(Health) STD: Love and Sex Influence Disease Evolution
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#1: (Health) STD: Love and Sex Influence Disease Evolution Author: adediosLocation: Angel C. de Dios PostPosted: Fri Aug 11, 2006 12:06 pm

Love and Sex Influence Disease Evolution

By Abigail W. Leonard

posted: 10 August 2006
11:59 am ET

Dating, going steady, hooking up, settling down. There are many ways to be a couple and avoid the lovesick blues. Now it appears that in addition to lovesickness, there is a link between the types of relationships people have and how illness affect us all.

In a study of sexually transmitted diseases, scientists have concluded that the length of time people stay together can determine which infectious diseases circulate in a community and therefore how diseases evolve multiple strains.

Up to now, studies looking at how disease travels in groups worked with models that assumed people bump into each other at random, on a crowded street or some other public place. One disease strain could then hop easily from host to host until maximum infection was achieved.

In reality, of course, our interactions are more complicated. Some people have one long-term partner, while others come in contact with many people, each only for a short time.

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Questions to explore further this topic:

How are diseases transmitted?


Vector-Borne & Zoonotic Diseases


Diseases transmitted by food


Airborne transmission of diseases


What are sexually transmitted diseases(STD)?


What are the common STDs?


How can one prevent STDs?


What you don't know can hurt you. (A quiz from Mayo Clinic)


Sexually Transmitted Diseases Problem Set




Last edited by adedios on Sat Jan 27, 2007 4:45 pm; edited 2 times in total

#2: Blood transfusion-transmitted infections: A global perspecti Author: adediosLocation: Angel C. de Dios PostPosted: Wed Sep 27, 2006 10:11 pm
McMaster University

Blood transfusion-transmitted infections: A global perspective

Hamilton, ON (September 25, 2006) -- Thanks to the many blood-safety interventions introduced since 1984, the overall risk for most transfusion-transmitted infections has become exceedingly small.

In the September 28 issue of the New England Journal of Medicine, Dr. Morris Blajchman, professor of Medicine at McMaster University, and medical director, Canadian Blood Services (Hamilton Centre), with co-author Dr. Eleftherios Vamvakas of Ottawa, puts into perspective the continuing risk of transfusion-transmitted infections as well as the possible safety interventions that might reduce that risk even further, particularly those due to emerging agents including variant Creutzfeldt-Jakob disease (vCJD) the human counterpart to mad cow disease.

With regard to the emerging pathogens, several newly-developed pathogen-reduction technologies have been shown to be effective in destroying most bacteria, viruses and parasites in donated blood, but ineffective against the pathogens that cause neurodegenerative diseases and those viruses that are present in exceedingly high concentrations in blood.

Newer technologies can also have a downside, notes Blajchman. They tend to reduce the effectiveness of the blood components, necessitating the transfusion of greater quantities and thus exposing patients to blood from more donors; thereby increasing the risk of infection transmission by transfusion.

"The possible additional safety interventions that might further reduce the risk of transfusion-transmitted infections will be debated extensively over the next few years," says Blajchman.

"Regardless of the outcomes of these debates it is clear that the risk of transmission is not static. As new agents continue to emerge, old ones change their properties and epidemiologic patterns, and new information and technology become available to change our understanding of that risk."

The commentary by Blajchman and Vamvakas was written in relation to an article in the same issue of the journal concerning the transfusion-transmission of HHV-8, a virus that has the potential to cause skin tumors (Kaposi's Sarcoma) in immunocompromised recipients.

#3: Study Dispels Some Sexual Behavior Myths Author: adediosLocation: Angel C. de Dios PostPosted: Wed Nov 01, 2006 11:23 am
Study Dispels Some Sexual Behavior Myths

By Maria Cheng
Associated Press
posted: 01 November 2006
10:14 am ET

LONDON (AP) ─ In the first comprehensive global study of sexual behavior, British researchers found that people aren't losing their virginity at ever younger ages, married people have the most sex, and there is no firm link between promiscuity and sexually transmitted diseases.

The study was published Wednesday as part of a series on sexual and reproductive health by the British medical journal The Lancet. Professor Kaye Wellings of the London School of Hygiene and Tropical Medicines and her colleagues analyzed data from 59 countries.

Experts say the study will be useful not only in dispelling popular myths about sexual behavior, but in shaping policies that will help improve sexual health across the world.

Researchers looked at published studies on sexual behavior in the last decade. They also used data from national governments worldwide. Wellings noted that since the survey results were based on self-reporting, they could be susceptible to error.

Wellings said she was surprised by some of the survey's results.

“We did have some of our preconceptions dashed,'' she said, explaining they had expected to find the most promiscuous behavior in regions like Africa with the highest rates of sexually transmitted diseases. That was not the case, as multiple partners were more commonly reported in industrialized countries where the incidence of such diseases was relatively low.

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#4: Risk Factor: Throat cancer linked to virus spread by sex Author: adediosLocation: Angel C. de Dios PostPosted: Sat May 12, 2007 6:30 am
Week of May 12, 2007; Vol. 171, No. 19 , p. 291

Risk Factor: Throat cancer linked to virus spread by sex
Nathan Seppa

Cancer of the throat and tonsils can arise from infection with a sexually transmitted virus, a new study suggests.

Researchers report that the human papillomavirus (HPV) is much more likely to turn up in the throat cells of people with a malignancy called oropharyngeal cancer than in the throat cells of others. Moreover, the cancer patients were more apt to have engaged in oral sex with multiple partners over past years, suggesting a route of infection, the scientists report in the May 10 New England Journal of Medicine.

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