Gonorrhea

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Related Key Words and Synonyms: Gonorrhea, Neisseria gonorrhoeae infection, clap, gonococcemia.

Overview

Gonorrhea (gonorrhoea in British English) is amongst the most common sexually transmitted diseases in the world and is caused by Gram-negative bacterium Neisseria gonorrheae. The term comes from Ancient Greek γονόρροια (gonórrhoia), literally "flow of seed"; in ancient times it was incorrectly believed that the pus discharge associated with the disease contained semen.

The first place this bacterium infects is usually the columnar epithelium of the urethra and endocervix. Non-genital sites in which it thrives are in the rectum, the oropharynx and the conjunctivae of the eyes. The vulva and vagina in women are usually spared because they are lined by stratified epithelial cells—in women the cervix is the usual first site of infection.

Gonorrhea spreads during sexual intercourse. Infected women also can pass gonorrhea to their newborn infants during delivery, causing eye infections (conjunctivitis) in their babies (which if left untreated, can cause blindness). Doctors have often attempted to treat this immediately by applying small amounts of silver nitrate to the eyes of all newborn babies. Gonorrhea among females can also be transmitted from one individual to another via contact to surfaces that may still be damp from prior contact.

Epidemiology and Demographics

Gonorrhea is a very common infectious disease. CDC estimates that more than 700,000 persons in the U.S. get new gonorrheal infections each year. Only about half of these infections are reported to CDC. In 2004, 330,132 cases of gonorrhea were reported to CDC. In the period from 1975 to 1997, the national gonorrhea rate declined, following the implementation of the national gonorrhea control program in the mid-1970s. After a small increase in 1998, the gonorrhea rate has decreased slightly since 1999. In 2004, the rate of reported gonorrheal infections was 113.5 per 100,000 persons.

Risk Factors

Any sexually active person can be infected with gonorrhea. In the United States, the highest reported rates of infection are among sexually active teenagers, young adults, and African Americans.

Pathophysiology & Etiology

Gonorrhea is spread through contact with the penis, vagina, mouth, or anus. Ejaculation does not have to occur for gonorrhea to be transmitted or acquired. Gonorrhea can also be spread from mother to baby during delivery.

People who have had gonorrhea and received treatment may get infected again if they have sexual contact with a person infected with gonorrhea.

Symptoms of gonorrhea

The incubation time varies from 2 to 14 days with most symptoms occurring between days 2 and 5 after being infected from an infected partner. A small number of people may be asymptomatic for up to a year. Between 30–60% of women with gonorrhea are asymptomatic or have subclinical disease. The woman may complain of vaginal discharge, difficulty urinating (dysuria), off-cycle menstrual bleeding, or bleeding after sexual intercourse. The cervix may appear anywhere from normal to the extreme of marked cervical inflammation (elephantitus) with pus. Infection of the urethra (urethritis) causes little dysuria or pus. The combination of urethritis and cervicitis on examination strongly supports a gonorrhea diagnosis, as both sites are infected in most gonorrhea patients.

More advanced symptoms, which may indicate development of pelvic inflammatory disease (PID), include cramps and pain, bleeding between menstrual periods, vomiting, or fever. It is not unusual for men to have asymptomatic gonorrhea. Men may complain of pain on urinating and thick, copious, urethral pus discharge (also known as gleet) is the most common presentation. Examination may show a reddened external urethral meatus. Ascending infection may involve the epididymis, testicles or prostate gland causing symptoms such as scrotal pain or swelling.

The fact sheet from the Centers for Disease Control (CDC) states, "Many men with gonorrhea may have no symptoms at all, some men have some signs or symptoms that appear two to five days after infection; symptoms can take as long as 30 days to appear. Symptoms and signs include a burning sensation when urinating, or a white, yellow, or green discharge from the penis. Sometimes men with gonorrhea get painful or swollen testicles."

Rectal gonorrhea

Rectal gonorrhea (gonococcal proctitis) may affect both men and women and is often asymptomatic. It may present with anal discharge, pain on defecating and rectal bleeding. Proctoscopy may show an inflamed mucous membrane with little mucus. Rectal infection also may cause no symptoms. It is transmitted by penetrative anal sex and is diagnosed on rectal swab. It cannot be treated with penicillin because rectal commensal bacteria in the rectum produce β-lactamase that protects the gonococcus from penicillin. It is usually contracted from having rough anal sex. It can be avoided by using toys instead.

Gonococcal pharyngitis

Infections of the throat are usually asymptomatic, but in some cases may cause a sore throat. This condition is diagnosed by a throat culture, utilizing a cotton swab; most cases of gonoccal pharyngitis are caused by oral sex with a partner infected with gonorrhea.

Diagnosis

Several laboratory tests are available to diagnose gonorrhea. A doctor or nurse can obtain a sample for testing from the parts of the body likely to be infected (cervix, urethra, rectum, or throat) and send the sample to a laboratory for analysis. Gonorrhea that is present in the cervix or urethra can be diagnosed in a laboratory by testing a urine sample.

History and Symptoms

Although many men with gonorrhea may have no symptoms at all, some men have some signs or symptoms that appear two to five days after infection; symptoms can take as long as 30 days to appear. Symptoms and signs include a burning sensation when urinating, or a white, yellow, or green discharge from the penis. Sometimes men with gonorrhea get painful or swollen testicles.

In women, the symptoms of gonorrhea are often mild, but most women who are infected have no symptoms. Even when a woman has symptoms, they can be so non-specific as to be mistaken for a bladder or vaginal infection. The initial symptoms and signs in women include a painful or burning sensation when urinating, increased vaginal discharge, or vaginal bleeding between periods. Women with gonorrhea are at risk of developing serious complications from the infection, regardless of the presence or severity of symptoms.

Symptoms of rectal infection in both men and women may include discharge, anal itching, soreness, bleeding, or painful bowel movements. Rectal infection also may cause no symptoms. Infections in the throat may cause a sore throat but usually causes no symptoms.

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  Skin lesion on foot in a patient with Gonorrhea

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  Gonococcal infection of the conjunctiva in a neonate

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  Penile discharge in a patient with Gonorrhea

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  Swollen testes consistent with epididymitis in a patient with Gonorrhea

Laboratory Findings

A quick laboratory test for gonorrhea that can be done in some clinics or doctor's offices is a Gram stain. A Gram stain of a sample from a urethra or a cervix allows the doctor to see the gonorrhea bacterium under a microscope. This test works better for men than for women.

Differential Diagnosis

Chlamydia and other STDs

Treatment

Gonorrhea treatment advertisement from 1944, when penicillin became widely available due to mass production.

Acute Pharmacotherapies

Several antibiotics can successfully cure gonorrhea in adolescents and adults. However, drug-resistant strains of gonorrhea are increasing in many areas of the world, including the United States, and successful treatment of gonorrhea is becoming more difficult. Because many people with gonorrhea also have chlamydia, another sexually transmitted disease, antibiotics for both infections are usually given together. Persons with gonorrhea should be tested for other STDs.

It is important to take all of the medication prescribed to cure gonorrhea. Although medication will stop the infection, it will not repair any permanent damage done by the disease. People who have had gonorrhea and have been treated can get the disease again if they have sexual contact with persons infected with gonorrhea. If a person's symptoms continue even after receiving treatment, he or she should return to a doctor to be reevaluated.

The mainstay of treatment is the appropriate use of antibiotics. While penicillin was the most common antibiotic used to treat gonorrhea up until the 1970s, an increase in antibiotic resistance has led to a decline in its use. Recommendations for first choice treatment of gonorrhea must depend on local information on resistance patterns and it is not possible to make treatment recommendations that are applicable to all parts of the world.

The Centers for Disease Control and Prevention (CDC) released a report on Thursday, April 12, 2007 officially adding gonorrhea to a list of super bugs that are now resistant to common antibiotics according to CDC.

Antibiotics that may be used to treat gonorrhea include:

• Amoxycillin 2 g plus probenecid 1 g orally
• Ampicillin 2 to 3 g plus probenecid 1 g orally
• Azithromycin 2 g orally
• Cefixime 400 mg orally
• Cefotaxime 500 mg by intramuscular injection
• Cefoxitin 2 g by intramuscular injection, plus probenecid 1 g orally
• Cefpodoxime (Vantin) 400 mg orally
• Ceftriaxone (Rocephin) 125 to 250 mg by intramuscular injection
• Ciprofloxacin 500 mg orally
• Levofloxacin 250 mg orally
• Ofloxacin 400 mg orally
• Spectinomycin 2 g by intramuscular injection

These drugs are all given as a single dose.

The level of tetracycline resistance in Neisseria gonorrheae is now so high as to make it completely ineffective in most parts of the world.

The fluoroquinolones (ciprofloxacin, ofloxacin, levofloxacin) cannot be used in pregnancy. It is important to refer all sexual partners to be checked for gonorrhea to prevent spread of the disease and to prevent the patient from becoming re-infected with gonorrhea. Patients should also be offered screening for other sexually transmitted infections. In areas where co-infection with chlamydia is common, doctors may prescribe a combination of antibiotics, such as ceftriaxone with doxycycline or azithromycin, to treat both diseases.

Penicillin is ineffective at treating rectal gonorrhea: this is because other bacteria within the rectum produce β-lactamases that destroy penicillin. All current treatments are less effective at treating gonorrhea of the throat, so the patient must be rechecked by throat swab 72 hours or more after being given treatment, and then retreated if the throat swab is still positive.

Although gonorrhea usually does not require follow-up (with the exception of rectal or pharyngeal disease), patients are usually advised to phone for results five to seven days after diagnosis to confirm that the antibiotic they received was likely to be effective. Patients are advised to abstain from sex during this time.

Drug resistant strains are known to exist.

United States recommendations

The United States does not have a federal system of sexual health clinics, and the majority of infections are treated in family practices. A third-generation cephalosporin antibiotic such as ceftriaxone is recommended for use in most areas. Since some areas such as Hawaii and California have very high levels of resistance to fluoroquinolone antibiotics (ciprofloxacin, ofloxacin, levofloxacin) they are no longer used empirically to treat infections originating in these areas.

United Kingdom recommendations

In the United Kingdom, the majority of patients with gonorrhea are treated in dedicated sexual health clinics. The current recommendation is for ceftriaxone or cefixime as first line therapy; no resistance to either drug has yet been reported in the UK. Levels of spectinomycin resistance in the UK are less than 1%, which would make it a good choice in theory, but intramuscular spectinomycin injection is very painful.

Azithromycin (given as a single dose of 2 g) is recommended if there is concurrent infection with chlamydia. A single dose of oral ciprofloxacin 500 mg is effective if the organism is known to be sensitive, but fluoroquinolones were removed from the UK recommendations for empirical therapy in 2003 because of increasing resistance rates. In 2005, resistance rates for ciprofloxacin were 22% for the whole of the UK (42% for London, 10% for the rest of the UK).

Historical Perspective of Treatment

Historically it has been suggested that mercury was used as a treatment for gonorrhea. Surgeons tools on board the recovered English warship the Mary Rose included a syringe that, according to some, was used to inject the mercury via the urinary meatus into any unfortunate crewman suffering from gonorrhea. Silver nitrate was one of the widely used drugs in the 19th century, but it became replaced by Protargol. Arthur Eichengrün invented this type of collodial silver which was marketed by Bayer from 1897 on. The silver based treatment was used until the first antibiotics came in use in the 1940's.

Complications

In men, inflammation of the epididymis (epididymitis), prostate gland (prostatitis) and urethral structure (urethritis) can result from untreated gonorrhea.

In women, untreated gonorrhea can result in cyst and abscess formation in one or more of the greater vestibular glands (bartholinitis), causing trouble walking; PID; and Fitz-Hugh-Curtis syndrome.

The most common result of untreated gonorrhea is pelvic inflammatory disease, a serious infection of the female reproductive tract. PID causes scarring of the fallopian tubes which leads to increased risks of causing an ectopic pregnancy as a fertilized egg may not be able to pass through the narrowed, scarred fallopian tube. Ectopic pregnancies are serious conditions which are potentially life-threatening to the mother.

In both sexes, disseminated gonococcal infection (DGI) can occur, leading to multiple distant sites of infection which can include the brain, heart and joints.

When joints become involved, gonococcal arthritis can develop. Gonococcal arthritis occurs after primary infection of the genitalia, anus, or throat. This occurs in about 1% of patients who are infected with gonorrhea and is more common in women than men. Typical symptoms include a 5–7 day history of fever, shaking, chills, multiple skin lesions, fleeting migratory polyarthralgias and tenosynovitis in fingers, wrists, toes or ankles. This should be evaluated promptly with a culture of the synovial fluid, blood, cervix, urethra, rectum, skin lesion fluid, or pharynx. The underlying gonorrhea should be treated; if this is done then usually a good prognosis will follow.

Slang terms

"The clap"

Gonorrhea is also commonly known by the slang term "the clap". One suggested etymology refers to a traditional treatment used to clear the blockage in the urethra from gonorrheal pus, where the penis would be "clapped" on both sides simultaneously. It could also refer to the painful sting in the male urethra, which feels like the sting of a clap (as in clapping hands) when infected with the disease. Yet another suggested source is from the old French word "clapier", meaning "brothel". Another suggested source for the term is from a notorious 18th century keeper of a brothel, Margaret Clap (better known as "Mother Clap"), though perhaps her name itself was derived from the slang term. This term has, in recent years, come to be used by extension to refer to any unspecified sexually transmitted disease.

External links

• http://www.cdc.gov/ncidod/diseases/submenus/sub_gonorrhea.htm
• http://www.cdc.gov/std/
• http://wwwn.cdc.gov/travel/yellowBookCh4-STD.aspx
• Centers for Disease Control and Prevention: Gonorrhea Information
• Drug-resistant gonorrhea on rise among gay men
• National Institute of Allergy and Infectious Diseases: Gonorrhea Factsheet
• MayoClinic.Com: Gonorrhea
• Gonhorrhea News & Treatment Information
• It's Your Health - Gonorrhea at Health Canada Retrieved 2 May, 2007.

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