TYPE OF STD / STI
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AGENTS CAUSING STD / STI
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COMMON STD / STI SYMPTOMS
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BACTERIA
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Syphilis |
Treponema pallidum |
A. Primary Syphilis
- Characterized by a single or less often multiple, painless, indurated ulcer (chancre) at the site of inoculation
- Regional lymph nodes are enlarged, feel rubbery and are painless
B. Secondary Syphilis
- Characterized by variable mucocutaneous and systemic signs e.g. symmetrical non-itchy rashes, mucous membrane lesions, patchy alopecia, generalised lymphadenopathy
C. Latent SyphilisD. Tertiary Syphilis |
Gonorrhea |
Neisseria gonorrhoeae |
- Common sites of infection include the urethra, the endocervix, the rectum, the pharynx and the conjunctiva
- Profuse purulent discharge from the affected genital site
- Often accompanied by local pain and discomfor
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Chlamydia Trachomatis
Non-gonococcal Urethritis (NGU) |
Chlamydia trachomatis
Ureaplasma urealyticum
Mycoplasma genitalium |
- Urethral discharge, dysuria, penile irritation or none
- May cause pelvic inflammatory disease, ectopic pregnancy and tubal infertility in women
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Bacterial Vaginosis |
Prevotella species, Mobiluncus species, Gardnerella vaginalis, Ureaplasma and Mycoplasma hominis |
- A fishy-smelling, thin homogenous vaginal discharge
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VIRUS
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Genital herpes |
Herpes simplex virus type 1 & 2 |
- Chronic, life-long viral infection
- May be asymptomatic or have mild, unrecognised symptoms
- Presents with multiple grouped vesicles, which rupture easily leaving painful erosions and ulcers
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Molluscum contagiosum |
Molluscum Contagiosum virus |
- Discrete, smooth, pearly or flesh-coloured, dome-shaped papules with a mildly erythematous base and a central punctum
- Often confined to the genital area
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Genital warts |
Human Papilloma Virus |
- Cause genital, papular and flat warts
- Condyloma acuminata – exophytic, filiform, cauliflower-shaped warts
- Multifocal – usually 5 to 15, in areas of trauma during sex, 1-10 mm diameter
- Oncogenic HPV – mostly give rise to subclinical lesions, intraepithelial neoplasia (IN) and anogenital cancer
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Viral Hepatitis |
Hepatitis A, B and C viruses |
- May be asymptomatic or have mild non-specific symptoms
- Flu-like symptoms (malaise, myalgia, fatigue), often with right upper abdominal pain
- Jaundice (hepatic and cholestatic) associated with anorexia, nausea, fatigue, liver enlargement and tenderness
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HIV and AIDs infection |
Human immunodeficiency virus type 1 & 2 |
1. Acute seroconversion
- Fever, flu-like illness, lymphadenopathy, and rash
2. Asymptomatic infection
- Few or no signs or symptoms for a few years to a decade or more
3. AIDS |
FUNGI
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Vaginal candidiasis |
Candida albicans |
- Female patients complain of vulval pruritus and discharge. Non-specific symptoms include soreness, burning, dyspareunia and external dysuria.
- Male patients may complain of a penile rash
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PROTOZOA
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Trichomoniasis |
Trichomonas vaginalis |
- Present with a purulent foul smelling vaginal discharge that is yellow-green in colour, and vulvar pruritus or irritation
- The vagina and cervix (strawberry cervix) are often inflamed
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PARASITES
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Scabies |
Sarcoptes scabiei |
- Pruritic papules on the genitals, finger webs, wrists, axillae and buttocks
- Nocturnal exacerbation of the itch
- Family members and sexual partners may have similar symptoms
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Pubic lice infestation |
Pediculosis pubic |
- Presence of brown adult lice on the pubic hair, body hair and rarely, eyebrows and eyelashes
- Presence of eggs (nits) which adhere to the hairs
- Small haemorrhagic spots may also be seen on the pubic/genital skin and underwear
- Blue macules (maculae caeruleae) may be visible at feeding sites
- May be no symptoms or there may be itch due to hypersensitivity to the feeding lice.
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