EXPLAINING A DIFFERENT POINT OF VIEW - JULY 24, 2008
Explaining A Different Point of View - July 24, 2008
Cervical Cancer Vaccines Won’t Fight Existing HPV Infection
Study bolsters congratulations that effort be given before start of sexed activity
(HealthDay News) — Cervical cancer vaccines that preclude infection with the human papillomavirus (HPV) do not turn or eliminate preceding infections, a newborn study suggests.
That means that shots such as Gardasil, or a similar, yet-to-be-FDA-approved vaccine, Cervarix, should not be viewed as a treatment for women who’ve most likely shrunken the highly common, sexually transmitted virus through their partners.
“From a open health perspective, a population-wide perspective, the prizewinning move is to vaccinate girls and women before they initiate sexed activity,” said study scientist Allan Hildesheim, grownup investigator in the division of cancer epidemiology and genetics at the U.S. National Cancer Institute.
“You crapper then protect individuals preceding to their existence exposed, since the vaccine doesn’t have some effect after infection has happened,” he said.
The findings, reportable in the Aug. 15 issue of the Journal of the dweller Medical Association, support a congratulations in June from the U.S. Centers for Disease Control and Prevention that vaccination focus on girls 11 and 12 eld of age, most of whom would not have already embellish sexually active.
Gardasil, which targets four cancer-causing strains of the virus — 6, 11, 16 and 18 — should be additional to the list of turn edifice vaccinations, experts say.
On the another hand, “for women who have initiated sexed activity, cervical cancer display is belike a meliorate clogging measure than vaccination,” Hildesheim said.
His team’s NCI-funded study, which focused on the Cervarix vaccine, was conducted in Costa Rica and included nearly 2,200 women older 18 to 25. Cervarix has not still been authorised by the U.S. Food and Drug Administration, but its maker, GlaxoSmithKline, has said it believes the effort will gain support sometime in 2008.
According to Hildesheim, preceding studies had already strongly suggested that both Gardasil and Cervarix would be ineffective against preceding viral infections.
“However, we detected presently after the initial licensure of the [Gardasil] vaccine that there was tremendous fault — both in the clinical and the lay community, regarding the use of this vaccine among women who were already infected,” he said.
Other specialists have detected kindred fault among their peers.
“Each of us has conventional communicative reports of doctors thinking that you crapper goodness [an infected] woman by vaccinating her,” said Dr. Howard Strickler, academic of epidemiology and accumulation health at the Albert Einstein College of Medicine, in New royalty City. “There are misconceptions in the field,” he said.
Even though HPV occurs in a wide variety of strains, Cervarix targets the two strains thought to drive 70 proportionality of cervical malignancies — strains 16 and 18.
In the study, the researchers gave the vaccine to about 1,100 teen women, every of whom had tested constructive for genetic traces of HPV at the first of the study. Another group of infected teen women conventional a hepatitis A effort as a “control.”
By the end of 12 months, rates of HPV 16 and/or 18 “clearance” — or absence — from the embody was 48.8 proportionality in the HPV vaccine group and 49.8 proportionality among the controls — a statistical dead heat.
As the experience of the curb group showed, the human immune system course clears many HPV infections over time. Giving women the vaccine appeared to wage no additional benefit, the researchers said.
The investigators also observed no differences between the two groups in terms of the extent of HPV-linked disease, viral antibody load or the results of cervical radiophone tests conducted in the lab.
“Our results fortify the idea that this vaccine is meant to protect against infections when they occur, but it isn’t effective at helping country the infection erst it has established itself,” Hildesheim said.
Still, given the clothing of HPV viral strains, wouldn’t vaccination help protect against viral types a woman had perhaps not still encountered? Theoretically, that’s true, the experts said, and it is for exactly that think that the bureau recommends the vaccine for women up to geezerhood 26.
However, there’s currently no test that crapper determine a woman’s HPV history.
“If you are sexually active, there is no way for you to know for sure whether or not you have been exposed to these portion [carcinogenic] strains,” explained Hildesheim. They “are very common, and, typically, exposure happens fairly presently after the initiation of sexed activity,” he said. “That’s why the prizewinning contract is to try and get the vaccine administered preceding to sexed debut.”
So, for both girls and women, vaccinated or not, the expert advice on avoiding cervical cancer relic the same: Get lawful Pap smears.
“Remember, even [Gardasil] is just employed against four strains,” noted Dr. Stephanie Blank, a gynecologic oncologist and supporter academic of gynecologic oncology at New royalty University School of Medicine. “There are many more strains than that. So, the Pap smear recommendations have remained unchanged.”
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Human papillomavirus (HPV) infection
Human papillomavirus (HPV) infection
Infection with the human papillomavirus (HPV) usually does not drive some symptoms and does not ever display visible genital warts.
When symptoms do develop, they usually become 2 to 3 months after infection. However, symptoms have been known to develop from 3 weeks to many eld after infection.
Symptoms that may become with genital warts include:
- Irritation.
- Itching.
- Bleeding.
Genital warts
Genital warts crapper be different sizes and shapes.
- They may be large, or they may be too diminutive to be seen with the unclothed eye. They may materialize individually or in groups.
- Warts may look like tiny bunches of crucifer or like flat, white areas that are very difficult to see.
- In women and men, warts may materialize in the groin, on and around the genitals, in the urethra, or in the rectum or anus.
- In women:
- In men:
- Genital warts may become on the right of the member and scrotum.
- Men are ofttimes unaware they have genital warts, even when they crapper be seen, until the warts are identified by a health professional.
- Symptoms of genital warts may be kindred to those of other conditions.
Source from : yahoo health
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