bio 4 - Sexually Transmitted Infections or STIs Sexually...

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11/17/2016 1 Sexually Transmitted Infections Chicken pox and genital herpes are caused by closely related viruses Genital herpes stigmatized Chicken pox not so much Genital herpes = STI STIs are only illnesses categorized by mode of transmission rather than type of source Sexually Transmitted Infections or STIs All plants and animals that do sexually reproduce DO develop sexually transmitted infections or STIs When diagnosed early, most STIs can be successfully treated When left untreated, can lead to severe health problems i.e. pelvic inflammatory disease, infertility cancer and even death STI’s come from bacteria, viruses, parasitic insects , and other organisms such as protozoa Incidence/Prevalence Must differentiate between terms Incidence = number of new cases occurring in a population during specific time period Prevalence = number or percentage of people in group that have a particular condition STIs affect men and women of all ages, races, education, and economic levels Difficult to assess number of people with STIs Most cases are not reported if asymptomatic Incidence/Prevalence STI’s are most common in: People under the age of 25, minorities, women, and men who have sex with men Behavioral, biological, and cultural reasons underlying high rate of STIs among teens U.S. has highest rate of STI’s in industrialized world Up to 19 million new cases each year in US with almost half among individual ages 15-24 Although STI’s are incredibly common, there is a lack of awareness regarding symptoms, transmission, and scope of problem STI versus STD? The term “ infection ” means that a germ is present in one’s body, but the person may not have any signs or symptoms of the infection The term “ disease ” means that the infection is causing obvious signs or symptoms M any sexually transmitted infections do not result in signs or symptoms , so a person can have an STI and not know it. Term STI is a more encompassing term than STD, as it includes infections that cause no symptoms Sexually Transmitted Infections > 25 infectious agents transmitted by anal, oral or vaginal sex Effects not limited to reproductive organs Do not always involve sexual activity Some transmitted through genital secretions from someone who is infected through mucous membranes of another Warm moist passageways in & out of body such as urethra, vagina, mouth and anus HIV, gonorrhea, chlamydia and trichomoniasis Others by skin to skin contact or both Genital herpes and syphilis can use skin as entry and mucous membranes Implications for effectiveness of condoms
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11/17/2016 2 STIs caused by Bacteria: What are bacteria?
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