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STD Quick Facts & Stats from the ASHA and the CDC

General Statistics - Teens & STDs - Chlamydia - Herpes - Gonorrhea - Syphilis - HPV - PID

General Statistics

  • One in five people in the United States has an STD.
  • Two-thirds of all STDs occur in people 25 years of age or younger.
  • Less than half of adults ages 18 to 44 have ever been tested for an STD other than HIV / AIDS.
  • One in four new STD infections occur in teenagers.
  • Cervical cancer in women is linked to HPV (genital warts)
  • HPV is the most common STD in the United States. More than 5 million people are infected with HPV each year.
  • At least 15 percent of all infertile American women are infertile because of tubal damage caused by PID (pelvic inflammatory disease) the result of an untreated STD.
  • STDs, other than HIV, cost about $8 billion each year to diagnose and treat
  • One in five Americans have genital herpes, yet at least 80 percent of those with herpes are unaware they have it
  • At least one in four Americans will contract an STD at some point in their lives.

Teens & STDs

  • Compared to older adults, adolescents (10- to 19-year-olds) and young adults (20- to 24-year-olds) are at higher risk for acquiring STDs for a number of reasons: they may be more likely to have multiple (sequential or concurrent) sexual partners rather than a single, long-term relationship; they may be more likely to engage in unprotected intercourse; and they may select partners at higher risk.
  • Sexually active teenagers and young women are especially susceptible to the STD chlamydia because of the characteristics of the cells that form the lining of the cervical canal.
  • younger women consistently have higher positivity rates of chlamydia than older women, even as prevalence declines.
  • Among women, 15- to 19-year-olds had the highest rate of gonorrhea in 2000 compared to all other age categories
  • In addition, 20- to 29-year-old women had the highest rates of primary and secondary syphilis in 2000
  • Among men, 20- to 24-year-olds had the highest rate of gonorrhea and fourth highest rate of primary and secondary syphilis
  • In 2000, the highest age-specific gonorrhea rates among women and the third highest rates among men were in the 15- to 19-year-old group

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Chlamydia - Chlamydia is a common sexually transmitted disease (STD) caused by Chlamydia trachomatis, a bacterium, which can damage a woman's reproductive organs. Because symptoms of chlamydia are mild or absent, serious complications that cause irreversible damage, including infertility, can occur "silently" before a woman ever recognizes a problem.

  • Chlamydia is the most commonly reported STD in the United States.
  • An estimated 3 million Americans are infected with chlamydia each year
  • Chlamydia is known as a "silent" disease because three quarters of infected women and half of infected men have no symptoms.
  • Sexually active teenagers and young women are especially susceptible to chlamydia bacteria because of the characteristics of the cells that form the lining of the cervical canal.
  • Chlamydia untreated may result in PID (pelvic inflammatory disease) which causes infertility, ectopic (tubal) pregnancy, and chronic pelvic pain.
  • As with other inflammatory STDs, chlamydial infection can facilitate the transmission of HIV infection.
  • pregnant women infected with chlamydial infection can pass the infection to their infants during delivery, in fact Chlamydia is a leading cause of early infant pneumonia and conjunctivitis (pinkeye) in newborns.
  • From 1987 through 2000, the reported rates of chlamydial infection increased from 50.8 to 257.5 cases per 100,000 persons.
    The CDC reports that the rise in numbers is most likely because it is tested for more often and the tests to detect it are more sensitive than what was previously available.
  • For the years 1996-2000, the chlamydia case rates in the Southern region of the United States were higher than the rates in any other region of the country.
    The CDC reports that the higher rates in this region are because it is tested for more often and occurs more often. Before 1996, reported chlamydia rates were highest in the West and Midwest where more screening programs were in place.
  • The highest age-specific reported rates of chlamydia in 2000 occurred among 15- to 19- year-olds and 20- to 24-year-olds.
  • In 2000, the reported rate of chlamydia among African-American females in the U.S. was nine times higher than the rate among white U.S. females (1,539.8 and 174.3 per 100,000, respectively)
  • The chlamydia rate among U.S. African-American males was 13 times larger than that among white males (477.9 and 36.0 per 100,000 respectively).
  • Untreated chlamydia in men typically causes urethral infection. Infection sometimes spreads to the epididymis (a tube that carries sperm from the testis), causing pain, fever, and, potentially, infertility.
  • Chlamydia can be easily treated and cured with antibiotics.

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Herpes - A sexually transmitted disease (STD) caused by the herpes simplex viruses type 1 (HSV -1) and type 2 (HSV-2).

  • Herpes carries an increased likelihood of HIV transmission and acquisition.
  • There is no treatment that can cure herpes, but antiviral medications can shorten and prevent outbreaks during the period of time the person takes the medication.
  • Women who acquire genital herpes in pregnancy face a potentially fatal neonatal infection. (Herpes can be life threatening to an infant.)
  • A woman who contracts genital herpes during the third trimester of pregnancy is at a higher risk of passing herpes to the baby because she has not had time to build up antibodies to the virus.
  • It is rare for infants to contract herpes.
  • Twenty percent to 25 percent of pregnant women have genital herpes.
  • About 50 percent to 80 percent of the adult population in the United States has oral herpes.
  • Nationwide, 45 million people ages 12 and older, or one out of five of the total adolescent and adult population, are infected with HSV-2
  • HSV-2 infection is more common in women (approximately one out of four women) than in men (almost one out of five).
  • Since the late 1970s, the number of Americans with genital herpes infection has increased 30%. The largest increase is currently occurring in young white teens.
  • About one in five adults in the United States have genital herpes, however at least 80 percent are unaware that they have the virus.
  • Most people contract oral herpes when they are children by receiving a kiss from a friend or relative.
  • Anyone who is sexually active can contract genital herpes.
  • Herpes is transmitted through direct skin-to-skin contact. This occurs when a contagious area comes into contact with a mucous membrane, primarily the mouth and genitals.
  • Herpes can be transmitted when there are no symptoms present.
  • There are no documented cases of a person getting genital herpes from an inanimate object such as a toilet seat, bathtub or towel. Herpes is a very fragile virus and does not live long on surfaces.
  • Of those who have symptoms, they may show within days after contracting genital herpes, or it may take weeks, months or years.
  • Condoms do not provide complete protection because the condom may not cover the herpes sore(s), and viral shedding may occur anyway.

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Gonorrhea - Gonorrhea is caused by Neisseria gonorrhoeae, a bacterium that can grow and multiply easily in mucous membranes of the body. Gonorrhea bacteria can grow in the warm, moist areas of the reproductive tract, including the cervix (opening to the womb), uterus (womb), and fallopian tubes (egg canals) in women, and in the urethra (urine canal) in women and men. The bacteria can also grow in the mouth, throat, and anus.

  • Like Chlamydia, Gonorrhea is a major cause of PID (pelvic inflammatory disease) in the United States.
  • Epidemiologic and biologic studies provide strong evidence that gonococcal infections facilitate the transmission of HIV infection (If you have gonorrhea it is easier to get and to give HIV.)
  • Following a 73.9% decline in the reported rate of gonorrhea from 1975 to 1997, in 1998 the gonorrhea rate increased and has remained essentially unchanged through 2000
  • In 2000, 358,995 cases of gonorrhea were reported in the United States
  • There was no meaningful change in the reported gonorrhea rate among women between 1999 and 2000 (128.7 and 128.3 cases per 100,000 females respectively).
  • The gonorrhea rate in men remained the same with 134.7 and 134.6 cases per 100,000 males in 1999 and 2000, respectively.
  • Among women in 2000, 15- to 19-year-olds had the highest reported rate of gonorrhea, while among men, 20- to 24-year-olds had the highest rate
  • The percentage of men with gonorrhea who were reported to have had a gonorrhea infection in the previous year, as measured by the GISP, decreased from 21.5% in 1992 to 17.2% in 1999 but then rose to 23.6% in 2000
  • Ejaculation does not have to occur for gonorrhea to be transmitted or acquired.
  • Gonorrhea infection can spread to other unlikely parts of the body. For example, a person can get an eye infection after touching infected genitals and then the eyes.
  • Each year approximately 650,000 people in the United States are infected with gonorrhea.
  • In women, the early symptoms of gonorrhea are often mild, and many women who are infected have no symptoms of infection.
  • In the United States, approximately 75% of all reported gonorrhea is found in younger persons aged 15 to 29 years.
  • In 1999, 77% of the total number of cases of gonorrhea reported to the CDC occurred among African Americans.
  • Many of the currently used antibiotics can successfully cure gonorrhea in adolescents and adults. Penicillin is a common antibiotic that is no longer used to treat gonorrhea, because many strains of the gonorrhea bacterium have become resistant to penicillin.
  • In men, gonorrhea can cause epididymitis, a painful condition of the testicles that can sometimes lead to infertility if left untreated. Without prompt treatment, gonorrhea can also affect the prostate and can lead to scarring inside the urethra, making urination difficult.
  • If a pregnant woman has gonorrhea, she may give the infection to her infant as the baby passes through the birth canal during delivery. This can cause blindness, joint infection, or a life-threatening blood infection in the baby.

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Syphilis - Syphilis is a complex sexually transmitted disease (STD) caused by the bacterium Treponema pallidum. It has often been called "the great imitator" because so many of the signs and symptoms are indistinguishable from those of other diseases.

  • Syphilis is passed from person to person through direct contact with a syphilis sore. Sores occur mainly on the external genitals, vagina, anus, or in the rectum. Sores also can occur on the lips and in the mouth.
  • Syphilis cannot be spread by toilet seats, door knobs, swimming pools, hot tubs, bath tubs, shared clothing, or eating utensils.
  • The genital sores caused by syphilis in adults also make it easier to transmit and acquire HIV infection sexually. There is a 2- to 5-fold increased risk of acquiring HIV infection when syphilis is present.
  • Untreated early syphilis during pregnancy results in perinatal death in up to 40% of cases (Depending on how long a pregnant woman has been infected, she has a good chance of having a stillbirth (syphilitic stillbirth) or of giving birth to a baby who dies shortly after birth.)
  • If acquired during the four years preceding pregnancy, it may lead to infection of the fetus in over 70% of cases.
  • The rate of primary and secondary (P&S) syphilis reported in the United States is the lowest since reporting began in 1941.
  • In the United States, over 35,600 cases of syphilis were reported by health officials in 1999, including 6,650 cases of primary and secondary syphilis (a decline of 5.4% from 1998) and 556 cases of congenital syphilis in newborns.
  • A single dose of penicillin, an antibiotic, will cure a person who has had syphilis for less than a year.
  • In 2000, the reported rate of P&S syphilis among men (2.7 cases per 100,000 males) was 1.5 times greater than the rate among women (1.8 cases per 100,000 females). The overall male to female rate ratio has risen steadily since 1994 when it was 1.1
  • In 2000, the rate of P&S syphilis reported in African-Americans (12.8 cases per 100,000 persons) was 21 times greater than the rate reported in whites (0.6 case per 100,000 persons). However, this differential was substantially less than that in 1996, when the rate of P&S syphilis among African-Americans was 50 times greater than the rate reported among whites
  • Between 1996 and 1999, the rates of P&S syphilis within racial and ethnic groups generally declined. Group-specific rates remained relatively constant between 1999 and 2000, with the exception of the rate among African-Americans, which decreased from 15.0 to 12.8 cases per 100,000 persons during this period
  • Between 1999 and 2000, the overall rate of congenital syphilis decreased by 7.6% in the United States, from 14.5 to 13.4 cases per 100,000 live births
  • Condoms do not provide complete protection because syphilis sores can sometimes be on areas not covered by a condom. This is equally important for other STDs, including HIV, as well.

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Human Papillomavirus (HPV) - This refers to a group of more than 100 types of viruses some of which cause warts or benign tumors and over 30 of which are sexually transmitted.

  • HPVs are now recognized as the major cause of cervical cancer. Studies also suggest that HPVs may play a role in cancers of the anus, vulva, vagina, and penis, and some cancers of the oropharynx (the middle part of the throat that includes the soft palate, the base of the tongue, and the tonsils). (Read more from the National Cancer Institute.)
  • Approximately twenty million people are currently infected with HPV.
  • Fifty to 75% of sexually active men and women acquire genital HPV infection at some point in their lives.
  • About 5.5 million Americans get a new genital HPV infection each year.
  • Most HPV infections have no signs or symptoms; therefore, most infected persons are completely unaware they are infected, yet they can transmit the virus to a sex partner.
  • Rarely, pregnant women can pass HPV to their baby during vaginal delivery. A newborn that is exposed to HPV during delivery can develop warts in the larynx (voice box).
  • There is no "cure" for HPV, although the infection usually goes away on its own. Cancer-related types are more likely to persist.
  • Anyone who has sex is at risk for genital HPV infection.
  • Persistent infection with certain types of HPV is the key risk factor for cervical cancer.
  • The American Cancer Society estimated that about 12,800 women in the United States were diagnosed with invasive cervical cancer in 2000. In 2001, approximately 4,600 women will die from cervical cancer.
  • Abstinence is the most effective strategy to prevent HPV infection.
  • Two uninfected individuals who have no other sex partners besides each other cannot get genital HPV infection.
  • Condoms can reduce, but do not eliminate, the risk for transmission to uninfected partners.

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Pelvic Inflammatory Disease (PID) - This is a general term that refers to infection of the fallopian tubes (tubes that carry eggs from the ovary to the womb) and of other internal reproductive organs in women.

  • Each year in the United States, more than 1 million women experience an episode of acute PID
  • More than 100,000 women become infertile each year as a result of PID
  • a large proportion of the ectopic pregnancies occurring every year are due to the consequences of PID
  • More than 150 women die from this infection every year.
  • It is estimated that 10% to 80% of women with either gonorrhea or chlamydia will develop symptomatic PID.
  • Symptoms of PID vary from none to severe.
  • PID can be cured with antibiotics and prompt antibiotic treatment can prevent severe damage to pelvic organs.
  • About one fourth of women with suspected PID must be hospitalized.
  • Women with STDs--especially gonorrhea and chlamydia--are at increased risk for developing PID. A prior episode of PID increases the risk of another episode because the body's defenses are often damaged during the initial bout of infection.
  • Sexually active women under age 25 are more likely to develop PID than are women older than 25.
  • The more sex partners a woman has, the greater her risk of developing PID. Also, a woman whose partner has more than one sex partner is at greater risk of getting PID, because of the potential for more exposures to infectious agents.
  • Women who douche have a higher risk of developing PID compared with women who do not.
  • Women who have an intrauterine device (IUD) inserted may have a slightly increased risk of PID compared with women using other contraceptives or no contraceptive at all. Mutual monogamy is encouraged for women who choose to use this form of contraception to decrease the risk of getting PID.

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