa, Crosby notes that there is no unequivocal evidence of any related disease being present in pre-Columbian Europe, Africa, or Asia, while there is indisputable evidence of syphilis' presence in the pre-Columbian Americas. Conceding this point, Crosby writes, "It is not impossible that the organisms causing treponematosis arrived from America in the 1490s...and evolved into both venereal and non-venereal syphilis and yaws."[8]

However, Crosby considers it somewhat more likely that a highly contagious ancestral species of bacteria moved with early human ancestors across the land bridge of the Bering Straits many thousands of years ago without dying out in the original source population. He hypothesizes that "the differing ecological conditions produced different types of treponematosis and, in time, closely related but different diseases".[9] Thus, a weak, non-syphilitic bacteria survived in the Old World to eventually give rise to yaws or bejel, while a New World version evolved into the milder pinta and the more aggressive syphilis.

Going further than Crosby in arguing for worldwide incidence of syphilis prior to Columbus, Douglas Owsley, the famed physical anthropologist at the Smithsonian Institution, has written that many medieval European cases of leprosy, colloquially called "lepra," were actually cases of syphilis. Although folklore claimed that syphilis was unknown in Europe until the return of the diseased sailors of the Columbian voyages,

. . . syphilis probably cannot be "blamed"—as it often is—on any geographical area or specific race. The evidence suggests that the disease existed in both hemispheres from prehistoric times. It is only coincidental with the Columbus expeditions that the syphilis previously thought of as "lepra" flared into virulence at the end of the fifteenth century.[10]

Owsley noted that a Chinese medical case recorded in 2637 B.C.E. seems to be describing a case of syphilis, and that a European writer who recorded an outbreak of "lepra" in 1303 C.E. is "clearly describing syphilis".[10]

History

Image:Rembrandt Harmensz. van Rijn 095.jpg
Portrait of Gerard de Lairesse by Rembrandt van Rijn, ca. 1665-67, oil on canvas. De Lairesse, himself a painter and art theorist, suffered from congenital syphilis that severely deformed his face and eventually blinded him.[11]

While working at the Rockefeller University (then called the Rockefeller Institute for Medical Research) in 1913, Hideyo Noguchi, a Japanese scientist, demonstrated the presence of the spirochete Treponema pallidum in the brain of a progressive paralysis patient, proving that Treponema pallidum was the cause of the disease. [3] Prior to Noguchi's discovery, syphilis had been a burden to humanity in many lands, sometimes misdiagnosed and often misattributed to political enemies. Some famous historical personages, including Franz Schubert, Charles VIII, Hernando Cortez of Spain, Adolf Hitler, Benito Mussolini, and Ivan the Terrible, have been alleged to have had syphilis. Guy de Maupassant and possibly Friedrich Nietzsche are thought to have been driven insane and ultimately killed by the disease. Al Capone contracted syphilis as a young man. By the time he was incarcerated at Alcatraz, it reached its third stage, neurosyphilis, leaving him confused and disoriented. Syphilis led to the death of artist Edouard Manet and artist Paul Gauguin is also said to have suffered from syphilis. Composers who succumbed to syphilis include Hugo Wolf, Frederick Delius, Scott Joplin and possibly Franz Schubert.

The insanity caused by late-stage syphilis was once one of the more common forms of dementia; this was known as the general paresis of the insane. One suspected example is the insanity of noted composer Robert Schumann, although the precise cause of his death is still disputed by scholars.

The Russian author Leo Tolstoy suffered from syphilis during his youth, which was cured using arsenic treatment.[12]

A recent article in the European Journal of Neurology (June 2004) hypothesized that the founder of communism in Russia, Vladimir Ilyich Lenin, died of neurosyphilis.[13]

The rock critic Lester Bangs caught syphilis and was cured of it in his youth.

Karen Blixen, the author of Out of Africa, contracted syphilis from her husband while living in Africa. He had contracted the disease from an African woman with whom he had been "unfaithful". After having undergone treatment in Denmark, she returned to Africa. Blixen was unable to have children.

European outbreak

Image:DürerSyphilis1496.jpg
In this medical illustration attributed to Albrecht Dürer (1496), the disease is believed to have astrological causes.

The first well-recorded European outbreak of what is now known as syphilis occurred in 1494 when it broke out among French troops besieging Naples.[14] The French may have caught it via Spanish mercenaries serving King Charles of France in that siege.[10] From this centre, the disease swept across Europe. As Jared Diamond describes it, "when syphilis was first definitely recorded in Europe in 1495, its pustules often covered the body from the head to the knees, caused flesh to fall from people's faces, and led to death within a few months." In addition, the disease was more frequently fatal than it is today. Diamond concludes that "by 1546, the disease had evolved into the disease with the symptoms so well known to us today."[15] The epidemiology of this first syphilis epidemic shows that the disease was either new or a mutated form of an earlier disease.

Known and suspected notable syphilis-infected people in previous centuries

Keys: S - suspected case; - died of syphilis

Syphilis infection

Different manifestations occur depending on the stage of the disease:

Primary syphilis

Primary syphilis is typically acquired via direct sexual contact with the infectious lesions of a person with syphilis.[16] Approximately 10-90 days after the initial exposure (average 21 days), a skin lesion appears at the point of contact, which is usually the genitalia, but can be anywhere on the body. This lesion, called a chancre, is a firm, painless skin ulceration localized at the point of initial exposure to the spirochete, often on the penis, vagina or rectum. Rarely, there may be multiple lesions present although typically only one lesion is seen. The lesion may persist for 4 to 6 weeks and usually heals spontaneously. Local lymph node swelling can occur. During the initial incubation period, individuals are otherwise asymptomatic. As a result, many patients do not seek medical care immediately.

Syphilis can not be contracted through toilet seats, daily activities, hot tubs, or sharing eating utensils or clothing.[17]

Typical presentation of secondary syphilis rash on the palms of the hands and usually also seen on soles of feet
Typical presentation of secondary syphilis rash on the palms of the hands and usually also seen on soles of feet

Secondary syphilis

Secondary syphilis occurs approximately 1-6 months (commonly 6 to 8 weeks) after the primary infection. There are many different manifestations of secondary disease. There may be a symmetrical reddish-pink non-itchy rash on the trunk and extremities.[18] The rash can involve the palms of the hands and the soles of the feet. In moist areas of the body, the rash becomes flat broad whitish lesions known as condylomata lata. Mucous patches may also appear on the genitals or in the mouth. All of these lesions are infectious and harbor active treponeme organisms. A patient with syphilis is most contagious when he or she has secondary syphilis. Other symptoms common at this stage include fever, sore throat, malaise, weight loss, headache, meningismus, and enlarged lymph nodes. Rare manifestations include an acute meningitis that occurs in about 2% of patients, hepatitis, renal disease, hypertrophic gastritis, patchy proctitis, ulcerative colitis, rectosigmoid mass, arthritis, periostitis, optic neuritis, intersitial keratitis, iritis, and uveitis.

Latent syphilis

Latent syphilis is defined as having serologic proof of infection without signs or symptoms of disease.[16] Latent syphilis is further described as either early or late. Early latent syphilis is defined as having syphilis for two years or less from the time of initial infection without signs or symptoms of disease. Late latent syphilis is infection for greater than two years but without clinical evidence of disease. The distinction is important for both therapy and risk for transmission. In the real-world, the timing of infection is often not known and should be presumed to be late for the purpose of therapy. Early latent syphilis may be treated with a single intramuscular injection of a long-acting penicillin. Late latent syphilis, however, requires three weekly injections. For infectiousness, however, late latent syphilis is not considered as contagious as early latent syphilis.

Tertiary syphilis

Tertiary syphilis usually occurs 1-10 years after the initial infection, though in some cases it can take up to 50 years. This stage is characterized by the formation of gummas which are soft, tumor-like balls of inflammation known as granulomas. The granulomas are chronic and represent an inability of the immune system to completely clear the organism. Gummas were once readily seen in the skin and mucous membranes although they tend to occur internally in recent history. They may appear almost anywhere in the body including in the skeleton. The gummas produce a chronic inflammatory state in the body with mass-effects upon the local anatomy. Other characteristics of untreated tertiary syphilis include neuropathic joint disease, which are a degeneration of joint surfaces resulting from loss of sensation and fine position sense (proprioception). The more severe manifestations include neurosyphilis and cardiovascular syphilis. In a study of untreated syphilis, 10% of patients developed cardiovascular syphilis, 16% had gumma formation, and 7% had neurosyphilis.[19]

Neurological complications at this stage can be diverse. In some patients, manifestations include generalized paresis of the insane which results in personality changes, changes in emotional affect, hyperactive reflexes, and Argyll-Robertson pupil. This is a diagnostic sign in which the small and irregular pupils constrict in response to focusing the eyes, but not to light. Tabes dorsalis, also known as locomotor ataxia, a disorder of the spinal cord, often results in a characteristic shuffling gait. See below for more information about neurosyphilis.

Cardiovascular complications include syphilitic aortitis, aortic aneurysm, aneurysm of sinus of Valsalva, and aortic regurgitation. Syphilis infects the ascending aorta causing dilation and aortic regurgitation. This can be heard with a stethoscope as a heart murmur. The course can be insidious, and heart failure may be the presenting sign after years of disease. The infection can also occur in the coronary arteries and cause narrowing of the vessels. Syphilitic aortitis can cause de Musset's sign,[20] a bobbing of the head that de Musset first noted in Parisian prostitutes.

Neurosyphilis

Neurosyphilis refers to a site of infection involving the central nervous system (CNS). Neurosyphilis may occur at any stage of syphilis. Before the advent of antibiotics, it was typically seen in 25-35% of patients with syphilis. Neurosyphilis is now most common in patients with HIV infection. Reports of neurosyphilis in HIV-infected persons are similar to cases reported before the HIV pandemic. The precise extent and significance of neurologic involvement in HIV-infected patients with syphilis, reflected by either laboratory or clinical criteria, have not been well characterized. Furthermore, the alteration of host immunosuppression by antiretroviral therapy in recent years has further complicated such characterization.

Approximately 35% to 40% of persons with secondary syphilis have asymptomatic central nervous system (CNS) involvement, as demonstrated by any of these on cerebrospinal fluid (CSF) examination:

  • An abnormal leukocyte cell count, protein level, or glucose level
  • Demonstrated reactivity to Venereal Disease Research Laboratory (VDRL) antibody test

There are four clinical types of neurosyphilis:

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