Most sexually transmitted infections (STIs) are caused by microorganisms – lifeforms that are too small to be seen without a microscope. Many STIs, however, are caused by viruses, which technically aren’t even alive. Rather, viruses are pieces of genetic information that are stored in protein capsules. When these capsules come into contact with a host cell, the genetic information is able to enter the cell and hijack its machinery so that the host cell manufactures copies of the virus, as well as potentially harmful viral proteins. Many well-known STIs, such as herpes and HIV/AIDS, are caused by viruses, but this month we will focus on two lesser-known viral STIs, cytomegalovirus and molluscum contagiosum. Your local Planned Parenthood health center, as well as other clinics, health departments, and private health-care providers, can help you get a diagnosis and treatment for these STIs.
Cytomegalovirus leaves granules inside its host cells called inclusion bodies, pictured here. Image: Public Health Image Library, CDC
The bad news is that most people are infected with cytomegalovirus (CMV) at some point in their lives. About 80 percent of the U.S. population is estimated to be carriers, about 4 in 10 Americans are infected with CMV before puberty (usually through contact with saliva), and adults can be reinfected through sexual activity. The good news is that among healthy adults, a CMV infection usually does not have any symptoms, though if they do they could seem like a mild case of mono. Being reinfected with the virus later in life also carries with it only a small risk for symptoms in healthy adults.
And back to the bad news: While an infection with cytomegalovirus usually does not have symptoms, if someone is infected while pregnant it can harm the fetus. About 1 in 100 U.S. babies is infected with CMV, but usually doesn’t show symptoms. Every year in the United States, around 5,500 babies are born with symptomatic cytomegalic inclusion disease (CID). Symptoms of CID vary, but the most severe include mental retardation and hearing loss. If the mother was already infected before conception, there is a 2 percent chance the virus will be transmitted to the fetus; however, if the infection occurs during pregnancy, this risk jumps into the 40 to 50 percent range. Continue reading
Posted in Sexual Health
Tagged CID, CMV, condom, condoms, cytomegalic inclusion disease, cytomegalovirus, cytomegalovirus retinitis, dental dam, dental dams, fetus, HCMV, Herpesviridae, herpesvirus, herpesviruses, HHV-5, HIV/AIDS, human cytomegalovirus, human herpesvirus-5, immune system, inclusion bodies, latex barriers, lesion, lesions, molluscum contagiousum virus, Poxviridae, pregnancy, sexually transmitted disease, sexually transmitted diseases, sexually transmitted infection, sexually transmitted infections, STD, STDs, STI, STIs, virus, wart, warts
- Women with children have more abortions than anyone else, and by an increasingly wide margin. So why is the topic taboo? (Slate Double X)
- If you couldn’t tell from recent events, in America, women’s lives are expendable. (The Hill)
- GOP presidential candidate, Rick Santorum, is a staunch opponent of birth control and asserts that contraception is a “license to do things.” “Things” that have absolutely nothing to do with him and are none of his damn business, but that’s of no consequence to him you see. In any case, this idiotic statement confirms that Ricky doesn’t want you women having a license to “do things” in the privacy of your own bedrooms that won’t lead to serious consequences like pregnancy! Why should you have that kind of freedom? Where do you think you are, America??? (RH Reality Check)
- In other, “Rick Santorum likes to speak out of his rectum” news, the birth control adversary recently argued that Republicans should work to lessen single motherhood in order to score political points against their Democratic rivals. You see, single mothers who run households, in Ricky’s opinion, have “a desire for government,” and thus, often vote Democrat. So let’s see if we have this straight: This dunce wants to lessen single motherhood and eliminate birth control because it gives women a “license to do things”? Mmmkay then. How exactly would you lessen single motherhood if you took away birth control? Don’t these goals wildly contradict one another? This guy is in no danger of being recruited by MENSA anytime soon, is he? (Feministing)
- Planned Parenthood’s stellar leader Cecile Richards opines on how parents are falling short with the “sex talk.” (Time)
- Can Herman Cain Be Pro-Life but Pro-Choice? Sorry Mr. Pizza Godfather, but no. (Slate Double X)
- What is Mitt Romney’s real stance on women’s health? Due to his incessant flip-flopping, your guess is as good as ours. (Planned Parenthood)
- Ten questions for anti-choice candidates who want to make abortion illegal. The first being, how much hard time should a woman do for terminating a pregnancy? I’d like to see if we could get an answer to that humdinger at the next GOP debate. (Ms. Magazine)
- Medical science FTW: A vaginal gel developed to reduce a woman’s risk of infection with the AIDS virus also cuts the risk of contracting genital herpes! (NYT)
Posted in Rundowns
Tagged abortion, AIDS, anti choice, birth control, Cecile Richards, contraception, Herman Cain, Mitt Romney, Planned Parenthood, politics, pro-choice, reproductive rights, Rick Santorum, sexually transmitted disease, sexually transmitted infection
Trichomonas vaginalis, normally pear-shaped, flattens itself out after attaching to vaginal epithelial cells, maximizing surface area between parasite and host. The purple rod-shaped organisms are bacteria. Image courtesy of Antonio Pereira-Neves and Marlene Benchimol, Santa Ursula University, Rio de Janeiro, Brazil
Most sexually transmitted infections are caused by viruses or bacteria. STIs caused by viruses include herpes and genital warts, and the viruses that cause them aren’t even technically living organisms – they are pieces of genetic information that are able to infect a host cell. STIs caused by bacteria include gonorrhea and syphilis; bacteria are microscopic, single-celled organisms with relatively simple cell structures.
But some STIs are caused by other types of living organisms. Protozoan organisms are microscopic and unicellular, like bacteria; unlike bacteria, their cell structures more closely resemble that of the so-called “higher” life forms such as animals and plants. While protozoa are considered to be “animal-like,” they are not animals at all – they are single-celled organisms that reproduce asexually. When certain types of protozoans get into your body, they can cause infections – such as trichomoniasis, the most common curable STI among young females (as well as more females over 40 than previously thought). It is estimated that 7.4 million new cases of trichomoniasis occur annually in the United States; worldwide, there are about 170 million cases each year.
Trichomoniasis, colloquially known as trich, is spread by vaginal or anal intercourse, direct vulva-to-vulva contact, and other activities that involve passing secretions from one partner to another (e.g., sharing sex toys or mutual masturbation). Sexually active people can reduce the risk of contracting trichomoniasis by using latex barriers, such as condoms. Continue reading
Posted in Sexual Health
Tagged bacteria, discharge, flagella, flagellum, HIV, immune system, latex barriers, metronidazole, parasite, parasites, protozoa, protozoans, sexually transmitted disease, sexually transmitted diseases, sexually transmitted infection, sexually transmitted infections, STD, STDs, STI, STIs, T. vaginalis, tinidazole, trich, Trichomonas vaginalis, trichomoniasis, trichomonosis, urogenital tract, vaginal discharge
Treponema pallidum, the causative agent of syphilis, is seen in this electron micrograph adhering to a surface with the end of its structure. Image: Public Health Image Library, CDC
When syphilis first descended upon Europe, it was seen as a new plague, and anxiety and blame coalesced around this mysterious scourge. Was it a punishment from God? Was it introduced by a hated Other? Was it caused by the stars’ alignment or the presence of “bad air”? The panic it provoked foreshadowed the hysteria that surrounded the emergence of HIV in the 1980s, as syphilitics were discriminated against, feared, or thought to have received punishment for their “unbridled lust.”
We now know that syphilis is not caused by supernatural forces, foreigners, or “bad air,” but rather by a species of spiral-shaped bacteria called Treponema pallidum, which can cause infections in the vagina, anus, urethra, or penis, as well as the lips and mouth. It is mostly spread by sexual contact – vaginal or anal intercourse, as well as oral sex – in which one person comes into contact with a syphilis sore. These sores can be hidden on the cervix or in the vagina, urethra, rectum, or mouth, making it not immediately apparent that one is infected with syphilis. Syphilis can also spread to a fetus during pregnancy. Sexually active people can reduce their risk of contracting syphilis by using latex barrier methods such as condoms or dental dams. Continue reading
Posted in Sexual Health
Tagged antibiotic, antibiotics, antigenic variation, arsenic, bacteria, chancre, Great Pox, gummatous syphilis, latent syphilis, lesion, lesions, malaria, malaria therapy, mercury, Neosalvarsan, Paul Ehrlich, penicillin, primary syphilis, Salvarsan, secondary syphilis, sexually transmitted disease, sexually transmitted diseases, sexually transmitted infection, sexually transmitted infections, spirochete, STD, STDs, STI, STIs, syphilis, T. pallidum, tertiary syphilis, Treponema pallidum, ulcer
Sexually transmitted infections can be caused by viruses, bacteria, protozoans, and even animals. Bacterial vaginosis and chancroid are both infections caused by bacteria, which means that they can be treated with antibiotics. While bacterial vaginosis only affects people with vaginas, chancroid disproportionately affects people with penises. You can seek diagnosis and treatment for bacterial vaginosis and chancroid at a Planned Parenthood health center, as well as health clinics, private health-care providers, and health departments.
Bacterial vaginosis is caused by an imbalance of bacteria species in the vagina. Image: renjith krishnan / FreeDigitalPhotos.net
Bacterial vaginosis seems to be most commonly caused by the bacteria species Gardnerella vaginalis. Scientists aren’t quite sure how this infection is caused, but risk seems to correlate with a change in sexual partners, having multiple sexual partners, douching, or using an intrauterine device; it can also occur in females who have never been sexually active. It is more common in pregnant women. There is no counterpart to this infection in males, although G. vaginalis can be found in their urethras; this raises the possibility that bacterial vaginosis can be sexually transmitted, in which case it could be directly transmitted between two females or indirectly transmitted from one female to another via a male.
Bacterial vaginosis seems to result from an imbalance in the vaginal flora (“flora” is a somewhat fanciful term for the bacteria that live in your body; under normal circumstances they are harmless and even beneficial). Vaginas usually are habitat to a population of bacteria called Lactobacillus, which produce hydrogen peroxide as a byproduct. When the number of Lactobacillus declines, G. vaginalis is able to move in on Lactobacillus’ old territory. The decrease in Lactobacillus and increase in G. vaginalis leads to a rise in the vagina’s pH. The new vaginal environment is less acidic and more alkaline; a vaginal pH of more than 4.5 is one criterion for the diagnosis of bacterial vaginosis. Another symptom includes a vaginal discharge that may smell somewhat fishy. There might also be genital itching or pain during urination. It is also possible not to have symptoms. Continue reading
Posted in Sexual Health
Tagged antibiotic, antibiotics, bacteria, bacterial vaginosis, chancroid, circumcision, discharge, douche, douching, erythromycin, G. vaginalis, Gardnerella vaginalis, H. ducreyi, Haemophilus ducreyi, intrauterine device, IUD, Lactobacillus, lesion, lymph node, lymph nodes, metronidazole, pelvic inflammatory disease, PID, pregnancy, pus, sexually transmitted disease, sexually transmitted diseases, sexually transmitted infection, sexually transmitted infections, sore, STD, STDs, STI, STIs, ulcer, uncircumcised, vagina, vaginal bacteria, vaginal discharge, vaginal flora, yogurt
You think you may have herpes, genital warts, or HIV, but you don’t have a doctor or are too ashamed and worried to go to a health center or clinic. So you research online and find impressive looking medical sites that offer “cures” for your condition. These claims sound too good to be true, and they are!
The Food and Drug Administration (FDA) and the Federal Trade Commission (FTC) have joined forces in the Fraudulent STD Products Initiative. The FDA is the government agency that evaluates drugs for safety and effectiveness. Together, these agencies are warning makers of these bogus products to change their claims or take these products off the market. The FDA states that none of these products has been shown to treat any disease and they may have untested ingredients that could cause harm. Dr. Debbie Birnkrant of the Food and Drug Administration warns that these products won’t work and may cause delays in someone getting treatment. Effective treatments for sexually transmitted diseases are only available by prescription through a health care provider. Continue reading
Neisseria gonorrhoeae, the bacteria species that causes gonorrhea, is pictured here in a photograph taken with a scanning electron microscope. Projecting from the organism’s surface are many pili, powerful appendages that enable the bacteria to adhere to human cells. Image from the National Institute of Biomedical Imaging and Bioengineering.
April is STD Awareness Month, but this blog has sought to increase your awareness of sexually transmitted infections on a monthly basis. So far in 2011 we’ve pointed the spotlight at human papillomavirus, barrier methods, and herpes. This month’s installment will focus on gonorrhea, colloquially known as “the clap,” a common sexually transmitted infection caused by sneaky bacteria called Neisseria gonorrhoeae. It is spread by vaginal, anal, and oral sex, and can infect certain cells in the throat, mouth, rectum, urethra, or cervix. It can also be transmitted manually to infect the eye. If you are sexually active, you can reduce risk of transmission by consistently and correctly using latex barriers such as condoms and dental dams.
Four out of five females infected with gonorrhea do not experience symptoms – males, however, usually do, but they can be mild and therefore easy to overlook. Symptoms can appear within a month, and might include painful or frequent urination, vaginal or penile discharge, painful bowel movements, itching, or sore throat. Additionally, females can experience abdominal pain, fever, irregular menstruation, or bleeding between periods. In pregnant women, untreated gonorrhea infections can lead to complications such as premature labor or stillbirth. The infection can also be passed from mother to infant during delivery. Continue reading
Posted in Sexual Health
Tagged antibiotic resistant gonorrhea, antibiotics, antigenic variation, ARG, bacteria, bacterium, DGI, disseminated gonococcal infection, epididymitis, evolution, fimbriae, flagella, flagellum, GC, gonococci, gonococcus, gonorrhea, HIV, immune response, immune system, microbe, microorganism, N. gonorrhoeae, Neisseria gonorrhoeae, Opa protein, Opa proteins, pelvic inflammatory disease, PID, pili, pilus, retractile pili, sexually transmitted disease, sexually transmitted infection, STD, STI, sulfa drugs, sulfanilamide, sulfonamides, the clap, type IV pili